/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:53:00,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:53:00,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:53:00,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:53:00,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-13 19:53:00,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-13 19:53:00,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-13 19:53:00,822 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-13 19:53:00,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-13 19:53:00,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-13 19:53:00,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-13 19:53:00,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-13 19:53:00,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 19:53:00,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 19:53:00,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 19:53:00,828 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:53:00,856 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:53:00,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:53:00,857 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:53:00,857 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:53:00,859 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:53:00,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:53:00,859 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:53:00,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:53:00,859 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:53:00,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:53:00,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:53:00,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:53:00,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:53:00,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:53:00,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:53:00,861 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:53:00,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:53:00,861 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:53:00,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:53:00,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:53:00,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:53:00,861 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:53:00,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:53:00,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:53:00,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:53:00,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:53:00,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:53:00,862 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:53:00,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:53:00,862 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:53:00,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:53:00,863 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:53:01,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:53:01,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:53:01,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:53:01,114 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:53:01,115 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:53:01,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl [2021-07-13 19:53:01,116 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl' [2021-07-13 19:53:01,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:53:01,167 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:53:01,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:53:01,168 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:53:01,168 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:53:01,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:53:01" (1/1) ... [2021-07-13 19:53:01,183 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:53:01" (1/1) ... [2021-07-13 19:53:01,188 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:53:01,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:53:01,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:53:01,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:53:01,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:53:01" (1/1) ... [2021-07-13 19:53:01,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:53:01" (1/1) ... [2021-07-13 19:53:01,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:53:01" (1/1) ... [2021-07-13 19:53:01,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:53:01" (1/1) ... [2021-07-13 19:53:01,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:53:01" (1/1) ... [2021-07-13 19:53:01,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:53:01" (1/1) ... [2021-07-13 19:53:01,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:53:01" (1/1) ... [2021-07-13 19:53:01,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:53:01,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:53:01,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:53:01,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:53:01,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:53:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:53:01,308 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:53:01,308 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:53:01,309 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:53:01,309 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:53:01,309 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:53:01,309 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:53:01,309 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:53:01,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:53:01,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:53:01,309 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 19:53:01,310 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 19:53:01,310 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 19:53:01,310 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-13 19:53:01,311 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-13 19:53:01,311 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-13 19:53:01,311 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-07-13 19:53:01,311 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-07-13 19:53:01,311 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-07-13 19:53:01,311 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-07-13 19:53:01,312 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-07-13 19:53:01,312 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-07-13 19:53:01,312 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:53:01,487 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:53:01,487 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-07-13 19:53:01,488 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-07-13 19:53:01,488 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-07-13 19:53:01,488 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-07-13 19:53:01,489 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-07-13 19:53:01,490 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:53:01 BoogieIcfgContainer [2021-07-13 19:53:01,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:53:01,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:53:01,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:53:01,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:53:01,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:53:01" (1/2) ... [2021-07-13 19:53:01,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec1848 and model type parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:53:01, skipping insertion in model container [2021-07-13 19:53:01,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:53:01" (2/2) ... [2021-07-13 19:53:01,496 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-2.wvr.bpl [2021-07-13 19:53:01,500 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:53:01,500 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:53:01,501 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:53:01,501 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:53:01,610 INFO L149 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-07-13 19:53:01,625 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-13 19:53:01,639 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:53:01,640 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:53:01,640 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:53:01,640 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:53:01,640 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:53:01,640 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:53:01,640 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:53:01,640 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread4Thread1of1ForFork4======== [2021-07-13 19:53:01,647 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-07-13 19:53:01,668 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 106 states, 105 states have (on average 2.9047619047619047) internal successors, (305), 105 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:01,670 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 105 states have (on average 2.9047619047619047) internal successors, (305), 105 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:01,676 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 19:53:01,676 INFO L301 ceAbstractionStarter]: Result for error location thread4Thread1of1ForFork4 was SAFE (1/3) [2021-07-13 19:53:01,678 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-13 19:53:01,680 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:53:01,680 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:53:01,680 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:53:01,680 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:53:01,680 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:53:01,680 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:53:01,680 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:53:01,680 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread1Thread1of1ForFork1======== [2021-07-13 19:53:01,682 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-07-13 19:53:01,688 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 86 states, 85 states have (on average 2.8941176470588235) internal successors, (246), 85 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:01,688 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 85 states have (on average 2.8941176470588235) internal successors, (246), 85 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:01,689 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 19:53:01,690 INFO L301 ceAbstractionStarter]: Result for error location thread1Thread1of1ForFork1 was SAFE (2/3) [2021-07-13 19:53:01,690 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:53:01,691 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:53:01,691 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:53:01,691 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:53:01,691 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:53:01,691 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:53:01,692 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:53:01,692 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:53:01,692 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:53:01,693 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-07-13 19:53:01,709 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 445 states, 444 states have (on average 3.7905405405405403) internal successors, (1683), 444 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:01,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 445 states, 444 states have (on average 3.7905405405405403) internal successors, (1683), 444 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:01,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:53:01,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:01,716 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:01,716 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:01,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:01,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1598114992, now seen corresponding path program 1 times [2021-07-13 19:53:01,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:01,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628077633] [2021-07-13 19:53:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:01,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:01,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628077633] [2021-07-13 19:53:01,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628077633] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:53:01,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:53:01,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:53:01,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225078018] [2021-07-13 19:53:01,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:53:01,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:01,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:53:01,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:53:01,989 INFO L87 Difference]: Start difference. First operand has 445 states, 444 states have (on average 3.7905405405405403) internal successors, (1683), 444 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:02,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:02,072 INFO L93 Difference]: Finished difference Result 893 states and 3368 transitions. [2021-07-13 19:53:02,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:53:02,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:53:02,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:02,088 INFO L225 Difference]: With dead ends: 893 [2021-07-13 19:53:02,088 INFO L226 Difference]: Without dead ends: 874 [2021-07-13 19:53:02,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:53:02,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-07-13 19:53:02,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 598. [2021-07-13 19:53:02,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.809045226130653) internal successors, (2274), 597 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:02,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 2274 transitions. [2021-07-13 19:53:02,152 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 2274 transitions. Word has length 25 [2021-07-13 19:53:02,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:02,152 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 2274 transitions. [2021-07-13 19:53:02,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 2274 transitions. [2021-07-13 19:53:02,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:53:02,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:02,157 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:02,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:53:02,157 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:02,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:02,158 INFO L82 PathProgramCache]: Analyzing trace with hash -841782840, now seen corresponding path program 2 times [2021-07-13 19:53:02,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:02,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284802392] [2021-07-13 19:53:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:02,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:02,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284802392] [2021-07-13 19:53:02,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284802392] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:53:02,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:53:02,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:53:02,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186904393] [2021-07-13 19:53:02,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:53:02,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:02,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:53:02,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:53:02,250 INFO L87 Difference]: Start difference. First operand 598 states and 2274 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:02,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:02,319 INFO L93 Difference]: Finished difference Result 872 states and 3319 transitions. [2021-07-13 19:53:02,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:53:02,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:53:02,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:02,327 INFO L225 Difference]: With dead ends: 872 [2021-07-13 19:53:02,328 INFO L226 Difference]: Without dead ends: 841 [2021-07-13 19:53:02,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:53:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-07-13 19:53:02,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 596. [2021-07-13 19:53:02,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.7663865546218487) internal successors, (2241), 595 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:02,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 2241 transitions. [2021-07-13 19:53:02,352 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 2241 transitions. Word has length 25 [2021-07-13 19:53:02,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:02,352 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 2241 transitions. [2021-07-13 19:53:02,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:02,352 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 2241 transitions. [2021-07-13 19:53:02,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:53:02,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:02,354 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:02,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 19:53:02,354 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:02,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:02,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1312476017, now seen corresponding path program 1 times [2021-07-13 19:53:02,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:02,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360858213] [2021-07-13 19:53:02,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:02,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:02,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:02,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360858213] [2021-07-13 19:53:02,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360858213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:02,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880339173] [2021-07-13 19:53:02,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:02,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 19:53:02,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:02,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880339173] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:53:02,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:53:02,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-07-13 19:53:02,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164634311] [2021-07-13 19:53:02,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:53:02,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:02,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:53:02,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:53:02,622 INFO L87 Difference]: Start difference. First operand 596 states and 2241 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:02,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:02,670 INFO L93 Difference]: Finished difference Result 867 states and 3197 transitions. [2021-07-13 19:53:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:53:02,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:53:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:02,676 INFO L225 Difference]: With dead ends: 867 [2021-07-13 19:53:02,676 INFO L226 Difference]: Without dead ends: 836 [2021-07-13 19:53:02,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:53:02,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-07-13 19:53:02,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 734. [2021-07-13 19:53:02,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.8663028649386084) internal successors, (2834), 733 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:02,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2834 transitions. [2021-07-13 19:53:02,699 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2834 transitions. Word has length 27 [2021-07-13 19:53:02,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:02,699 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 2834 transitions. [2021-07-13 19:53:02,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:02,699 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2834 transitions. [2021-07-13 19:53:02,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:53:02,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:02,701 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:02,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-13 19:53:02,919 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:02,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:02,919 INFO L82 PathProgramCache]: Analyzing trace with hash 731220239, now seen corresponding path program 2 times [2021-07-13 19:53:02,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:02,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259873750] [2021-07-13 19:53:02,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:02,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:02,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259873750] [2021-07-13 19:53:02,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259873750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:02,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649461670] [2021-07-13 19:53:02,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:03,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:03,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:03,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:53:03,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:03,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649461670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:03,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:03,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-07-13 19:53:03,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340132543] [2021-07-13 19:53:03,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:53:03,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:03,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:53:03,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:53:03,105 INFO L87 Difference]: Start difference. First operand 734 states and 2834 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:03,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:03,196 INFO L93 Difference]: Finished difference Result 1660 states and 6252 transitions. [2021-07-13 19:53:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:53:03,197 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:53:03,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:03,205 INFO L225 Difference]: With dead ends: 1660 [2021-07-13 19:53:03,205 INFO L226 Difference]: Without dead ends: 1532 [2021-07-13 19:53:03,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:03,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-07-13 19:53:03,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1029. [2021-07-13 19:53:03,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 4.135214007782102) internal successors, (4251), 1028 states have internal predecessors, (4251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:03,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 4251 transitions. [2021-07-13 19:53:03,255 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 4251 transitions. Word has length 27 [2021-07-13 19:53:03,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:03,255 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 4251 transitions. [2021-07-13 19:53:03,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:03,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 4251 transitions. [2021-07-13 19:53:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:53:03,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:03,258 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:03,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:03,473 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:03,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:03,473 INFO L82 PathProgramCache]: Analyzing trace with hash -700559147, now seen corresponding path program 3 times [2021-07-13 19:53:03,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:03,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250102049] [2021-07-13 19:53:03,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:03,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:03,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250102049] [2021-07-13 19:53:03,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250102049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:03,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133829006] [2021-07-13 19:53:03,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:03,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:53:03,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:03,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:53:03,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:03,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133829006] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:53:03,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:53:03,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-07-13 19:53:03,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365791145] [2021-07-13 19:53:03,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:53:03,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:03,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:53:03,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:53:03,631 INFO L87 Difference]: Start difference. First operand 1029 states and 4251 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:03,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:03,671 INFO L93 Difference]: Finished difference Result 1331 states and 5140 transitions. [2021-07-13 19:53:03,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:53:03,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:53:03,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:03,678 INFO L225 Difference]: With dead ends: 1331 [2021-07-13 19:53:03,678 INFO L226 Difference]: Without dead ends: 1250 [2021-07-13 19:53:03,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:53:03,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-07-13 19:53:03,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 954. [2021-07-13 19:53:03,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 4.074501573976915) internal successors, (3883), 953 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:03,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3883 transitions. [2021-07-13 19:53:03,706 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3883 transitions. Word has length 27 [2021-07-13 19:53:03,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:03,706 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3883 transitions. [2021-07-13 19:53:03,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:03,706 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3883 transitions. [2021-07-13 19:53:03,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:53:03,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:03,709 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:03,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:03,928 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:03,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:03,928 INFO L82 PathProgramCache]: Analyzing trace with hash 96535007, now seen corresponding path program 1 times [2021-07-13 19:53:03,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:03,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578425507] [2021-07-13 19:53:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:03,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:03,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578425507] [2021-07-13 19:53:03,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578425507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:03,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917383717] [2021-07-13 19:53:03,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:04,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 19:53:04,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:04,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917383717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:04,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:04,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-07-13 19:53:04,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143375363] [2021-07-13 19:53:04,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:53:04,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:04,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:53:04,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:53:04,110 INFO L87 Difference]: Start difference. First operand 954 states and 3883 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:04,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:04,165 INFO L93 Difference]: Finished difference Result 1888 states and 7508 transitions. [2021-07-13 19:53:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:53:04,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:53:04,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:04,174 INFO L225 Difference]: With dead ends: 1888 [2021-07-13 19:53:04,174 INFO L226 Difference]: Without dead ends: 1828 [2021-07-13 19:53:04,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:53:04,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-07-13 19:53:04,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1443. [2021-07-13 19:53:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1442 states have (on average 4.125520110957004) internal successors, (5949), 1442 states have internal predecessors, (5949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:04,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 5949 transitions. [2021-07-13 19:53:04,210 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 5949 transitions. Word has length 27 [2021-07-13 19:53:04,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:04,210 INFO L482 AbstractCegarLoop]: Abstraction has 1443 states and 5949 transitions. [2021-07-13 19:53:04,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:04,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 5949 transitions. [2021-07-13 19:53:04,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:53:04,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:04,213 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:04,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:04,429 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:04,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:04,429 INFO L82 PathProgramCache]: Analyzing trace with hash 55195285, now seen corresponding path program 2 times [2021-07-13 19:53:04,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:04,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823393381] [2021-07-13 19:53:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:04,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:04,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823393381] [2021-07-13 19:53:04,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823393381] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:53:04,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:53:04,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:53:04,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915062181] [2021-07-13 19:53:04,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:53:04,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:04,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:53:04,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:53:04,446 INFO L87 Difference]: Start difference. First operand 1443 states and 5949 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:04,486 INFO L93 Difference]: Finished difference Result 1479 states and 6007 transitions. [2021-07-13 19:53:04,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:53:04,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:53:04,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:04,495 INFO L225 Difference]: With dead ends: 1479 [2021-07-13 19:53:04,495 INFO L226 Difference]: Without dead ends: 1437 [2021-07-13 19:53:04,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:53:04,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2021-07-13 19:53:04,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1422. [2021-07-13 19:53:04,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 4.130190007037298) internal successors, (5869), 1421 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:04,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 5869 transitions. [2021-07-13 19:53:04,533 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 5869 transitions. Word has length 27 [2021-07-13 19:53:04,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:04,533 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 5869 transitions. [2021-07-13 19:53:04,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:04,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 5869 transitions. [2021-07-13 19:53:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:04,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:04,538 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:04,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 19:53:04,539 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:04,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1221830146, now seen corresponding path program 1 times [2021-07-13 19:53:04,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:04,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724230803] [2021-07-13 19:53:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:04,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:04,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724230803] [2021-07-13 19:53:04,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724230803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:04,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098811278] [2021-07-13 19:53:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:04,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:04,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:04,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 19:53:04,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:04,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:04,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:04,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-07-13 19:53:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:04,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098811278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:04,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:04,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-13 19:53:04,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460454919] [2021-07-13 19:53:04,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:04,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:04,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:04,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:04,963 INFO L87 Difference]: Start difference. First operand 1422 states and 5869 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:05,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:05,685 INFO L93 Difference]: Finished difference Result 1985 states and 8093 transitions. [2021-07-13 19:53:05,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:53:05,685 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:05,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:05,696 INFO L225 Difference]: With dead ends: 1985 [2021-07-13 19:53:05,696 INFO L226 Difference]: Without dead ends: 1966 [2021-07-13 19:53:05,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 495.6ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:53:05,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-07-13 19:53:05,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1519. [2021-07-13 19:53:05,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 4.118577075098814) internal successors, (6252), 1518 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:05,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 6252 transitions. [2021-07-13 19:53:05,735 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 6252 transitions. Word has length 29 [2021-07-13 19:53:05,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:05,735 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 6252 transitions. [2021-07-13 19:53:05,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:05,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 6252 transitions. [2021-07-13 19:53:05,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:05,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:05,739 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:05,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:05,953 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:05,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:05,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1456540984, now seen corresponding path program 2 times [2021-07-13 19:53:05,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:05,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136109375] [2021-07-13 19:53:05,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:06,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:06,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136109375] [2021-07-13 19:53:06,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136109375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:06,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523897275] [2021-07-13 19:53:06,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:06,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:06,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:06,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:06,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:06,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:06,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-07-13 19:53:06,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:06,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:06,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:06,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-13 19:53:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:06,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523897275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:06,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:06,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:06,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64503234] [2021-07-13 19:53:06,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:06,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:06,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:06,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:06,384 INFO L87 Difference]: Start difference. First operand 1519 states and 6252 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:06,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:06,689 INFO L93 Difference]: Finished difference Result 1822 states and 7414 transitions. [2021-07-13 19:53:06,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:53:06,689 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:06,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:06,699 INFO L225 Difference]: With dead ends: 1822 [2021-07-13 19:53:06,699 INFO L226 Difference]: Without dead ends: 1803 [2021-07-13 19:53:06,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 284.9ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:53:06,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2021-07-13 19:53:06,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1522. [2021-07-13 19:53:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 4.117028270874425) internal successors, (6262), 1521 states have internal predecessors, (6262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:06,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 6262 transitions. [2021-07-13 19:53:06,755 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 6262 transitions. Word has length 29 [2021-07-13 19:53:06,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:06,755 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 6262 transitions. [2021-07-13 19:53:06,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:06,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 6262 transitions. [2021-07-13 19:53:06,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:06,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:06,759 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:06,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:06,978 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:06,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:06,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2020138408, now seen corresponding path program 3 times [2021-07-13 19:53:06,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:06,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094913908] [2021-07-13 19:53:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:07,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:07,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094913908] [2021-07-13 19:53:07,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094913908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:07,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858681311] [2021-07-13 19:53:07,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:07,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:53:07,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:07,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:07,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:07,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:07,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-07-13 19:53:07,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:07,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:07,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:07,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-13 19:53:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:07,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858681311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:07,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:07,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:07,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772960080] [2021-07-13 19:53:07,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:07,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:07,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:07,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:07,379 INFO L87 Difference]: Start difference. First operand 1522 states and 6262 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:07,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:07,765 INFO L93 Difference]: Finished difference Result 1919 states and 7749 transitions. [2021-07-13 19:53:07,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:53:07,765 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:07,774 INFO L225 Difference]: With dead ends: 1919 [2021-07-13 19:53:07,774 INFO L226 Difference]: Without dead ends: 1900 [2021-07-13 19:53:07,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 330.5ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:53:07,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2021-07-13 19:53:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1529. [2021-07-13 19:53:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 4.111910994764398) internal successors, (6283), 1528 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:07,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 6283 transitions. [2021-07-13 19:53:07,808 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 6283 transitions. Word has length 29 [2021-07-13 19:53:07,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:07,808 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 6283 transitions. [2021-07-13 19:53:07,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:07,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 6283 transitions. [2021-07-13 19:53:07,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:07,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:07,812 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:08,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 19:53:08,025 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:08,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:08,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1903603882, now seen corresponding path program 4 times [2021-07-13 19:53:08,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:08,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814234792] [2021-07-13 19:53:08,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:08,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:08,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814234792] [2021-07-13 19:53:08,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814234792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:08,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65629487] [2021-07-13 19:53:08,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:08,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:08,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:08,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:08,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:08,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-07-13 19:53:08,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:08,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:08,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:08,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:15 [2021-07-13 19:53:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:08,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65629487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:08,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:08,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-13 19:53:08,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150834902] [2021-07-13 19:53:08,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:08,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:08,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:08,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:08,332 INFO L87 Difference]: Start difference. First operand 1529 states and 6283 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:08,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:08,968 INFO L93 Difference]: Finished difference Result 2650 states and 10619 transitions. [2021-07-13 19:53:08,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:53:08,968 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:08,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:08,977 INFO L225 Difference]: With dead ends: 2650 [2021-07-13 19:53:08,977 INFO L226 Difference]: Without dead ends: 2626 [2021-07-13 19:53:08,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 427.2ms TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:53:08,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-07-13 19:53:09,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1650. [2021-07-13 19:53:09,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 4.138872043662826) internal successors, (6825), 1649 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:09,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 6825 transitions. [2021-07-13 19:53:09,019 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 6825 transitions. Word has length 29 [2021-07-13 19:53:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:09,019 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 6825 transitions. [2021-07-13 19:53:09,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 6825 transitions. [2021-07-13 19:53:09,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:09,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:09,023 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:09,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-13 19:53:09,240 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:09,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:09,241 INFO L82 PathProgramCache]: Analyzing trace with hash 235210440, now seen corresponding path program 5 times [2021-07-13 19:53:09,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:09,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045432637] [2021-07-13 19:53:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:09,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:09,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045432637] [2021-07-13 19:53:09,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045432637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:09,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125494479] [2021-07-13 19:53:09,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:09,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:09,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:09,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:09,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:09,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-07-13 19:53:09,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:09,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:09,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:09,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:15 [2021-07-13 19:53:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:09,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125494479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:09,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:09,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-13 19:53:09,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828668852] [2021-07-13 19:53:09,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:09,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:09,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:09,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:09,512 INFO L87 Difference]: Start difference. First operand 1650 states and 6825 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:10,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:10,089 INFO L93 Difference]: Finished difference Result 2697 states and 10750 transitions. [2021-07-13 19:53:10,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:53:10,089 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:10,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:10,098 INFO L225 Difference]: With dead ends: 2697 [2021-07-13 19:53:10,099 INFO L226 Difference]: Without dead ends: 2648 [2021-07-13 19:53:10,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 410.3ms TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:53:10,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-07-13 19:53:10,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1614. [2021-07-13 19:53:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1613 states have (on average 4.145071295722257) internal successors, (6686), 1613 states have internal predecessors, (6686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:10,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 6686 transitions. [2021-07-13 19:53:10,141 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 6686 transitions. Word has length 29 [2021-07-13 19:53:10,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:10,141 INFO L482 AbstractCegarLoop]: Abstraction has 1614 states and 6686 transitions. [2021-07-13 19:53:10,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:10,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 6686 transitions. [2021-07-13 19:53:10,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:10,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:10,145 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:10,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:10,363 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:10,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:10,363 INFO L82 PathProgramCache]: Analyzing trace with hash -986184770, now seen corresponding path program 6 times [2021-07-13 19:53:10,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:10,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034779497] [2021-07-13 19:53:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:10,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:10,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:10,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034779497] [2021-07-13 19:53:10,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034779497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:10,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326553951] [2021-07-13 19:53:10,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:10,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:53:10,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:10,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:53:10,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:10,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-07-13 19:53:10,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:10,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:10,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:10,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:20 [2021-07-13 19:53:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:10,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326553951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:10,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:10,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-13 19:53:10,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420163242] [2021-07-13 19:53:10,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:53:10,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:10,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:53:10,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:10,740 INFO L87 Difference]: Start difference. First operand 1614 states and 6686 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:11,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:11,486 INFO L93 Difference]: Finished difference Result 2293 states and 9357 transitions. [2021-07-13 19:53:11,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:53:11,487 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:11,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:11,495 INFO L225 Difference]: With dead ends: 2293 [2021-07-13 19:53:11,495 INFO L226 Difference]: Without dead ends: 2274 [2021-07-13 19:53:11,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 552.0ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:53:11,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-07-13 19:53:11,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 1602. [2021-07-13 19:53:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1601 states have (on average 4.147407870081199) internal successors, (6640), 1601 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 6640 transitions. [2021-07-13 19:53:11,538 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 6640 transitions. Word has length 29 [2021-07-13 19:53:11,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:11,538 INFO L482 AbstractCegarLoop]: Abstraction has 1602 states and 6640 transitions. [2021-07-13 19:53:11,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:11,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 6640 transitions. [2021-07-13 19:53:11,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:11,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:11,542 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:11,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:11,757 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:11,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:11,758 INFO L82 PathProgramCache]: Analyzing trace with hash -68027252, now seen corresponding path program 7 times [2021-07-13 19:53:11,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:11,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006594528] [2021-07-13 19:53:11,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:11,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:11,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006594528] [2021-07-13 19:53:11,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006594528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:11,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883170221] [2021-07-13 19:53:11,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:11,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:11,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:12,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-13 19:53:12,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:12,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:12,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:12,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 19:53:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:12,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883170221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:12,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:12,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-13 19:53:12,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930973741] [2021-07-13 19:53:12,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:12,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:12,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:12,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:12,113 INFO L87 Difference]: Start difference. First operand 1602 states and 6640 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:12,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:12,902 INFO L93 Difference]: Finished difference Result 2621 states and 10631 transitions. [2021-07-13 19:53:12,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:53:12,902 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:12,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:12,912 INFO L225 Difference]: With dead ends: 2621 [2021-07-13 19:53:12,913 INFO L226 Difference]: Without dead ends: 2583 [2021-07-13 19:53:12,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:53:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2021-07-13 19:53:12,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 1794. [2021-07-13 19:53:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 4.1751254880089235) internal successors, (7486), 1793 states have internal predecessors, (7486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:12,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 7486 transitions. [2021-07-13 19:53:12,969 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 7486 transitions. Word has length 29 [2021-07-13 19:53:12,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:12,969 INFO L482 AbstractCegarLoop]: Abstraction has 1794 states and 7486 transitions. [2021-07-13 19:53:12,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:12,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 7486 transitions. [2021-07-13 19:53:12,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:12,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:12,977 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:13,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 19:53:13,188 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:13,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1235245354, now seen corresponding path program 8 times [2021-07-13 19:53:13,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:13,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548148518] [2021-07-13 19:53:13,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:13,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:13,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548148518] [2021-07-13 19:53:13,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548148518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:13,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130215035] [2021-07-13 19:53:13,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:13,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:13,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:13,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:13,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:13,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:13,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:13,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:13,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:13,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:13,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:53:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:13,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130215035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:13,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:13,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:13,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374705884] [2021-07-13 19:53:13,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:13,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:13,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:13,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:13,561 INFO L87 Difference]: Start difference. First operand 1794 states and 7486 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:13,965 INFO L93 Difference]: Finished difference Result 2154 states and 8857 transitions. [2021-07-13 19:53:13,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:53:13,965 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:13,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:13,971 INFO L225 Difference]: With dead ends: 2154 [2021-07-13 19:53:13,971 INFO L226 Difference]: Without dead ends: 2141 [2021-07-13 19:53:13,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 376.8ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:53:13,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-07-13 19:53:14,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 1787. [2021-07-13 19:53:14,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 4.1780515117581185) internal successors, (7462), 1786 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:14,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 7462 transitions. [2021-07-13 19:53:14,018 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 7462 transitions. Word has length 29 [2021-07-13 19:53:14,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:14,018 INFO L482 AbstractCegarLoop]: Abstraction has 1787 states and 7462 transitions. [2021-07-13 19:53:14,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:14,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 7462 transitions. [2021-07-13 19:53:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:14,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:14,023 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:14,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 19:53:14,239 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:14,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:14,240 INFO L82 PathProgramCache]: Analyzing trace with hash 335883282, now seen corresponding path program 9 times [2021-07-13 19:53:14,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:14,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906529991] [2021-07-13 19:53:14,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:14,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:14,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:14,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906529991] [2021-07-13 19:53:14,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906529991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:14,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725441985] [2021-07-13 19:53:14,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:14,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:53:14,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:14,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:53:14,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:14,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:14,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:14,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:14,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:14,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:14,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-07-13 19:53:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:14,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725441985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:14,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:14,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:14,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786863054] [2021-07-13 19:53:14,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:14,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:14,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:14,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:14,556 INFO L87 Difference]: Start difference. First operand 1787 states and 7462 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:14,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:14,905 INFO L93 Difference]: Finished difference Result 2189 states and 8940 transitions. [2021-07-13 19:53:14,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:53:14,905 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:14,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:14,911 INFO L225 Difference]: With dead ends: 2189 [2021-07-13 19:53:14,911 INFO L226 Difference]: Without dead ends: 2174 [2021-07-13 19:53:14,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 277.9ms TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:53:14,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-07-13 19:53:14,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 1794. [2021-07-13 19:53:14,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 4.173452314556609) internal successors, (7483), 1793 states have internal predecessors, (7483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:14,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 7483 transitions. [2021-07-13 19:53:14,946 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 7483 transitions. Word has length 29 [2021-07-13 19:53:14,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:14,947 INFO L482 AbstractCegarLoop]: Abstraction has 1794 states and 7483 transitions. [2021-07-13 19:53:14,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:14,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 7483 transitions. [2021-07-13 19:53:14,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:14,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:14,950 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:15,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 19:53:15,167 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:15,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:15,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1444715020, now seen corresponding path program 10 times [2021-07-13 19:53:15,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:15,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706371804] [2021-07-13 19:53:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:15,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:15,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706371804] [2021-07-13 19:53:15,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706371804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:15,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718977725] [2021-07-13 19:53:15,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:15,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:15,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:15,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:15,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:15,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-13 19:53:15,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:15,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:15,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:15,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 19:53:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:15,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718977725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:15,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:15,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-13 19:53:15,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547324505] [2021-07-13 19:53:15,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:15,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:15,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:15,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:15,573 INFO L87 Difference]: Start difference. First operand 1794 states and 7483 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:16,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:16,170 INFO L93 Difference]: Finished difference Result 2601 states and 10341 transitions. [2021-07-13 19:53:16,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:53:16,170 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:16,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:16,177 INFO L225 Difference]: With dead ends: 2601 [2021-07-13 19:53:16,177 INFO L226 Difference]: Without dead ends: 2561 [2021-07-13 19:53:16,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 470.4ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:53:16,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-07-13 19:53:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 1747. [2021-07-13 19:53:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 4.18213058419244) internal successors, (7302), 1746 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:16,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 7302 transitions. [2021-07-13 19:53:16,215 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 7302 transitions. Word has length 29 [2021-07-13 19:53:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:16,215 INFO L482 AbstractCegarLoop]: Abstraction has 1747 states and 7302 transitions. [2021-07-13 19:53:16,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:16,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 7302 transitions. [2021-07-13 19:53:16,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:16,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:16,219 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:16,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:16,433 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:16,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1050279366, now seen corresponding path program 11 times [2021-07-13 19:53:16,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:16,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226932187] [2021-07-13 19:53:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:16,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:16,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226932187] [2021-07-13 19:53:16,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226932187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:16,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416624257] [2021-07-13 19:53:16,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:16,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:53:16,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:16,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:16,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:16,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-13 19:53:16,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:16,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:16,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:16,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 19:53:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:16,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416624257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:16,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:16,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-13 19:53:16,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911020538] [2021-07-13 19:53:16,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:16,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:16,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:16,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:16,754 INFO L87 Difference]: Start difference. First operand 1747 states and 7302 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:17,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:17,380 INFO L93 Difference]: Finished difference Result 2160 states and 8941 transitions. [2021-07-13 19:53:17,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:53:17,380 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:17,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:17,385 INFO L225 Difference]: With dead ends: 2160 [2021-07-13 19:53:17,386 INFO L226 Difference]: Without dead ends: 2145 [2021-07-13 19:53:17,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 491.5ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:53:17,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-07-13 19:53:17,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1744. [2021-07-13 19:53:17,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 4.183591508892714) internal successors, (7292), 1743 states have internal predecessors, (7292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 7292 transitions. [2021-07-13 19:53:17,437 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 7292 transitions. Word has length 29 [2021-07-13 19:53:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:17,437 INFO L482 AbstractCegarLoop]: Abstraction has 1744 states and 7292 transitions. [2021-07-13 19:53:17,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:17,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 7292 transitions. [2021-07-13 19:53:17,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:17,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:17,444 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:17,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 19:53:17,657 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:17,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:17,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2099051768, now seen corresponding path program 12 times [2021-07-13 19:53:17,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:17,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628574480] [2021-07-13 19:53:17,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:17,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:17,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628574480] [2021-07-13 19:53:17,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628574480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:17,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935211452] [2021-07-13 19:53:17,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:17,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:53:17,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:17,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:53:17,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:17,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:17,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:17,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:17,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:17,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:17,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-07-13 19:53:17,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:17,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935211452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:17,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:17,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:53:17,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55221309] [2021-07-13 19:53:17,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:17,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:17,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:17,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:17,940 INFO L87 Difference]: Start difference. First operand 1744 states and 7292 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:18,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:18,240 INFO L93 Difference]: Finished difference Result 2257 states and 9217 transitions. [2021-07-13 19:53:18,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:53:18,240 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:18,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:18,246 INFO L225 Difference]: With dead ends: 2257 [2021-07-13 19:53:18,246 INFO L226 Difference]: Without dead ends: 2238 [2021-07-13 19:53:18,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:53:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-07-13 19:53:18,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 1814. [2021-07-13 19:53:18,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 4.200220628792057) internal successors, (7615), 1813 states have internal predecessors, (7615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 7615 transitions. [2021-07-13 19:53:18,283 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 7615 transitions. Word has length 29 [2021-07-13 19:53:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:18,283 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 7615 transitions. [2021-07-13 19:53:18,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:18,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 7615 transitions. [2021-07-13 19:53:18,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:18,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:18,289 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:18,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:18,502 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:18,503 INFO L82 PathProgramCache]: Analyzing trace with hash -795779162, now seen corresponding path program 13 times [2021-07-13 19:53:18,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:18,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305150277] [2021-07-13 19:53:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:18,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:18,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305150277] [2021-07-13 19:53:18,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305150277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:18,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708785290] [2021-07-13 19:53:18,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:18,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:18,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:18,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-13 19:53:18,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:18,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:18,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:18,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 19:53:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:18,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708785290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:18,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:18,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-13 19:53:18,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944485041] [2021-07-13 19:53:18,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:18,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:18,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:18,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:18,767 INFO L87 Difference]: Start difference. First operand 1814 states and 7615 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:19,351 INFO L93 Difference]: Finished difference Result 2776 states and 11185 transitions. [2021-07-13 19:53:19,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:53:19,351 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:19,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:19,359 INFO L225 Difference]: With dead ends: 2776 [2021-07-13 19:53:19,359 INFO L226 Difference]: Without dead ends: 2752 [2021-07-13 19:53:19,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:53:19,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-07-13 19:53:19,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 1926. [2021-07-13 19:53:19,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 4.208311688311689) internal successors, (8101), 1925 states have internal predecessors, (8101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:19,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 8101 transitions. [2021-07-13 19:53:19,402 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 8101 transitions. Word has length 29 [2021-07-13 19:53:19,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:19,402 INFO L482 AbstractCegarLoop]: Abstraction has 1926 states and 8101 transitions. [2021-07-13 19:53:19,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:19,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 8101 transitions. [2021-07-13 19:53:19,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:19,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:19,406 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:19,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:19,613 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:19,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:19,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1830794692, now seen corresponding path program 14 times [2021-07-13 19:53:19,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:19,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766523575] [2021-07-13 19:53:19,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:19,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:19,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766523575] [2021-07-13 19:53:19,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766523575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:19,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344704285] [2021-07-13 19:53:19,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:19,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:19,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:19,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:19,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:19,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:19,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:19,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:19,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:19,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:19,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:53:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:19,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344704285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:19,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:19,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:19,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249543642] [2021-07-13 19:53:19,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:19,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:19,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:19,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:19,918 INFO L87 Difference]: Start difference. First operand 1926 states and 8101 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:20,246 INFO L93 Difference]: Finished difference Result 2334 states and 9589 transitions. [2021-07-13 19:53:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:53:20,246 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:20,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:20,252 INFO L225 Difference]: With dead ends: 2334 [2021-07-13 19:53:20,252 INFO L226 Difference]: Without dead ends: 2320 [2021-07-13 19:53:20,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:53:20,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-07-13 19:53:20,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1919. [2021-07-13 19:53:20,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 4.211157455683003) internal successors, (8077), 1918 states have internal predecessors, (8077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:20,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 8077 transitions. [2021-07-13 19:53:20,287 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 8077 transitions. Word has length 29 [2021-07-13 19:53:20,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:20,287 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 8077 transitions. [2021-07-13 19:53:20,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:20,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 8077 transitions. [2021-07-13 19:53:20,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:20,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:20,291 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:20,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 19:53:20,508 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:20,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:20,508 INFO L82 PathProgramCache]: Analyzing trace with hash -849165682, now seen corresponding path program 15 times [2021-07-13 19:53:20,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:20,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902678376] [2021-07-13 19:53:20,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:20,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:20,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902678376] [2021-07-13 19:53:20,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902678376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:20,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402633862] [2021-07-13 19:53:20,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:20,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:53:20,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:20,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:53:20,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:20,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:20,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:20,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:20,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:20,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:20,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-07-13 19:53:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:20,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402633862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:20,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:20,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:20,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239634795] [2021-07-13 19:53:20,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:20,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:20,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:20,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:20,830 INFO L87 Difference]: Start difference. First operand 1919 states and 8077 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:21,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:21,111 INFO L93 Difference]: Finished difference Result 2310 states and 9540 transitions. [2021-07-13 19:53:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:53:21,111 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:21,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:21,117 INFO L225 Difference]: With dead ends: 2310 [2021-07-13 19:53:21,117 INFO L226 Difference]: Without dead ends: 2287 [2021-07-13 19:53:21,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 269.0ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:53:21,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-07-13 19:53:21,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1872. [2021-07-13 19:53:21,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1871 states have (on average 4.220203099946553) internal successors, (7896), 1871 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:21,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 7896 transitions. [2021-07-13 19:53:21,154 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 7896 transitions. Word has length 29 [2021-07-13 19:53:21,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:21,155 INFO L482 AbstractCegarLoop]: Abstraction has 1872 states and 7896 transitions. [2021-07-13 19:53:21,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:21,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 7896 transitions. [2021-07-13 19:53:21,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:21,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:21,158 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:21,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:21,375 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:21,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:21,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1579819448, now seen corresponding path program 16 times [2021-07-13 19:53:21,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:21,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360788857] [2021-07-13 19:53:21,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:21,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:21,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360788857] [2021-07-13 19:53:21,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360788857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:21,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811767072] [2021-07-13 19:53:21,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:21,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:21,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:21,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:21,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:21,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-13 19:53:21,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:21,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:21,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:21,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 19:53:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:21,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811767072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:21,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:21,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-13 19:53:21,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371766361] [2021-07-13 19:53:21,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:21,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:21,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:21,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:21,636 INFO L87 Difference]: Start difference. First operand 1872 states and 7896 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:22,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:22,294 INFO L93 Difference]: Finished difference Result 2324 states and 9664 transitions. [2021-07-13 19:53:22,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:53:22,295 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:22,301 INFO L225 Difference]: With dead ends: 2324 [2021-07-13 19:53:22,301 INFO L226 Difference]: Without dead ends: 2305 [2021-07-13 19:53:22,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 501.7ms TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:53:22,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-07-13 19:53:22,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1872. [2021-07-13 19:53:22,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1871 states have (on average 4.220203099946553) internal successors, (7896), 1871 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:22,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 7896 transitions. [2021-07-13 19:53:22,342 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 7896 transitions. Word has length 29 [2021-07-13 19:53:22,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:22,342 INFO L482 AbstractCegarLoop]: Abstraction has 1872 states and 7896 transitions. [2021-07-13 19:53:22,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:22,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 7896 transitions. [2021-07-13 19:53:22,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:22,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:22,346 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:22,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 19:53:22,562 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:22,563 INFO L82 PathProgramCache]: Analyzing trace with hash -2143416872, now seen corresponding path program 17 times [2021-07-13 19:53:22,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:22,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652030753] [2021-07-13 19:53:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:22,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:22,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652030753] [2021-07-13 19:53:22,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652030753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:22,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4376534] [2021-07-13 19:53:22,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:22,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:22,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:22,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:22,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:22,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-13 19:53:22,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:22,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:22,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:22,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 19:53:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:22,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4376534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:22,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:22,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-13 19:53:22,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462501616] [2021-07-13 19:53:22,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:22,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:22,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:22,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:22,808 INFO L87 Difference]: Start difference. First operand 1872 states and 7896 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:23,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:23,468 INFO L93 Difference]: Finished difference Result 2792 states and 11337 transitions. [2021-07-13 19:53:23,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:53:23,468 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:23,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:23,475 INFO L225 Difference]: With dead ends: 2792 [2021-07-13 19:53:23,475 INFO L226 Difference]: Without dead ends: 2750 [2021-07-13 19:53:23,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 535.8ms TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:53:23,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2021-07-13 19:53:23,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 1860. [2021-07-13 19:53:23,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 4.2210866057019905) internal successors, (7847), 1859 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:23,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 7847 transitions. [2021-07-13 19:53:23,508 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 7847 transitions. Word has length 29 [2021-07-13 19:53:23,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:23,508 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 7847 transitions. [2021-07-13 19:53:23,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:23,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 7847 transitions. [2021-07-13 19:53:23,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:23,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:23,512 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:23,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 19:53:23,721 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:23,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:23,721 INFO L82 PathProgramCache]: Analyzing trace with hash 312359488, now seen corresponding path program 1 times [2021-07-13 19:53:23,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:23,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021014033] [2021-07-13 19:53:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:23,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:23,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021014033] [2021-07-13 19:53:23,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021014033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:23,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103566052] [2021-07-13 19:53:23,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:23,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:23,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:23,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:23,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:23,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:23,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:23,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-13 19:53:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:23,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103566052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:23,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:23,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 19:53:23,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282762016] [2021-07-13 19:53:23,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:53:23,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:23,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:53:23,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:23,942 INFO L87 Difference]: Start difference. First operand 1860 states and 7847 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:24,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:24,074 INFO L93 Difference]: Finished difference Result 2474 states and 10275 transitions. [2021-07-13 19:53:24,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:53:24,074 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:24,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:24,081 INFO L225 Difference]: With dead ends: 2474 [2021-07-13 19:53:24,081 INFO L226 Difference]: Without dead ends: 2455 [2021-07-13 19:53:24,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:53:24,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-07-13 19:53:24,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 1982. [2021-07-13 19:53:24,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 4.223119636547199) internal successors, (8366), 1981 states have internal predecessors, (8366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:24,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 8366 transitions. [2021-07-13 19:53:24,119 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 8366 transitions. Word has length 29 [2021-07-13 19:53:24,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:24,119 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 8366 transitions. [2021-07-13 19:53:24,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:24,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 8366 transitions. [2021-07-13 19:53:24,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:24,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:24,124 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:24,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:24,337 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:24,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:24,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1734714314, now seen corresponding path program 2 times [2021-07-13 19:53:24,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:24,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216564881] [2021-07-13 19:53:24,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:24,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:24,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216564881] [2021-07-13 19:53:24,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216564881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:24,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516528894] [2021-07-13 19:53:24,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:24,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:24,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:24,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:24,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:24,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:24,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:24,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:24,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:24,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:24,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:53:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:24,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516528894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:24,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:24,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-13 19:53:24,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180177234] [2021-07-13 19:53:24,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:24,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:24,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:24,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:24,637 INFO L87 Difference]: Start difference. First operand 1982 states and 8366 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:25,106 INFO L93 Difference]: Finished difference Result 2637 states and 10901 transitions. [2021-07-13 19:53:25,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:53:25,106 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:25,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:25,112 INFO L225 Difference]: With dead ends: 2637 [2021-07-13 19:53:25,113 INFO L226 Difference]: Without dead ends: 2606 [2021-07-13 19:53:25,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 369.1ms TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:53:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-07-13 19:53:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1919. [2021-07-13 19:53:25,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 4.238269030239834) internal successors, (8129), 1918 states have internal predecessors, (8129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:25,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 8129 transitions. [2021-07-13 19:53:25,151 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 8129 transitions. Word has length 29 [2021-07-13 19:53:25,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:25,151 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 8129 transitions. [2021-07-13 19:53:25,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:25,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 8129 transitions. [2021-07-13 19:53:25,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:25,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:25,155 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:25,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 19:53:25,373 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:25,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:25,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1773592538, now seen corresponding path program 3 times [2021-07-13 19:53:25,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:25,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318754287] [2021-07-13 19:53:25,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:25,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:25,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318754287] [2021-07-13 19:53:25,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318754287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:25,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942853036] [2021-07-13 19:53:25,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:25,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:53:25,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:25,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:53:25,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:25,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:25,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:25,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:25,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:25,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:25,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-07-13 19:53:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:25,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942853036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:25,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:25,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:53:25,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871851669] [2021-07-13 19:53:25,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:53:25,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:25,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:53:25,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:53:25,651 INFO L87 Difference]: Start difference. First operand 1919 states and 8129 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:26,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:26,147 INFO L93 Difference]: Finished difference Result 2442 states and 10230 transitions. [2021-07-13 19:53:26,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:53:26,147 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:26,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:26,154 INFO L225 Difference]: With dead ends: 2442 [2021-07-13 19:53:26,154 INFO L226 Difference]: Without dead ends: 2427 [2021-07-13 19:53:26,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 397.2ms TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:53:26,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-07-13 19:53:26,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 1904. [2021-07-13 19:53:26,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1903 states have (on average 4.242249080399369) internal successors, (8073), 1903 states have internal predecessors, (8073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 8073 transitions. [2021-07-13 19:53:26,185 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 8073 transitions. Word has length 29 [2021-07-13 19:53:26,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:26,185 INFO L482 AbstractCegarLoop]: Abstraction has 1904 states and 8073 transitions. [2021-07-13 19:53:26,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:26,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 8073 transitions. [2021-07-13 19:53:26,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:26,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:26,189 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:26,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:26,390 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:26,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:26,390 INFO L82 PathProgramCache]: Analyzing trace with hash 409541884, now seen corresponding path program 4 times [2021-07-13 19:53:26,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:26,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686416607] [2021-07-13 19:53:26,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:26,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:26,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686416607] [2021-07-13 19:53:26,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686416607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:26,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947858089] [2021-07-13 19:53:26,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:26,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:26,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:26,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:26,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:26,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:26,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:53:26,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:26,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:26,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:26,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-07-13 19:53:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:26,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947858089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:26,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:26,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 19:53:26,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611443042] [2021-07-13 19:53:26,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:53:26,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:26,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:53:26,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:26,609 INFO L87 Difference]: Start difference. First operand 1904 states and 8073 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:26,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:26,745 INFO L93 Difference]: Finished difference Result 2559 states and 10558 transitions. [2021-07-13 19:53:26,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:53:26,745 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:26,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:26,751 INFO L225 Difference]: With dead ends: 2559 [2021-07-13 19:53:26,751 INFO L226 Difference]: Without dead ends: 2540 [2021-07-13 19:53:26,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:53:26,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2021-07-13 19:53:26,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2008. [2021-07-13 19:53:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 4.241155954160439) internal successors, (8512), 2007 states have internal predecessors, (8512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:26,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 8512 transitions. [2021-07-13 19:53:26,784 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 8512 transitions. Word has length 29 [2021-07-13 19:53:26,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:26,784 INFO L482 AbstractCegarLoop]: Abstraction has 2008 states and 8512 transitions. [2021-07-13 19:53:26,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:26,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 8512 transitions. [2021-07-13 19:53:26,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:26,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:26,789 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:26,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 19:53:26,997 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:26,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:26,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1831896710, now seen corresponding path program 5 times [2021-07-13 19:53:26,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:26,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353298706] [2021-07-13 19:53:26,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:27,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:27,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353298706] [2021-07-13 19:53:27,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353298706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:27,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280295226] [2021-07-13 19:53:27,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:27,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:53:27,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:27,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:27,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:27,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:27,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:27,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:27,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:27,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-13 19:53:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:27,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280295226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:27,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:27,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:53:27,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340958944] [2021-07-13 19:53:27,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:53:27,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:27,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:53:27,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:53:27,210 INFO L87 Difference]: Start difference. First operand 2008 states and 8512 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:27,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:27,336 INFO L93 Difference]: Finished difference Result 2517 states and 10450 transitions. [2021-07-13 19:53:27,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:53:27,337 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:27,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:27,343 INFO L225 Difference]: With dead ends: 2517 [2021-07-13 19:53:27,343 INFO L226 Difference]: Without dead ends: 2486 [2021-07-13 19:53:27,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:27,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-07-13 19:53:27,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1928. [2021-07-13 19:53:27,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 4.242345614945511) internal successors, (8175), 1927 states have internal predecessors, (8175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:27,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 8175 transitions. [2021-07-13 19:53:27,381 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 8175 transitions. Word has length 29 [2021-07-13 19:53:27,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:27,381 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 8175 transitions. [2021-07-13 19:53:27,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:27,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 8175 transitions. [2021-07-13 19:53:27,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:27,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:27,386 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:27,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 19:53:27,586 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:27,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:27,586 INFO L82 PathProgramCache]: Analyzing trace with hash -768158788, now seen corresponding path program 6 times [2021-07-13 19:53:27,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:27,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037445116] [2021-07-13 19:53:27,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:27,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:27,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037445116] [2021-07-13 19:53:27,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037445116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:27,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238258112] [2021-07-13 19:53:27,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:27,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:53:27,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:27,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:27,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:27,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:27,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:27,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:27,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:27,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:27,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:53:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:27,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238258112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:27,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:27,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:53:27,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54949956] [2021-07-13 19:53:27,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:53:27,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:27,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:53:27,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:53:27,895 INFO L87 Difference]: Start difference. First operand 1928 states and 8175 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:28,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:28,416 INFO L93 Difference]: Finished difference Result 2183 states and 9102 transitions. [2021-07-13 19:53:28,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:53:28,417 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:28,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:28,422 INFO L225 Difference]: With dead ends: 2183 [2021-07-13 19:53:28,422 INFO L226 Difference]: Without dead ends: 2164 [2021-07-13 19:53:28,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 397.8ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:53:28,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2021-07-13 19:53:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 1916. [2021-07-13 19:53:28,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1915 states have (on average 4.246997389033942) internal successors, (8133), 1915 states have internal predecessors, (8133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 8133 transitions. [2021-07-13 19:53:28,454 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 8133 transitions. Word has length 29 [2021-07-13 19:53:28,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:28,454 INFO L482 AbstractCegarLoop]: Abstraction has 1916 states and 8133 transitions. [2021-07-13 19:53:28,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:28,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 8133 transitions. [2021-07-13 19:53:28,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:28,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:28,458 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:28,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:28,674 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:28,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:28,674 INFO L82 PathProgramCache]: Analyzing trace with hash 783680366, now seen corresponding path program 7 times [2021-07-13 19:53:28,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:28,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69248091] [2021-07-13 19:53:28,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:28,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:28,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69248091] [2021-07-13 19:53:28,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69248091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:28,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126042862] [2021-07-13 19:53:28,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:28,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:28,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:28,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:28,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:28,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:28,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:28,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-13 19:53:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:28,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126042862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:28,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:28,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:53:28,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989750879] [2021-07-13 19:53:28,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:53:28,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:28,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:53:28,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:53:28,913 INFO L87 Difference]: Start difference. First operand 1916 states and 8133 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:29,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:29,103 INFO L93 Difference]: Finished difference Result 2667 states and 11011 transitions. [2021-07-13 19:53:29,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:53:29,104 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:29,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:29,111 INFO L225 Difference]: With dead ends: 2667 [2021-07-13 19:53:29,111 INFO L226 Difference]: Without dead ends: 2648 [2021-07-13 19:53:29,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:53:29,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-07-13 19:53:29,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2028. [2021-07-13 19:53:29,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 4.24173655648742) internal successors, (8598), 2027 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:29,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 8598 transitions. [2021-07-13 19:53:29,151 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 8598 transitions. Word has length 29 [2021-07-13 19:53:29,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:29,151 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 8598 transitions. [2021-07-13 19:53:29,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:29,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 8598 transitions. [2021-07-13 19:53:29,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:29,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:29,155 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:29,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:29,365 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:29,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:29,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2088932104, now seen corresponding path program 8 times [2021-07-13 19:53:29,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:29,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596696385] [2021-07-13 19:53:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:29,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:29,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596696385] [2021-07-13 19:53:29,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596696385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:29,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97524794] [2021-07-13 19:53:29,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:29,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:29,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:29,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:29,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:29,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:29,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-07-13 19:53:29,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:29,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:29,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:29,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-13 19:53:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:29,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97524794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:29,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:29,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-13 19:53:29,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024911962] [2021-07-13 19:53:29,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:29,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:29,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:29,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:29,658 INFO L87 Difference]: Start difference. First operand 2028 states and 8598 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:30,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:30,226 INFO L93 Difference]: Finished difference Result 2896 states and 11879 transitions. [2021-07-13 19:53:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:53:30,227 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:30,234 INFO L225 Difference]: With dead ends: 2896 [2021-07-13 19:53:30,234 INFO L226 Difference]: Without dead ends: 2852 [2021-07-13 19:53:30,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 421.5ms TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:53:30,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-07-13 19:53:30,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 1948. [2021-07-13 19:53:30,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 4.242937853107344) internal successors, (8261), 1947 states have internal predecessors, (8261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:30,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 8261 transitions. [2021-07-13 19:53:30,283 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 8261 transitions. Word has length 29 [2021-07-13 19:53:30,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:30,284 INFO L482 AbstractCegarLoop]: Abstraction has 1948 states and 8261 transitions. [2021-07-13 19:53:30,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:30,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 8261 transitions. [2021-07-13 19:53:30,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:30,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:30,287 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:30,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-13 19:53:30,488 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:30,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:30,488 INFO L82 PathProgramCache]: Analyzing trace with hash -394020306, now seen corresponding path program 9 times [2021-07-13 19:53:30,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:30,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475821977] [2021-07-13 19:53:30,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:30,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:30,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475821977] [2021-07-13 19:53:30,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475821977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:30,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167452491] [2021-07-13 19:53:30,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:30,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:53:30,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:30,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:30,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:30,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:30,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-07-13 19:53:30,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:30,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:30,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:30,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-13 19:53:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:30,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167452491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:30,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:30,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:53:30,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715274249] [2021-07-13 19:53:30,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:53:30,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:30,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:53:30,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:53:30,782 INFO L87 Difference]: Start difference. First operand 1948 states and 8261 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:31,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:31,333 INFO L93 Difference]: Finished difference Result 2330 states and 9645 transitions. [2021-07-13 19:53:31,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:53:31,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:31,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:31,338 INFO L225 Difference]: With dead ends: 2330 [2021-07-13 19:53:31,338 INFO L226 Difference]: Without dead ends: 2311 [2021-07-13 19:53:31,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 451.0ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:53:31,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2021-07-13 19:53:31,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 1924. [2021-07-13 19:53:31,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 4.2428497139885595) internal successors, (8159), 1923 states have internal predecessors, (8159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:31,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 8159 transitions. [2021-07-13 19:53:31,368 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 8159 transitions. Word has length 29 [2021-07-13 19:53:31,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:31,368 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 8159 transitions. [2021-07-13 19:53:31,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:31,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 8159 transitions. [2021-07-13 19:53:31,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:31,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:31,372 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:31,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:31,573 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:31,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1761581676, now seen corresponding path program 10 times [2021-07-13 19:53:31,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:31,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085292823] [2021-07-13 19:53:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:31,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:31,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085292823] [2021-07-13 19:53:31,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085292823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:31,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241767154] [2021-07-13 19:53:31,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:31,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:31,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:31,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:31,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:31,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 19:53:31,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:31,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:31,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:31,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-07-13 19:53:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:31,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241767154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:31,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:31,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 19:53:31,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631700141] [2021-07-13 19:53:31,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:53:31,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:31,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:53:31,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:31,803 INFO L87 Difference]: Start difference. First operand 1924 states and 8159 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:31,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:31,987 INFO L93 Difference]: Finished difference Result 2053 states and 8574 transitions. [2021-07-13 19:53:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:53:31,987 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:31,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:31,992 INFO L225 Difference]: With dead ends: 2053 [2021-07-13 19:53:31,992 INFO L226 Difference]: Without dead ends: 2034 [2021-07-13 19:53:31,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:31,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-07-13 19:53:32,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1927. [2021-07-13 19:53:32,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1926 states have (on average 4.238836967808931) internal successors, (8164), 1926 states have internal predecessors, (8164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:32,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 8164 transitions. [2021-07-13 19:53:32,021 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 8164 transitions. Word has length 29 [2021-07-13 19:53:32,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:32,021 INFO L482 AbstractCegarLoop]: Abstraction has 1927 states and 8164 transitions. [2021-07-13 19:53:32,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:32,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 8164 transitions. [2021-07-13 19:53:32,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:32,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:32,025 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:32,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 19:53:32,225 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:32,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:32,226 INFO L82 PathProgramCache]: Analyzing trace with hash -81335312, now seen corresponding path program 18 times [2021-07-13 19:53:32,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:32,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129703461] [2021-07-13 19:53:32,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:32,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:32,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129703461] [2021-07-13 19:53:32,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129703461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:32,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963188370] [2021-07-13 19:53:32,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:32,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:53:32,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:32,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:32,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:32,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:32,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-07-13 19:53:32,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:32,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:32,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:32,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-13 19:53:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:32,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963188370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:32,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:32,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:32,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920769800] [2021-07-13 19:53:32,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:32,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:32,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:32,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:32,521 INFO L87 Difference]: Start difference. First operand 1927 states and 8164 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:33,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:33,131 INFO L93 Difference]: Finished difference Result 2627 states and 10950 transitions. [2021-07-13 19:53:33,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:53:33,131 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:33,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:33,138 INFO L225 Difference]: With dead ends: 2627 [2021-07-13 19:53:33,138 INFO L226 Difference]: Without dead ends: 2608 [2021-07-13 19:53:33,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 534.7ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:53:33,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-07-13 19:53:33,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2057. [2021-07-13 19:53:33,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 4.261186770428016) internal successors, (8761), 2056 states have internal predecessors, (8761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 8761 transitions. [2021-07-13 19:53:33,170 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 8761 transitions. Word has length 29 [2021-07-13 19:53:33,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:33,170 INFO L482 AbstractCegarLoop]: Abstraction has 2057 states and 8761 transitions. [2021-07-13 19:53:33,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:33,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 8761 transitions. [2021-07-13 19:53:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:33,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:33,174 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:33,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 19:53:33,379 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:33,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:33,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1221937294, now seen corresponding path program 19 times [2021-07-13 19:53:33,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:33,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170746739] [2021-07-13 19:53:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:33,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:33,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170746739] [2021-07-13 19:53:33,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170746739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:33,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894551739] [2021-07-13 19:53:33,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:33,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:53:33,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:33,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:53:33,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:33,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:33,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:33,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:25 [2021-07-13 19:53:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:33,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894551739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:33,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:33,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:33,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782829678] [2021-07-13 19:53:33,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:33,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:33,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:33,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:33,673 INFO L87 Difference]: Start difference. First operand 2057 states and 8761 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:34,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:34,164 INFO L93 Difference]: Finished difference Result 2726 states and 11138 transitions. [2021-07-13 19:53:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:53:34,165 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:34,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:34,171 INFO L225 Difference]: With dead ends: 2726 [2021-07-13 19:53:34,171 INFO L226 Difference]: Without dead ends: 2676 [2021-07-13 19:53:34,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 365.1ms TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:53:34,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-07-13 19:53:34,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2133. [2021-07-13 19:53:34,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2133 states, 2132 states have (on average 4.25984990619137) internal successors, (9082), 2132 states have internal predecessors, (9082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:34,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 9082 transitions. [2021-07-13 19:53:34,209 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 9082 transitions. Word has length 29 [2021-07-13 19:53:34,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:34,209 INFO L482 AbstractCegarLoop]: Abstraction has 2133 states and 9082 transitions. [2021-07-13 19:53:34,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:34,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 9082 transitions. [2021-07-13 19:53:34,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:34,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:34,214 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:34,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 19:53:34,415 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:34,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:34,415 INFO L82 PathProgramCache]: Analyzing trace with hash -446456148, now seen corresponding path program 20 times [2021-07-13 19:53:34,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:34,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259931820] [2021-07-13 19:53:34,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:34,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:34,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259931820] [2021-07-13 19:53:34,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259931820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:34,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854191679] [2021-07-13 19:53:34,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:34,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:34,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:34,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:34,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:34,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:34,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-07-13 19:53:34,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:34,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:34,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:34,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-13 19:53:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:34,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854191679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:34,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:34,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:34,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210194475] [2021-07-13 19:53:34,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:34,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:34,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:34,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:34,752 INFO L87 Difference]: Start difference. First operand 2133 states and 9082 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:35,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:35,254 INFO L93 Difference]: Finished difference Result 2572 states and 10732 transitions. [2021-07-13 19:53:35,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:53:35,254 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:35,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:35,261 INFO L225 Difference]: With dead ends: 2572 [2021-07-13 19:53:35,261 INFO L226 Difference]: Without dead ends: 2554 [2021-07-13 19:53:35,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 468.2ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:53:35,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-07-13 19:53:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2126. [2021-07-13 19:53:35,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 4.264941176470588) internal successors, (9063), 2125 states have internal predecessors, (9063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 9063 transitions. [2021-07-13 19:53:35,296 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 9063 transitions. Word has length 29 [2021-07-13 19:53:35,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:35,296 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 9063 transitions. [2021-07-13 19:53:35,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:35,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 9063 transitions. [2021-07-13 19:53:35,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:35,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:35,300 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:35,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 19:53:35,501 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:35,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:35,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1168550774, now seen corresponding path program 21 times [2021-07-13 19:53:35,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:35,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709794231] [2021-07-13 19:53:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:35,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:35,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709794231] [2021-07-13 19:53:35,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709794231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:35,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649027553] [2021-07-13 19:53:35,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:35,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:53:35,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:35,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:35,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:35,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:35,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-07-13 19:53:35,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:35,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:35,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:35,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-13 19:53:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:35,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649027553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:35,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:35,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:35,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493050320] [2021-07-13 19:53:35,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:35,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:35,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:35,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:35,821 INFO L87 Difference]: Start difference. First operand 2126 states and 9063 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:36,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:36,369 INFO L93 Difference]: Finished difference Result 2581 states and 10762 transitions. [2021-07-13 19:53:36,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:53:36,370 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:36,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:36,376 INFO L225 Difference]: With dead ends: 2581 [2021-07-13 19:53:36,376 INFO L226 Difference]: Without dead ends: 2542 [2021-07-13 19:53:36,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 495.7ms TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:53:36,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-07-13 19:53:36,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2101. [2021-07-13 19:53:36,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2100 states have (on average 4.27) internal successors, (8967), 2100 states have internal predecessors, (8967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:36,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 8967 transitions. [2021-07-13 19:53:36,409 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 8967 transitions. Word has length 29 [2021-07-13 19:53:36,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:36,409 INFO L482 AbstractCegarLoop]: Abstraction has 2101 states and 8967 transitions. [2021-07-13 19:53:36,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:36,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 8967 transitions. [2021-07-13 19:53:36,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:36,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:36,413 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:36,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 19:53:36,614 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:36,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:36,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1063587426, now seen corresponding path program 22 times [2021-07-13 19:53:36,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:36,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307445640] [2021-07-13 19:53:36,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:36,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:36,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307445640] [2021-07-13 19:53:36,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307445640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:36,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494274204] [2021-07-13 19:53:36,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:36,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:36,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:36,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:53:36,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:36,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:53:36,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:36,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:36,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:36,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:25 [2021-07-13 19:53:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:36,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494274204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:36,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:36,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:36,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300484356] [2021-07-13 19:53:36,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:36,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:36,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:36,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:36,931 INFO L87 Difference]: Start difference. First operand 2101 states and 8967 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:37,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:37,453 INFO L93 Difference]: Finished difference Result 2477 states and 10397 transitions. [2021-07-13 19:53:37,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:53:37,453 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:37,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:37,460 INFO L225 Difference]: With dead ends: 2477 [2021-07-13 19:53:37,460 INFO L226 Difference]: Without dead ends: 2433 [2021-07-13 19:53:37,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 457.8ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:53:37,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-07-13 19:53:37,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 2104. [2021-07-13 19:53:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 4.266761768901569) internal successors, (8973), 2103 states have internal predecessors, (8973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:37,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 8973 transitions. [2021-07-13 19:53:37,495 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 8973 transitions. Word has length 29 [2021-07-13 19:53:37,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:37,495 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 8973 transitions. [2021-07-13 19:53:37,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:37,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 8973 transitions. [2021-07-13 19:53:37,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:37,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:37,499 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:37,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 19:53:37,713 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:37,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:37,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1021005372, now seen corresponding path program 23 times [2021-07-13 19:53:37,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:37,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656745771] [2021-07-13 19:53:37,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:37,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:37,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656745771] [2021-07-13 19:53:37,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656745771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:37,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658225865] [2021-07-13 19:53:37,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:37,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:37,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:37,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:53:37,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:37,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-07-13 19:53:37,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:37,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:37,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:37,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:20 [2021-07-13 19:53:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:38,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658225865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:38,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:38,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-13 19:53:38,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728156069] [2021-07-13 19:53:38,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:53:38,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:38,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:53:38,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:38,017 INFO L87 Difference]: Start difference. First operand 2104 states and 8973 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:38,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:38,413 INFO L93 Difference]: Finished difference Result 2516 states and 10534 transitions. [2021-07-13 19:53:38,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:53:38,413 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:38,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:38,419 INFO L225 Difference]: With dead ends: 2516 [2021-07-13 19:53:38,419 INFO L226 Difference]: Without dead ends: 2502 [2021-07-13 19:53:38,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 337.0ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:53:38,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2021-07-13 19:53:38,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 2094. [2021-07-13 19:53:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 4.272336359292881) internal successors, (8942), 2093 states have internal predecessors, (8942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 8942 transitions. [2021-07-13 19:53:38,465 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 8942 transitions. Word has length 29 [2021-07-13 19:53:38,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:38,465 INFO L482 AbstractCegarLoop]: Abstraction has 2094 states and 8942 transitions. [2021-07-13 19:53:38,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:38,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 8942 transitions. [2021-07-13 19:53:38,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:38,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:38,469 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:38,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 19:53:38,669 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:38,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:38,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1011868340, now seen corresponding path program 24 times [2021-07-13 19:53:38,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:38,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740534696] [2021-07-13 19:53:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:38,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:38,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740534696] [2021-07-13 19:53:38,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740534696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:38,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259458935] [2021-07-13 19:53:38,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:38,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:53:38,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:38,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:38,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:38,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:38,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-07-13 19:53:38,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:38,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:38,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:38,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-07-13 19:53:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:39,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259458935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:39,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:39,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:39,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953948372] [2021-07-13 19:53:39,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:39,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:39,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:39,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:39,012 INFO L87 Difference]: Start difference. First operand 2094 states and 8942 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:39,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:39,409 INFO L93 Difference]: Finished difference Result 2299 states and 9721 transitions. [2021-07-13 19:53:39,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:53:39,409 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:39,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:39,415 INFO L225 Difference]: With dead ends: 2299 [2021-07-13 19:53:39,415 INFO L226 Difference]: Without dead ends: 2284 [2021-07-13 19:53:39,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 407.9ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:53:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-07-13 19:53:39,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 2106. [2021-07-13 19:53:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 2105 states have (on average 4.263182897862233) internal successors, (8974), 2105 states have internal predecessors, (8974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:39,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 8974 transitions. [2021-07-13 19:53:39,447 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 8974 transitions. Word has length 29 [2021-07-13 19:53:39,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:39,447 INFO L482 AbstractCegarLoop]: Abstraction has 2106 states and 8974 transitions. [2021-07-13 19:53:39,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 8974 transitions. [2021-07-13 19:53:39,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:39,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:39,451 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:39,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:39,665 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:39,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:39,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1867952308, now seen corresponding path program 25 times [2021-07-13 19:53:39,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:39,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608910697] [2021-07-13 19:53:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:39,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:39,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608910697] [2021-07-13 19:53:39,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608910697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:39,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491604582] [2021-07-13 19:53:39,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:39,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:53:39,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:39,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:39,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:39,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:39,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:39,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-07-13 19:53:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:40,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491604582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:40,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:40,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:40,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193736063] [2021-07-13 19:53:40,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:40,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:40,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:40,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:40,015 INFO L87 Difference]: Start difference. First operand 2106 states and 8974 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:40,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:40,879 INFO L93 Difference]: Finished difference Result 3202 states and 13180 transitions. [2021-07-13 19:53:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:53:40,880 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:40,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:40,888 INFO L225 Difference]: With dead ends: 3202 [2021-07-13 19:53:40,888 INFO L226 Difference]: Without dead ends: 3152 [2021-07-13 19:53:40,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 680.7ms TimeCoverageRelationStatistics Valid=348, Invalid=1458, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:53:40,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2021-07-13 19:53:40,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 2285. [2021-07-13 19:53:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 2284 states have (on average 4.270140105078809) internal successors, (9753), 2284 states have internal predecessors, (9753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 9753 transitions. [2021-07-13 19:53:40,932 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 9753 transitions. Word has length 29 [2021-07-13 19:53:40,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:40,932 INFO L482 AbstractCegarLoop]: Abstraction has 2285 states and 9753 transitions. [2021-07-13 19:53:40,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:40,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 9753 transitions. [2021-07-13 19:53:40,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:40,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:40,936 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:41,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:41,152 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:41,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1123742382, now seen corresponding path program 26 times [2021-07-13 19:53:41,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:41,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657284546] [2021-07-13 19:53:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:41,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:41,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657284546] [2021-07-13 19:53:41,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657284546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:41,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363444559] [2021-07-13 19:53:41,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:41,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:41,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:41,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:41,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:41,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:41,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:41,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:41,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:41,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:41,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:53:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:41,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363444559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:41,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:41,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:41,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322892790] [2021-07-13 19:53:41,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:41,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:41,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:41,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:41,449 INFO L87 Difference]: Start difference. First operand 2285 states and 9753 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:41,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:41,976 INFO L93 Difference]: Finished difference Result 2667 states and 11189 transitions. [2021-07-13 19:53:41,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:53:41,977 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:41,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:41,983 INFO L225 Difference]: With dead ends: 2667 [2021-07-13 19:53:41,983 INFO L226 Difference]: Without dead ends: 2650 [2021-07-13 19:53:41,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 487.2ms TimeCoverageRelationStatistics Valid=268, Invalid=922, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:53:41,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-07-13 19:53:42,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2278. [2021-07-13 19:53:42,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2277 states have (on average 4.274923144488362) internal successors, (9734), 2277 states have internal predecessors, (9734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 9734 transitions. [2021-07-13 19:53:42,018 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 9734 transitions. Word has length 29 [2021-07-13 19:53:42,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:42,019 INFO L482 AbstractCegarLoop]: Abstraction has 2278 states and 9734 transitions. [2021-07-13 19:53:42,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:42,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 9734 transitions. [2021-07-13 19:53:42,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:42,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:42,023 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:42,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:42,223 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:42,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:42,223 INFO L82 PathProgramCache]: Analyzing trace with hash -2023104454, now seen corresponding path program 27 times [2021-07-13 19:53:42,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:42,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689815174] [2021-07-13 19:53:42,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:42,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:42,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689815174] [2021-07-13 19:53:42,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689815174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:42,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116101940] [2021-07-13 19:53:42,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:42,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:53:42,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:42,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:42,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:42,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:42,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:42,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:42,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:42,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:42,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:53:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:42,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116101940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:42,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:42,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:42,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960873934] [2021-07-13 19:53:42,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:42,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:42,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:42,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:42,530 INFO L87 Difference]: Start difference. First operand 2278 states and 9734 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:43,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:43,317 INFO L93 Difference]: Finished difference Result 2794 states and 11689 transitions. [2021-07-13 19:53:43,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:53:43,317 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:43,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:43,324 INFO L225 Difference]: With dead ends: 2794 [2021-07-13 19:53:43,324 INFO L226 Difference]: Without dead ends: 2771 [2021-07-13 19:53:43,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 695.8ms TimeCoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:53:43,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2021-07-13 19:53:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 2273. [2021-07-13 19:53:43,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2273 states, 2272 states have (on average 4.276848591549296) internal successors, (9717), 2272 states have internal predecessors, (9717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2273 states to 2273 states and 9717 transitions. [2021-07-13 19:53:43,367 INFO L78 Accepts]: Start accepts. Automaton has 2273 states and 9717 transitions. Word has length 29 [2021-07-13 19:53:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:43,367 INFO L482 AbstractCegarLoop]: Abstraction has 2273 states and 9717 transitions. [2021-07-13 19:53:43,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:43,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2273 states and 9717 transitions. [2021-07-13 19:53:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:43,371 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:43,371 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:43,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-13 19:53:43,572 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:43,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:43,572 INFO L82 PathProgramCache]: Analyzing trace with hash 491264540, now seen corresponding path program 28 times [2021-07-13 19:53:43,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:43,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625727438] [2021-07-13 19:53:43,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:43,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:43,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625727438] [2021-07-13 19:53:43,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625727438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:43,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670304695] [2021-07-13 19:53:43,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:43,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:43,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:43,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:53:43,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:43,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:43,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:43,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:43,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:43,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-07-13 19:53:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:43,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670304695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:43,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:43,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:43,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93967499] [2021-07-13 19:53:43,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:43,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:43,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:43,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:43,866 INFO L87 Difference]: Start difference. First operand 2273 states and 9717 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:44,498 INFO L93 Difference]: Finished difference Result 2905 states and 11942 transitions. [2021-07-13 19:53:44,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:53:44,498 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:44,507 INFO L225 Difference]: With dead ends: 2905 [2021-07-13 19:53:44,507 INFO L226 Difference]: Without dead ends: 2849 [2021-07-13 19:53:44,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 466.3ms TimeCoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:53:44,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2021-07-13 19:53:44,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2209. [2021-07-13 19:53:44,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 4.294384057971015) internal successors, (9482), 2208 states have internal predecessors, (9482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:44,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 9482 transitions. [2021-07-13 19:53:44,554 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 9482 transitions. Word has length 29 [2021-07-13 19:53:44,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:44,555 INFO L482 AbstractCegarLoop]: Abstraction has 2209 states and 9482 transitions. [2021-07-13 19:53:44,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:44,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 9482 transitions. [2021-07-13 19:53:44,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:44,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:44,559 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:44,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:44,775 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:44,775 INFO L82 PathProgramCache]: Analyzing trace with hash 885700194, now seen corresponding path program 29 times [2021-07-13 19:53:44,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:44,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144334061] [2021-07-13 19:53:44,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:44,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:44,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144334061] [2021-07-13 19:53:44,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144334061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:44,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52510335] [2021-07-13 19:53:44,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:44,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:44,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:44,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:44,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:44,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-13 19:53:44,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:44,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:44,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:44,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 19:53:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:45,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52510335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:45,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:45,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-13 19:53:45,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280372901] [2021-07-13 19:53:45,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:45,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:45,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:45,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:45,035 INFO L87 Difference]: Start difference. First operand 2209 states and 9482 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:45,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:45,559 INFO L93 Difference]: Finished difference Result 2491 states and 10584 transitions. [2021-07-13 19:53:45,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:53:45,559 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:45,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:45,565 INFO L225 Difference]: With dead ends: 2491 [2021-07-13 19:53:45,565 INFO L226 Difference]: Without dead ends: 2476 [2021-07-13 19:53:45,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 439.4ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:53:45,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-07-13 19:53:45,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 2206. [2021-07-13 19:53:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 4.295691609977324) internal successors, (9472), 2205 states have internal predecessors, (9472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 9472 transitions. [2021-07-13 19:53:45,598 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 9472 transitions. Word has length 29 [2021-07-13 19:53:45,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:45,598 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 9472 transitions. [2021-07-13 19:53:45,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:45,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 9472 transitions. [2021-07-13 19:53:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:45,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:45,602 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:45,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:45,803 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:45,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:45,803 INFO L82 PathProgramCache]: Analyzing trace with hash -163072208, now seen corresponding path program 30 times [2021-07-13 19:53:45,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:45,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807605389] [2021-07-13 19:53:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:45,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:45,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807605389] [2021-07-13 19:53:45,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807605389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:45,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031081690] [2021-07-13 19:53:45,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:45,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:53:45,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:45,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:45,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:45,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:45,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:45,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:45,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:45,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:45,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:53:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:46,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031081690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:46,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:46,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:46,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721729404] [2021-07-13 19:53:46,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:46,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:46,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:46,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:46,124 INFO L87 Difference]: Start difference. First operand 2206 states and 9472 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:46,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:46,859 INFO L93 Difference]: Finished difference Result 2860 states and 11959 transitions. [2021-07-13 19:53:46,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:53:46,859 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:46,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:46,866 INFO L225 Difference]: With dead ends: 2860 [2021-07-13 19:53:46,866 INFO L226 Difference]: Without dead ends: 2841 [2021-07-13 19:53:46,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 653.5ms TimeCoverageRelationStatistics Valid=260, Invalid=1146, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:53:46,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-07-13 19:53:46,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 2276. [2021-07-13 19:53:46,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 4.304175824175824) internal successors, (9792), 2275 states have internal predecessors, (9792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 9792 transitions. [2021-07-13 19:53:46,903 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 9792 transitions. Word has length 29 [2021-07-13 19:53:46,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:46,903 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 9792 transitions. [2021-07-13 19:53:46,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 9792 transitions. [2021-07-13 19:53:46,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:46,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:46,909 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:47,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 19:53:47,125 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:47,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:47,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1140200398, now seen corresponding path program 31 times [2021-07-13 19:53:47,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:47,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434161309] [2021-07-13 19:53:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:47,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:47,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434161309] [2021-07-13 19:53:47,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434161309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:47,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217872810] [2021-07-13 19:53:47,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:47,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:53:47,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:47,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:47,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:47,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:47,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:47,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-07-13 19:53:47,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:47,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217872810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:47,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:47,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:47,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305090519] [2021-07-13 19:53:47,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:47,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:47,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:47,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:47,415 INFO L87 Difference]: Start difference. First operand 2276 states and 9792 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:47,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:47,944 INFO L93 Difference]: Finished difference Result 3077 states and 12673 transitions. [2021-07-13 19:53:47,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:53:47,945 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:47,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:47,952 INFO L225 Difference]: With dead ends: 3077 [2021-07-13 19:53:47,952 INFO L226 Difference]: Without dead ends: 3033 [2021-07-13 19:53:47,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 425.2ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:53:47,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3033 states. [2021-07-13 19:53:47,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3033 to 2293. [2021-07-13 19:53:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2292 states have (on average 4.287085514834206) internal successors, (9826), 2292 states have internal predecessors, (9826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:47,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 9826 transitions. [2021-07-13 19:53:47,991 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 9826 transitions. Word has length 29 [2021-07-13 19:53:47,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:47,991 INFO L482 AbstractCegarLoop]: Abstraction has 2293 states and 9826 transitions. [2021-07-13 19:53:47,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:47,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 9826 transitions. [2021-07-13 19:53:47,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:47,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:47,995 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:48,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 19:53:48,196 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:48,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:48,196 INFO L82 PathProgramCache]: Analyzing trace with hash -528193044, now seen corresponding path program 32 times [2021-07-13 19:53:48,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:48,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244094057] [2021-07-13 19:53:48,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:48,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:48,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:48,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244094057] [2021-07-13 19:53:48,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244094057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:48,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795991250] [2021-07-13 19:53:48,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:48,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:48,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:48,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:48,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:48,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:48,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:48,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:48,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:48,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:48,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:53:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:48,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795991250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:48,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:48,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:48,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640467587] [2021-07-13 19:53:48,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:48,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:48,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:48,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:48,536 INFO L87 Difference]: Start difference. First operand 2293 states and 9826 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:49,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:49,164 INFO L93 Difference]: Finished difference Result 2719 states and 11375 transitions. [2021-07-13 19:53:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:53:49,164 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:49,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:49,171 INFO L225 Difference]: With dead ends: 2719 [2021-07-13 19:53:49,171 INFO L226 Difference]: Without dead ends: 2701 [2021-07-13 19:53:49,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 602.5ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:53:49,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-07-13 19:53:49,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2286. [2021-07-13 19:53:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2285 states have (on average 4.291903719912472) internal successors, (9807), 2285 states have internal predecessors, (9807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 9807 transitions. [2021-07-13 19:53:49,209 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 9807 transitions. Word has length 29 [2021-07-13 19:53:49,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:49,209 INFO L482 AbstractCegarLoop]: Abstraction has 2286 states and 9807 transitions. [2021-07-13 19:53:49,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:49,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 9807 transitions. [2021-07-13 19:53:49,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:49,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:49,213 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:49,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 19:53:49,413 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:49,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:49,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1086813878, now seen corresponding path program 33 times [2021-07-13 19:53:49,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:49,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172760893] [2021-07-13 19:53:49,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:49,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:49,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172760893] [2021-07-13 19:53:49,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172760893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:49,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643272602] [2021-07-13 19:53:49,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:49,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:53:49,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:49,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:49,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:49,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:49,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:49,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:49,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:49,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:49,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:53:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:49,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643272602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:49,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:49,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:49,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880117656] [2021-07-13 19:53:49,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:49,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:49,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:49,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:49,700 INFO L87 Difference]: Start difference. First operand 2286 states and 9807 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:50,315 INFO L93 Difference]: Finished difference Result 2691 states and 11318 transitions. [2021-07-13 19:53:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:53:50,316 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:50,322 INFO L225 Difference]: With dead ends: 2691 [2021-07-13 19:53:50,323 INFO L226 Difference]: Without dead ends: 2652 [2021-07-13 19:53:50,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 553.0ms TimeCoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:53:50,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-07-13 19:53:50,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2230. [2021-07-13 19:53:50,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 4.293405114401077) internal successors, (9570), 2229 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 9570 transitions. [2021-07-13 19:53:50,374 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 9570 transitions. Word has length 29 [2021-07-13 19:53:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:50,374 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 9570 transitions. [2021-07-13 19:53:50,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:50,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 9570 transitions. [2021-07-13 19:53:50,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:50,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:50,378 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:50,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:50,579 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:50,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:50,579 INFO L82 PathProgramCache]: Analyzing trace with hash 356160112, now seen corresponding path program 34 times [2021-07-13 19:53:50,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:50,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444506316] [2021-07-13 19:53:50,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:50,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:50,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444506316] [2021-07-13 19:53:50,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444506316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:50,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763569942] [2021-07-13 19:53:50,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:50,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:50,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:50,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:53:50,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:50,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:50,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:50,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:50,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:50,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-07-13 19:53:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:50,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763569942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:50,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:50,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:50,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338058047] [2021-07-13 19:53:50,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:50,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:50,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:50,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:50,874 INFO L87 Difference]: Start difference. First operand 2230 states and 9570 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:51,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:51,618 INFO L93 Difference]: Finished difference Result 2788 states and 11797 transitions. [2021-07-13 19:53:51,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:53:51,618 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:51,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:51,626 INFO L225 Difference]: With dead ends: 2788 [2021-07-13 19:53:51,626 INFO L226 Difference]: Without dead ends: 2748 [2021-07-13 19:53:51,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 532.5ms TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:53:51,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2021-07-13 19:53:51,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 2230. [2021-07-13 19:53:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 4.291610587707492) internal successors, (9566), 2229 states have internal predecessors, (9566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:51,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 9566 transitions. [2021-07-13 19:53:51,662 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 9566 transitions. Word has length 29 [2021-07-13 19:53:51,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:51,662 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 9566 transitions. [2021-07-13 19:53:51,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:51,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 9566 transitions. [2021-07-13 19:53:51,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:51,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:51,666 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:51,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:51,881 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:51,881 INFO L82 PathProgramCache]: Analyzing trace with hash -207437312, now seen corresponding path program 35 times [2021-07-13 19:53:51,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:51,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306127736] [2021-07-13 19:53:51,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:51,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:51,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306127736] [2021-07-13 19:53:51,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306127736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:51,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164919414] [2021-07-13 19:53:51,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:52,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:53:52,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:52,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:52,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:52,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-13 19:53:52,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:52,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:52,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:52,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 19:53:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:52,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164919414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:52,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:52,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-13 19:53:52,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295066919] [2021-07-13 19:53:52,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:53:52,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:52,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:53:52,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:52,178 INFO L87 Difference]: Start difference. First operand 2230 states and 9566 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:52,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:52,683 INFO L93 Difference]: Finished difference Result 2832 states and 11974 transitions. [2021-07-13 19:53:52,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:53:52,684 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:52,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:52,691 INFO L225 Difference]: With dead ends: 2832 [2021-07-13 19:53:52,691 INFO L226 Difference]: Without dead ends: 2809 [2021-07-13 19:53:52,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 441.6ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:53:52,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2021-07-13 19:53:52,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2230. [2021-07-13 19:53:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 4.291610587707492) internal successors, (9566), 2229 states have internal predecessors, (9566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 9566 transitions. [2021-07-13 19:53:52,727 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 9566 transitions. Word has length 29 [2021-07-13 19:53:52,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:52,727 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 9566 transitions. [2021-07-13 19:53:52,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:52,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 9566 transitions. [2021-07-13 19:53:52,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:52,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:52,731 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:52,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:52,932 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:52,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:52,932 INFO L82 PathProgramCache]: Analyzing trace with hash 828150992, now seen corresponding path program 11 times [2021-07-13 19:53:52,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:52,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25483932] [2021-07-13 19:53:52,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:53,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:53,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25483932] [2021-07-13 19:53:53,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25483932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:53,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122255714] [2021-07-13 19:53:53,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:53,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:53,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:53,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:53,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:53,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:53,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:53,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:53,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:53,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-13 19:53:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:53,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122255714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:53,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:53,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-07-13 19:53:53,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970315454] [2021-07-13 19:53:53,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:53:53,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:53,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:53:53,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:53,252 INFO L87 Difference]: Start difference. First operand 2230 states and 9566 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:53,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:53,499 INFO L93 Difference]: Finished difference Result 2973 states and 12521 transitions. [2021-07-13 19:53:53,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:53:53,499 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:53,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:53,506 INFO L225 Difference]: With dead ends: 2973 [2021-07-13 19:53:53,506 INFO L226 Difference]: Without dead ends: 2954 [2021-07-13 19:53:53,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 239.5ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:53,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2021-07-13 19:53:53,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2418. [2021-07-13 19:53:53,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 4.291683905668184) internal successors, (10373), 2417 states have internal predecessors, (10373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 10373 transitions. [2021-07-13 19:53:53,561 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 10373 transitions. Word has length 29 [2021-07-13 19:53:53,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:53,561 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 10373 transitions. [2021-07-13 19:53:53,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:53,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 10373 transitions. [2021-07-13 19:53:53,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:53,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:53,566 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:53,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:53,768 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:53,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:53,768 INFO L82 PathProgramCache]: Analyzing trace with hash -2044461478, now seen corresponding path program 12 times [2021-07-13 19:53:53,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:53,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006428517] [2021-07-13 19:53:53,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:53,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:53,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006428517] [2021-07-13 19:53:53,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006428517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:53,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638839606] [2021-07-13 19:53:53,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:53,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:53:53,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:53,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:53,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:54,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:54,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-07-13 19:53:54,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:54,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:54,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:54,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-13 19:53:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:54,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638839606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:54,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:54,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:54,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639222803] [2021-07-13 19:53:54,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:54,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:54,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:54,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:54,125 INFO L87 Difference]: Start difference. First operand 2418 states and 10373 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:54,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:54,534 INFO L93 Difference]: Finished difference Result 2831 states and 11904 transitions. [2021-07-13 19:53:54,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:53:54,534 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:54,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:54,542 INFO L225 Difference]: With dead ends: 2831 [2021-07-13 19:53:54,542 INFO L226 Difference]: Without dead ends: 2818 [2021-07-13 19:53:54,542 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 440.9ms TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:53:54,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2021-07-13 19:53:54,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2409. [2021-07-13 19:53:54,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 4.295265780730897) internal successors, (10343), 2408 states have internal predecessors, (10343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:54,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 10343 transitions. [2021-07-13 19:53:54,580 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 10343 transitions. Word has length 29 [2021-07-13 19:53:54,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:54,581 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 10343 transitions. [2021-07-13 19:53:54,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:54,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 10343 transitions. [2021-07-13 19:53:54,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:54,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:54,585 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:54,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-13 19:53:54,785 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:54,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:54,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1805403798, now seen corresponding path program 13 times [2021-07-13 19:53:54,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:54,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156480969] [2021-07-13 19:53:54,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:54,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:54,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156480969] [2021-07-13 19:53:54,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156480969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:54,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700070383] [2021-07-13 19:53:54,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:54,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:54,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:55,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:55,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:53:55,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:55,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:55,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:55,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-07-13 19:53:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:55,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700070383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:55,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:55,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-07-13 19:53:55,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523703407] [2021-07-13 19:53:55,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:53:55,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:55,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:53:55,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:53:55,099 INFO L87 Difference]: Start difference. First operand 2409 states and 10343 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:55,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:55,316 INFO L93 Difference]: Finished difference Result 2986 states and 12547 transitions. [2021-07-13 19:53:55,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:53:55,316 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:55,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:55,323 INFO L225 Difference]: With dead ends: 2986 [2021-07-13 19:53:55,323 INFO L226 Difference]: Without dead ends: 2958 [2021-07-13 19:53:55,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 234.5ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:55,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2021-07-13 19:53:55,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 2380. [2021-07-13 19:53:55,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 4.2984447246742326) internal successors, (10226), 2379 states have internal predecessors, (10226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:55,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 10226 transitions. [2021-07-13 19:53:55,363 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 10226 transitions. Word has length 29 [2021-07-13 19:53:55,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:55,363 INFO L482 AbstractCegarLoop]: Abstraction has 2380 states and 10226 transitions. [2021-07-13 19:53:55,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:55,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 10226 transitions. [2021-07-13 19:53:55,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:55,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:55,368 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:55,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:55,579 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:55,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:55,579 INFO L82 PathProgramCache]: Analyzing trace with hash -2005583254, now seen corresponding path program 14 times [2021-07-13 19:53:55,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:55,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064243979] [2021-07-13 19:53:55,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:55,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:55,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064243979] [2021-07-13 19:53:55,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064243979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:55,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468330265] [2021-07-13 19:53:55,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:55,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:55,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:55,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:55,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:55,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:55,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-07-13 19:53:55,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:55,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:55,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:55,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-07-13 19:53:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:55,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468330265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:55,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:55,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:55,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789371571] [2021-07-13 19:53:55,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:55,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:55,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:55,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:55,942 INFO L87 Difference]: Start difference. First operand 2380 states and 10226 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:56,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:56,738 INFO L93 Difference]: Finished difference Result 3039 states and 12879 transitions. [2021-07-13 19:53:56,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:53:56,739 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:56,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:56,746 INFO L225 Difference]: With dead ends: 3039 [2021-07-13 19:53:56,746 INFO L226 Difference]: Without dead ends: 3024 [2021-07-13 19:53:56,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 678.4ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:53:56,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2021-07-13 19:53:56,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2368. [2021-07-13 19:53:56,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 4.300802703844529) internal successors, (10180), 2367 states have internal predecessors, (10180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 10180 transitions. [2021-07-13 19:53:56,800 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 10180 transitions. Word has length 29 [2021-07-13 19:53:56,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:56,800 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 10180 transitions. [2021-07-13 19:53:56,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:56,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 10180 transitions. [2021-07-13 19:53:56,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:56,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:56,804 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:57,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 19:53:57,005 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:57,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:57,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1642415852, now seen corresponding path program 15 times [2021-07-13 19:53:57,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:57,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772879383] [2021-07-13 19:53:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:57,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:57,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772879383] [2021-07-13 19:53:57,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772879383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:57,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353428347] [2021-07-13 19:53:57,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:57,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:53:57,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:57,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:57,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:57,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:57,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-07-13 19:53:57,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:57,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:57,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:57,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-07-13 19:53:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:57,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353428347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:57,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:57,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:57,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768506292] [2021-07-13 19:53:57,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:57,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:57,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:57,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:57,365 INFO L87 Difference]: Start difference. First operand 2368 states and 10180 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:57,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:57,777 INFO L93 Difference]: Finished difference Result 2462 states and 10482 transitions. [2021-07-13 19:53:57,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:53:57,778 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:57,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:57,784 INFO L225 Difference]: With dead ends: 2462 [2021-07-13 19:53:57,784 INFO L226 Difference]: Without dead ends: 2447 [2021-07-13 19:53:57,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 423.2ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:53:57,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-07-13 19:53:57,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2362. [2021-07-13 19:53:57,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2361 states have (on average 4.303684879288437) internal successors, (10161), 2361 states have internal predecessors, (10161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 10161 transitions. [2021-07-13 19:53:57,818 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 10161 transitions. Word has length 29 [2021-07-13 19:53:57,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:57,818 INFO L482 AbstractCegarLoop]: Abstraction has 2362 states and 10161 transitions. [2021-07-13 19:53:57,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:57,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 10161 transitions. [2021-07-13 19:53:57,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:57,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:57,822 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:58,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 19:53:58,023 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:58,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:58,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1042410156, now seen corresponding path program 16 times [2021-07-13 19:53:58,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:58,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176866395] [2021-07-13 19:53:58,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:58,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:58,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176866395] [2021-07-13 19:53:58,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176866395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:58,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493936610] [2021-07-13 19:53:58,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:58,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:58,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:58,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:58,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:58,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:58,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:58,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:58,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:58,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-13 19:53:58,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:58,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493936610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:58,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:58,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-07-13 19:53:58,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879422114] [2021-07-13 19:53:58,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:53:58,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:58,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:53:58,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:58,301 INFO L87 Difference]: Start difference. First operand 2362 states and 10161 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:58,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:58,491 INFO L93 Difference]: Finished difference Result 2934 states and 12421 transitions. [2021-07-13 19:53:58,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:53:58,491 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:58,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:58,499 INFO L225 Difference]: With dead ends: 2934 [2021-07-13 19:53:58,499 INFO L226 Difference]: Without dead ends: 2915 [2021-07-13 19:53:58,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 191.1ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:58,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2915 states. [2021-07-13 19:53:58,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2915 to 2481. [2021-07-13 19:53:58,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 2480 states have (on average 4.30241935483871) internal successors, (10670), 2480 states have internal predecessors, (10670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 10670 transitions. [2021-07-13 19:53:58,540 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 10670 transitions. Word has length 29 [2021-07-13 19:53:58,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:58,540 INFO L482 AbstractCegarLoop]: Abstraction has 2481 states and 10670 transitions. [2021-07-13 19:53:58,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:58,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 10670 transitions. [2021-07-13 19:53:58,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:58,545 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:58,545 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:58,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:58,760 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:58,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:58,761 INFO L82 PathProgramCache]: Analyzing trace with hash 379944670, now seen corresponding path program 17 times [2021-07-13 19:53:58,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:58,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051648434] [2021-07-13 19:53:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:58,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:58,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051648434] [2021-07-13 19:53:58,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051648434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:58,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132928599] [2021-07-13 19:53:58,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:58,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:58,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:58,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:58,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:58,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:58,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:58,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:58,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:58,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-13 19:53:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:59,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132928599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:59,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:59,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-07-13 19:53:59,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235590978] [2021-07-13 19:53:59,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:53:59,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:59,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:53:59,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:53:59,023 INFO L87 Difference]: Start difference. First operand 2481 states and 10670 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:59,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:59,162 INFO L93 Difference]: Finished difference Result 2950 states and 12458 transitions. [2021-07-13 19:53:59,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:53:59,163 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:53:59,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:59,170 INFO L225 Difference]: With dead ends: 2950 [2021-07-13 19:53:59,170 INFO L226 Difference]: Without dead ends: 2919 [2021-07-13 19:53:59,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:59,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2021-07-13 19:53:59,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2401. [2021-07-13 19:53:59,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2401 states, 2400 states have (on average 4.306666666666667) internal successors, (10336), 2400 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:59,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2401 states to 2401 states and 10336 transitions. [2021-07-13 19:53:59,212 INFO L78 Accepts]: Start accepts. Automaton has 2401 states and 10336 transitions. Word has length 29 [2021-07-13 19:53:59,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:59,212 INFO L482 AbstractCegarLoop]: Abstraction has 2401 states and 10336 transitions. [2021-07-13 19:53:59,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:59,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2401 states and 10336 transitions. [2021-07-13 19:53:59,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:53:59,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:59,216 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:59,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 19:53:59,429 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:59,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:59,429 INFO L82 PathProgramCache]: Analyzing trace with hash 418822894, now seen corresponding path program 18 times [2021-07-13 19:53:59,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:59,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926457194] [2021-07-13 19:53:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:59,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:59,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926457194] [2021-07-13 19:53:59,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926457194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:59,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681660535] [2021-07-13 19:53:59,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:59,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:53:59,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:59,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:53:59,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:59,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:59,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:59,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:59,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:59,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:59,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:53:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:59,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681660535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:59,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:59,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:53:59,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487271766] [2021-07-13 19:53:59,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:53:59,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:59,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:53:59,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:59,763 INFO L87 Difference]: Start difference. First operand 2401 states and 10336 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:00,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:00,401 INFO L93 Difference]: Finished difference Result 2617 states and 11117 transitions. [2021-07-13 19:54:00,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:54:00,401 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:00,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:00,408 INFO L225 Difference]: With dead ends: 2617 [2021-07-13 19:54:00,408 INFO L226 Difference]: Without dead ends: 2602 [2021-07-13 19:54:00,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 493.2ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:54:00,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-07-13 19:54:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2371. [2021-07-13 19:54:00,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 2370 states have (on average 4.30379746835443) internal successors, (10200), 2370 states have internal predecessors, (10200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:00,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 10200 transitions. [2021-07-13 19:54:00,445 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 10200 transitions. Word has length 29 [2021-07-13 19:54:00,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:00,445 INFO L482 AbstractCegarLoop]: Abstraction has 2371 states and 10200 transitions. [2021-07-13 19:54:00,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:00,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 10200 transitions. [2021-07-13 19:54:00,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:00,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:00,450 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:00,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:00,650 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:00,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:00,650 INFO L82 PathProgramCache]: Analyzing trace with hash -945227760, now seen corresponding path program 19 times [2021-07-13 19:54:00,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:00,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495935178] [2021-07-13 19:54:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:00,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:00,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495935178] [2021-07-13 19:54:00,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495935178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:00,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087082645] [2021-07-13 19:54:00,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:00,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:00,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:00,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:00,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:00,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:00,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:00,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-13 19:54:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:00,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087082645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:00,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:00,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-07-13 19:54:00,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442495995] [2021-07-13 19:54:00,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:54:00,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:00,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:54:00,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:54:00,921 INFO L87 Difference]: Start difference. First operand 2371 states and 10200 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:01,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:01,093 INFO L93 Difference]: Finished difference Result 2978 states and 12481 transitions. [2021-07-13 19:54:01,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:54:01,093 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:01,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:01,100 INFO L225 Difference]: With dead ends: 2978 [2021-07-13 19:54:01,100 INFO L226 Difference]: Without dead ends: 2959 [2021-07-13 19:54:01,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:01,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2959 states. [2021-07-13 19:54:01,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2959 to 2475. [2021-07-13 19:54:01,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 4.297898140662894) internal successors, (10633), 2474 states have internal predecessors, (10633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:01,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 10633 transitions. [2021-07-13 19:54:01,138 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 10633 transitions. Word has length 29 [2021-07-13 19:54:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:01,139 INFO L482 AbstractCegarLoop]: Abstraction has 2475 states and 10633 transitions. [2021-07-13 19:54:01,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:01,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 10633 transitions. [2021-07-13 19:54:01,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:01,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:01,143 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:01,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-13 19:54:01,343 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:01,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:01,344 INFO L82 PathProgramCache]: Analyzing trace with hash 477127066, now seen corresponding path program 20 times [2021-07-13 19:54:01,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:01,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078995595] [2021-07-13 19:54:01,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:01,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:01,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078995595] [2021-07-13 19:54:01,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078995595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:01,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766611705] [2021-07-13 19:54:01,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:01,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:01,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:01,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:01,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:01,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:01,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:54:01,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:01,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:01,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:01,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:54:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:01,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766611705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:01,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:01,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:54:01,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676480669] [2021-07-13 19:54:01,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:54:01,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:01,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:54:01,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:54:01,674 INFO L87 Difference]: Start difference. First operand 2475 states and 10633 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:02,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:02,133 INFO L93 Difference]: Finished difference Result 2877 states and 12016 transitions. [2021-07-13 19:54:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:54:02,134 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:02,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:02,141 INFO L225 Difference]: With dead ends: 2877 [2021-07-13 19:54:02,141 INFO L226 Difference]: Without dead ends: 2864 [2021-07-13 19:54:02,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 405.7ms TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:54:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2021-07-13 19:54:02,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2475. [2021-07-13 19:54:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 4.296685529506871) internal successors, (10630), 2474 states have internal predecessors, (10630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 10630 transitions. [2021-07-13 19:54:02,185 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 10630 transitions. Word has length 29 [2021-07-13 19:54:02,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:02,195 INFO L482 AbstractCegarLoop]: Abstraction has 2475 states and 10630 transitions. [2021-07-13 19:54:02,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:02,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 10630 transitions. [2021-07-13 19:54:02,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:02,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:02,200 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:02,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:02,401 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:02,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:02,401 INFO L82 PathProgramCache]: Analyzing trace with hash 32025046, now seen corresponding path program 21 times [2021-07-13 19:54:02,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:02,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854541331] [2021-07-13 19:54:02,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:02,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:02,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854541331] [2021-07-13 19:54:02,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854541331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:02,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91428767] [2021-07-13 19:54:02,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:02,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:54:02,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:02,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:02,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:02,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:02,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:54:02,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:02,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:02,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:02,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:54:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:02,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91428767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:02,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:02,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:54:02,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125717016] [2021-07-13 19:54:02,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:54:02,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:02,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:54:02,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:54:02,719 INFO L87 Difference]: Start difference. First operand 2475 states and 10630 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:03,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:03,408 INFO L93 Difference]: Finished difference Result 2830 states and 11884 transitions. [2021-07-13 19:54:03,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:54:03,409 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:03,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:03,416 INFO L225 Difference]: With dead ends: 2830 [2021-07-13 19:54:03,417 INFO L226 Difference]: Without dead ends: 2815 [2021-07-13 19:54:03,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 574.1ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:54:03,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2021-07-13 19:54:03,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 2475. [2021-07-13 19:54:03,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 4.295472918350849) internal successors, (10627), 2474 states have internal predecessors, (10627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 10627 transitions. [2021-07-13 19:54:03,466 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 10627 transitions. Word has length 29 [2021-07-13 19:54:03,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:03,466 INFO L482 AbstractCegarLoop]: Abstraction has 2475 states and 10627 transitions. [2021-07-13 19:54:03,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:03,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 10627 transitions. [2021-07-13 19:54:03,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:03,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:03,470 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:03,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-13 19:54:03,670 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:03,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:03,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1748573256, now seen corresponding path program 22 times [2021-07-13 19:54:03,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:03,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797951180] [2021-07-13 19:54:03,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:03,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:03,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797951180] [2021-07-13 19:54:03,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797951180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:03,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528786691] [2021-07-13 19:54:03,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:03,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:03,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:03,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:03,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:03,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:03,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:54:03,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:03,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:03,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:03,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-07-13 19:54:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:03,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528786691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:03,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:03,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-07-13 19:54:03,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116637437] [2021-07-13 19:54:03,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:54:03,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:03,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:54:03,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:54:03,927 INFO L87 Difference]: Start difference. First operand 2475 states and 10627 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:04,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:04,070 INFO L93 Difference]: Finished difference Result 2936 states and 12367 transitions. [2021-07-13 19:54:04,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:54:04,070 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:04,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:04,077 INFO L225 Difference]: With dead ends: 2936 [2021-07-13 19:54:04,078 INFO L226 Difference]: Without dead ends: 2911 [2021-07-13 19:54:04,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 168.6ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:04,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2021-07-13 19:54:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2395. [2021-07-13 19:54:04,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 4.302005012531328) internal successors, (10299), 2394 states have internal predecessors, (10299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:04,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 10299 transitions. [2021-07-13 19:54:04,119 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 10299 transitions. Word has length 29 [2021-07-13 19:54:04,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:04,119 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 10299 transitions. [2021-07-13 19:54:04,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:04,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 10299 transitions. [2021-07-13 19:54:04,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:04,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:04,124 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:04,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:04,325 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:04,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:04,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2122928432, now seen corresponding path program 23 times [2021-07-13 19:54:04,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:04,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018619702] [2021-07-13 19:54:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:04,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:04,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018619702] [2021-07-13 19:54:04,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018619702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:04,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540335143] [2021-07-13 19:54:04,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:04,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:54:04,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:04,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:54:04,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:04,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:04,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:04,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:04,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:04,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:22 [2021-07-13 19:54:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:04,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540335143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:04,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:04,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-13 19:54:04,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429006747] [2021-07-13 19:54:04,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:54:04,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:04,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:54:04,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:54:04,628 INFO L87 Difference]: Start difference. First operand 2395 states and 10299 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:04,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:04,873 INFO L93 Difference]: Finished difference Result 2541 states and 10795 transitions. [2021-07-13 19:54:04,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:54:04,873 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:04,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:04,880 INFO L225 Difference]: With dead ends: 2541 [2021-07-13 19:54:04,880 INFO L226 Difference]: Without dead ends: 2522 [2021-07-13 19:54:04,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:54:04,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2021-07-13 19:54:04,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 2392. [2021-07-13 19:54:04,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 4.303638644918444) internal successors, (10290), 2391 states have internal predecessors, (10290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 10290 transitions. [2021-07-13 19:54:04,917 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 10290 transitions. Word has length 29 [2021-07-13 19:54:04,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:04,917 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 10290 transitions. [2021-07-13 19:54:04,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 10290 transitions. [2021-07-13 19:54:04,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:04,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:04,921 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:05,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-13 19:54:05,122 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:05,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:05,122 INFO L82 PathProgramCache]: Analyzing trace with hash -918912018, now seen corresponding path program 1 times [2021-07-13 19:54:05,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:05,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327780061] [2021-07-13 19:54:05,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:05,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:05,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327780061] [2021-07-13 19:54:05,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327780061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:05,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946109671] [2021-07-13 19:54:05,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:05,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:05,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:05,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:05,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:05,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:05,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:05,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:10 [2021-07-13 19:54:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:05,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946109671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:05,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:05,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-07-13 19:54:05,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380990341] [2021-07-13 19:54:05,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:54:05,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:05,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:54:05,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:54:05,400 INFO L87 Difference]: Start difference. First operand 2392 states and 10290 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:05,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:05,686 INFO L93 Difference]: Finished difference Result 2644 states and 11188 transitions. [2021-07-13 19:54:05,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:54:05,687 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:05,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:05,693 INFO L225 Difference]: With dead ends: 2644 [2021-07-13 19:54:05,693 INFO L226 Difference]: Without dead ends: 2625 [2021-07-13 19:54:05,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 277.4ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:54:05,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-07-13 19:54:05,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2494. [2021-07-13 19:54:05,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2493 states have (on average 4.292418772563177) internal successors, (10701), 2493 states have internal predecessors, (10701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:05,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 10701 transitions. [2021-07-13 19:54:05,731 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 10701 transitions. Word has length 29 [2021-07-13 19:54:05,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:05,731 INFO L482 AbstractCegarLoop]: Abstraction has 2494 states and 10701 transitions. [2021-07-13 19:54:05,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:05,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 10701 transitions. [2021-07-13 19:54:05,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:05,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:05,736 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:05,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:05,941 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:05,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:05,942 INFO L82 PathProgramCache]: Analyzing trace with hash -923682226, now seen corresponding path program 1 times [2021-07-13 19:54:05,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:05,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962923228] [2021-07-13 19:54:05,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:06,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:06,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:06,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962923228] [2021-07-13 19:54:06,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962923228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:06,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985161681] [2021-07-13 19:54:06,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:06,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:06,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:06,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:06,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:06,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:06,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:06,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:10 [2021-07-13 19:54:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:06,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985161681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:06,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:06,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 19:54:06,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957054394] [2021-07-13 19:54:06,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:54:06,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:06,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:54:06,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:54:06,177 INFO L87 Difference]: Start difference. First operand 2494 states and 10701 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:06,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:06,428 INFO L93 Difference]: Finished difference Result 2653 states and 11209 transitions. [2021-07-13 19:54:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:54:06,428 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:06,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:06,435 INFO L225 Difference]: With dead ends: 2653 [2021-07-13 19:54:06,435 INFO L226 Difference]: Without dead ends: 2634 [2021-07-13 19:54:06,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:06,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-07-13 19:54:06,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2496. [2021-07-13 19:54:06,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2495 states have (on average 4.292184368737475) internal successors, (10709), 2495 states have internal predecessors, (10709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 10709 transitions. [2021-07-13 19:54:06,476 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 10709 transitions. Word has length 29 [2021-07-13 19:54:06,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:06,476 INFO L482 AbstractCegarLoop]: Abstraction has 2496 states and 10709 transitions. [2021-07-13 19:54:06,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:06,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 10709 transitions. [2021-07-13 19:54:06,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:06,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:06,480 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:06,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 19:54:06,695 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:06,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:06,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1926683450, now seen corresponding path program 2 times [2021-07-13 19:54:06,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:06,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962071700] [2021-07-13 19:54:06,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:06,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:06,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962071700] [2021-07-13 19:54:06,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962071700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:06,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841297002] [2021-07-13 19:54:06,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:06,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:06,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:06,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:06,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:06,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:06,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:54:06,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:06,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:06,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:06,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-07-13 19:54:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:07,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841297002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:07,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:07,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:54:07,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823906925] [2021-07-13 19:54:07,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:54:07,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:07,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:54:07,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:07,042 INFO L87 Difference]: Start difference. First operand 2496 states and 10709 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:07,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:07,650 INFO L93 Difference]: Finished difference Result 2859 states and 12086 transitions. [2021-07-13 19:54:07,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:54:07,650 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:07,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:07,657 INFO L225 Difference]: With dead ends: 2859 [2021-07-13 19:54:07,657 INFO L226 Difference]: Without dead ends: 2840 [2021-07-13 19:54:07,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 547.3ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:54:07,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-07-13 19:54:07,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2526. [2021-07-13 19:54:07,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2526 states, 2525 states have (on average 4.295049504950495) internal successors, (10845), 2525 states have internal predecessors, (10845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2526 states to 2526 states and 10845 transitions. [2021-07-13 19:54:07,697 INFO L78 Accepts]: Start accepts. Automaton has 2526 states and 10845 transitions. Word has length 29 [2021-07-13 19:54:07,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:07,698 INFO L482 AbstractCegarLoop]: Abstraction has 2526 states and 10845 transitions. [2021-07-13 19:54:07,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 2526 states and 10845 transitions. [2021-07-13 19:54:07,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:07,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:07,702 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:07,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 19:54:07,903 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:07,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:07,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1804686422, now seen corresponding path program 3 times [2021-07-13 19:54:07,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:07,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806307601] [2021-07-13 19:54:07,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:08,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:08,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806307601] [2021-07-13 19:54:08,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806307601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:08,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456127428] [2021-07-13 19:54:08,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:08,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:54:08,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:08,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:08,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:08,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:08,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-07-13 19:54:08,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:08,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:08,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:08,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-13 19:54:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:08,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456127428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:08,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:08,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:54:08,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459336003] [2021-07-13 19:54:08,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:54:08,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:08,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:54:08,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:08,274 INFO L87 Difference]: Start difference. First operand 2526 states and 10845 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:08,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:08,990 INFO L93 Difference]: Finished difference Result 3102 states and 12904 transitions. [2021-07-13 19:54:08,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:54:08,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:08,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:08,997 INFO L225 Difference]: With dead ends: 3102 [2021-07-13 19:54:08,997 INFO L226 Difference]: Without dead ends: 3064 [2021-07-13 19:54:08,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 624.4ms TimeCoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:54:09,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2021-07-13 19:54:09,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 2589. [2021-07-13 19:54:09,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2589 states, 2588 states have (on average 4.299459041731066) internal successors, (11127), 2588 states have internal predecessors, (11127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:09,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 11127 transitions. [2021-07-13 19:54:09,040 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 11127 transitions. Word has length 29 [2021-07-13 19:54:09,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:09,041 INFO L482 AbstractCegarLoop]: Abstraction has 2589 states and 11127 transitions. [2021-07-13 19:54:09,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:09,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 11127 transitions. [2021-07-13 19:54:09,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:09,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:09,045 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:09,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 19:54:09,245 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:09,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:09,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1433461416, now seen corresponding path program 4 times [2021-07-13 19:54:09,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:09,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743666808] [2021-07-13 19:54:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:09,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:09,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743666808] [2021-07-13 19:54:09,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743666808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:09,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237315083] [2021-07-13 19:54:09,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:09,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:09,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:09,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:09,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:09,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:09,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:09,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:09,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:09,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-13 19:54:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:09,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237315083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:09,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:09,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-07-13 19:54:09,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251955296] [2021-07-13 19:54:09,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:54:09,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:09,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:54:09,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:54:09,513 INFO L87 Difference]: Start difference. First operand 2589 states and 11127 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:09,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:09,819 INFO L93 Difference]: Finished difference Result 3136 states and 13219 transitions. [2021-07-13 19:54:09,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:54:09,819 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:09,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:09,827 INFO L225 Difference]: With dead ends: 3136 [2021-07-13 19:54:09,827 INFO L226 Difference]: Without dead ends: 3121 [2021-07-13 19:54:09,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 275.5ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:54:09,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2021-07-13 19:54:09,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 2605. [2021-07-13 19:54:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2605 states, 2604 states have (on average 4.29147465437788) internal successors, (11175), 2604 states have internal predecessors, (11175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:09,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 11175 transitions. [2021-07-13 19:54:09,868 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 11175 transitions. Word has length 29 [2021-07-13 19:54:09,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:09,868 INFO L482 AbstractCegarLoop]: Abstraction has 2605 states and 11175 transitions. [2021-07-13 19:54:09,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:09,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 11175 transitions. [2021-07-13 19:54:09,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:09,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:09,872 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:10,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:10,073 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:10,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:10,073 INFO L82 PathProgramCache]: Analyzing trace with hash -234932026, now seen corresponding path program 5 times [2021-07-13 19:54:10,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:10,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838138581] [2021-07-13 19:54:10,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:10,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:10,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838138581] [2021-07-13 19:54:10,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838138581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:10,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186387247] [2021-07-13 19:54:10,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:10,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:10,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:10,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:10,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:10,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:10,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:10,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:10,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:10,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-13 19:54:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:10,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186387247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:10,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:10,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-07-13 19:54:10,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506114540] [2021-07-13 19:54:10,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:54:10,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:10,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:54:10,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:54:10,329 INFO L87 Difference]: Start difference. First operand 2605 states and 11175 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:10,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:10,590 INFO L93 Difference]: Finished difference Result 3149 states and 13269 transitions. [2021-07-13 19:54:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:54:10,590 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:10,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:10,598 INFO L225 Difference]: With dead ends: 3149 [2021-07-13 19:54:10,598 INFO L226 Difference]: Without dead ends: 3123 [2021-07-13 19:54:10,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 241.3ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:54:10,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-07-13 19:54:10,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 2510. [2021-07-13 19:54:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2510 states, 2509 states have (on average 4.302909525707453) internal successors, (10796), 2509 states have internal predecessors, (10796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2510 states to 2510 states and 10796 transitions. [2021-07-13 19:54:10,639 INFO L78 Accepts]: Start accepts. Automaton has 2510 states and 10796 transitions. Word has length 29 [2021-07-13 19:54:10,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:10,639 INFO L482 AbstractCegarLoop]: Abstraction has 2510 states and 10796 transitions. [2021-07-13 19:54:10,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:10,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2510 states and 10796 transitions. [2021-07-13 19:54:10,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:10,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:10,643 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:10,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:10,849 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:10,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:10,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1340011206, now seen corresponding path program 2 times [2021-07-13 19:54:10,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:10,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898141656] [2021-07-13 19:54:10,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:10,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:10,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898141656] [2021-07-13 19:54:10,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898141656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:10,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859955068] [2021-07-13 19:54:10,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:10,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:10,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:10,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:10,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:11,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:11,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-07-13 19:54:11,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:11,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:11,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:11,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-13 19:54:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:11,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859955068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:11,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:11,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 19:54:11,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488488013] [2021-07-13 19:54:11,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:11,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:11,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:11,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:11,181 INFO L87 Difference]: Start difference. First operand 2510 states and 10796 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:11,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:11,780 INFO L93 Difference]: Finished difference Result 3041 states and 12779 transitions. [2021-07-13 19:54:11,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:54:11,780 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:11,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:11,787 INFO L225 Difference]: With dead ends: 3041 [2021-07-13 19:54:11,787 INFO L226 Difference]: Without dead ends: 3022 [2021-07-13 19:54:11,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 532.2ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:54:11,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-07-13 19:54:11,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2540. [2021-07-13 19:54:11,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 4.301693580149665) internal successors, (10922), 2539 states have internal predecessors, (10922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:11,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 10922 transitions. [2021-07-13 19:54:11,826 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 10922 transitions. Word has length 29 [2021-07-13 19:54:11,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:11,827 INFO L482 AbstractCegarLoop]: Abstraction has 2540 states and 10922 transitions. [2021-07-13 19:54:11,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:11,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 10922 transitions. [2021-07-13 19:54:11,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:11,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:11,831 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:12,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:12,031 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:12,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:12,032 INFO L82 PathProgramCache]: Analyzing trace with hash -364239170, now seen corresponding path program 3 times [2021-07-13 19:54:12,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:12,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863376307] [2021-07-13 19:54:12,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:12,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:12,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863376307] [2021-07-13 19:54:12,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863376307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:12,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561841499] [2021-07-13 19:54:12,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:12,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:54:12,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:12,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:12,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:12,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:12,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-07-13 19:54:12,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:12,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:12,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:12,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-13 19:54:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:12,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561841499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:12,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:12,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 19:54:12,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765039773] [2021-07-13 19:54:12,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:12,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:12,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:12,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:12,325 INFO L87 Difference]: Start difference. First operand 2540 states and 10922 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:12,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:12,955 INFO L93 Difference]: Finished difference Result 3595 states and 14868 transitions. [2021-07-13 19:54:12,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:54:12,955 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:12,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:12,964 INFO L225 Difference]: With dead ends: 3595 [2021-07-13 19:54:12,964 INFO L226 Difference]: Without dead ends: 3557 [2021-07-13 19:54:12,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 487.1ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:54:12,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2021-07-13 19:54:13,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2640. [2021-07-13 19:54:13,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 4.297082228116711) internal successors, (11340), 2639 states have internal predecessors, (11340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 11340 transitions. [2021-07-13 19:54:13,009 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 11340 transitions. Word has length 29 [2021-07-13 19:54:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:13,009 INFO L482 AbstractCegarLoop]: Abstraction has 2640 states and 11340 transitions. [2021-07-13 19:54:13,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 11340 transitions. [2021-07-13 19:54:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:13,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:13,014 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:13,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-07-13 19:54:13,229 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:13,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:13,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1058115656, now seen corresponding path program 4 times [2021-07-13 19:54:13,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:13,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778158995] [2021-07-13 19:54:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:13,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:13,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778158995] [2021-07-13 19:54:13,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778158995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:13,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076087561] [2021-07-13 19:54:13,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:13,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:13,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:13,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:13,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:13,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:13,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:13,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:13,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:13,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-13 19:54:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:13,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076087561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:13,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:13,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 19:54:13,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972734920] [2021-07-13 19:54:13,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:54:13,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:13,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:54:13,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:54:13,436 INFO L87 Difference]: Start difference. First operand 2640 states and 11340 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:13,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:13,664 INFO L93 Difference]: Finished difference Result 3227 states and 13608 transitions. [2021-07-13 19:54:13,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:54:13,665 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:13,673 INFO L225 Difference]: With dead ends: 3227 [2021-07-13 19:54:13,673 INFO L226 Difference]: Without dead ends: 3196 [2021-07-13 19:54:13,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:54:13,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2021-07-13 19:54:13,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 2492. [2021-07-13 19:54:13,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2492 states, 2491 states have (on average 4.308711360899237) internal successors, (10733), 2491 states have internal predecessors, (10733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2492 states to 2492 states and 10733 transitions. [2021-07-13 19:54:13,714 INFO L78 Accepts]: Start accepts. Automaton has 2492 states and 10733 transitions. Word has length 29 [2021-07-13 19:54:13,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:13,714 INFO L482 AbstractCegarLoop]: Abstraction has 2492 states and 10733 transitions. [2021-07-13 19:54:13,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:13,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2492 states and 10733 transitions. [2021-07-13 19:54:13,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:13,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:13,718 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:13,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:13,919 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:13,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:13,919 INFO L82 PathProgramCache]: Analyzing trace with hash -2051190826, now seen corresponding path program 6 times [2021-07-13 19:54:13,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:13,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094279896] [2021-07-13 19:54:13,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:14,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:14,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094279896] [2021-07-13 19:54:14,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094279896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:14,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405657695] [2021-07-13 19:54:14,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:14,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:54:14,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:14,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:14,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:14,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:14,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:54:14,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:14,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:14,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:14,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:54:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:14,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405657695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:14,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:14,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:54:14,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240507472] [2021-07-13 19:54:14,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:54:14,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:14,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:54:14,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:14,297 INFO L87 Difference]: Start difference. First operand 2492 states and 10733 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:15,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:15,010 INFO L93 Difference]: Finished difference Result 3028 states and 12675 transitions. [2021-07-13 19:54:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:54:15,010 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:15,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:15,028 INFO L225 Difference]: With dead ends: 3028 [2021-07-13 19:54:15,028 INFO L226 Difference]: Without dead ends: 3009 [2021-07-13 19:54:15,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 686.7ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:54:15,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2021-07-13 19:54:15,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 2591. [2021-07-13 19:54:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2591 states, 2590 states have (on average 4.316602316602316) internal successors, (11180), 2590 states have internal predecessors, (11180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2591 states to 2591 states and 11180 transitions. [2021-07-13 19:54:15,071 INFO L78 Accepts]: Start accepts. Automaton has 2591 states and 11180 transitions. Word has length 29 [2021-07-13 19:54:15,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:15,071 INFO L482 AbstractCegarLoop]: Abstraction has 2591 states and 11180 transitions. [2021-07-13 19:54:15,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:15,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2591 states and 11180 transitions. [2021-07-13 19:54:15,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:15,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:15,075 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:15,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:15,276 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:15,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:15,276 INFO L82 PathProgramCache]: Analyzing trace with hash -747918220, now seen corresponding path program 7 times [2021-07-13 19:54:15,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:15,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262381772] [2021-07-13 19:54:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:15,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:15,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262381772] [2021-07-13 19:54:15,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262381772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:15,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077775787] [2021-07-13 19:54:15,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:15,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:15,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:15,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:15,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:54:15,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:15,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:15,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:15,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-07-13 19:54:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:15,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077775787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:15,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:15,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-07-13 19:54:15,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107391185] [2021-07-13 19:54:15,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:54:15,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:15,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:54:15,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:54:15,518 INFO L87 Difference]: Start difference. First operand 2591 states and 11180 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:15,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:15,720 INFO L93 Difference]: Finished difference Result 3061 states and 12960 transitions. [2021-07-13 19:54:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:54:15,720 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:15,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:15,728 INFO L225 Difference]: With dead ends: 3061 [2021-07-13 19:54:15,728 INFO L226 Difference]: Without dead ends: 3046 [2021-07-13 19:54:15,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 180.9ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:15,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2021-07-13 19:54:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 2610. [2021-07-13 19:54:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2610 states, 2609 states have (on average 4.3073974702951325) internal successors, (11238), 2609 states have internal predecessors, (11238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:15,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2610 states to 2610 states and 11238 transitions. [2021-07-13 19:54:15,767 INFO L78 Accepts]: Start accepts. Automaton has 2610 states and 11238 transitions. Word has length 29 [2021-07-13 19:54:15,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:15,768 INFO L482 AbstractCegarLoop]: Abstraction has 2610 states and 11238 transitions. [2021-07-13 19:54:15,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:15,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2610 states and 11238 transitions. [2021-07-13 19:54:15,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:15,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:15,772 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:15,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:15,972 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:15,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:15,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1878655634, now seen corresponding path program 8 times [2021-07-13 19:54:15,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:15,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579284190] [2021-07-13 19:54:15,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:16,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:16,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579284190] [2021-07-13 19:54:16,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579284190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:16,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400415872] [2021-07-13 19:54:16,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:16,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:16,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:16,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:16,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:16,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:16,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:54:16,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:16,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:16,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:16,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:54:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:16,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400415872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:16,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:16,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:54:16,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180849091] [2021-07-13 19:54:16,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:16,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:16,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:16,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:16,269 INFO L87 Difference]: Start difference. First operand 2610 states and 11238 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:16,902 INFO L93 Difference]: Finished difference Result 3023 states and 12668 transitions. [2021-07-13 19:54:16,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:54:16,902 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:16,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:16,909 INFO L225 Difference]: With dead ends: 3023 [2021-07-13 19:54:16,909 INFO L226 Difference]: Without dead ends: 3009 [2021-07-13 19:54:16,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 537.7ms TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:54:16,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2021-07-13 19:54:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 2603. [2021-07-13 19:54:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 4.309761721752498) internal successors, (11214), 2602 states have internal predecessors, (11214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:16,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 11214 transitions. [2021-07-13 19:54:16,950 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 11214 transitions. Word has length 29 [2021-07-13 19:54:16,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:16,950 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 11214 transitions. [2021-07-13 19:54:16,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:16,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 11214 transitions. [2021-07-13 19:54:16,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:16,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:16,954 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:17,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-13 19:54:17,155 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:17,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:17,155 INFO L82 PathProgramCache]: Analyzing trace with hash -801304740, now seen corresponding path program 9 times [2021-07-13 19:54:17,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:17,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961893131] [2021-07-13 19:54:17,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:17,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:17,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961893131] [2021-07-13 19:54:17,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961893131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:17,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468353334] [2021-07-13 19:54:17,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:17,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:54:17,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:17,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:17,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:17,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:17,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:54:17,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:17,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:17,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:17,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:54:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:17,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468353334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:17,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:17,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:54:17,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320658879] [2021-07-13 19:54:17,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:17,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:17,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:17,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:17,470 INFO L87 Difference]: Start difference. First operand 2603 states and 11214 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:17,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:17,986 INFO L93 Difference]: Finished difference Result 2991 states and 12597 transitions. [2021-07-13 19:54:17,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:54:17,987 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:17,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:17,994 INFO L225 Difference]: With dead ends: 2991 [2021-07-13 19:54:17,994 INFO L226 Difference]: Without dead ends: 2968 [2021-07-13 19:54:17,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 504.3ms TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:54:17,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2021-07-13 19:54:18,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 2531. [2021-07-13 19:54:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 4.311462450592885) internal successors, (10908), 2530 states have internal predecessors, (10908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:18,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 10908 transitions. [2021-07-13 19:54:18,034 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 10908 transitions. Word has length 29 [2021-07-13 19:54:18,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:18,035 INFO L482 AbstractCegarLoop]: Abstraction has 2531 states and 10908 transitions. [2021-07-13 19:54:18,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:18,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 10908 transitions. [2021-07-13 19:54:18,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:18,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:18,040 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:18,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:18,241 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:18,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:18,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1337845358, now seen corresponding path program 10 times [2021-07-13 19:54:18,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:18,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110213034] [2021-07-13 19:54:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:18,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:18,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110213034] [2021-07-13 19:54:18,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110213034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:18,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577601757] [2021-07-13 19:54:18,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:18,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:18,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:18,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:18,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:18,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:18,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:54:18,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:18,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:18,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:18,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-07-13 19:54:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:18,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577601757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:18,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:18,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-07-13 19:54:18,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820987969] [2021-07-13 19:54:18,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:54:18,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:18,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:54:18,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:54:18,563 INFO L87 Difference]: Start difference. First operand 2531 states and 10908 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:18,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:18,797 INFO L93 Difference]: Finished difference Result 2666 states and 11389 transitions. [2021-07-13 19:54:18,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:54:18,797 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:18,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:18,803 INFO L225 Difference]: With dead ends: 2666 [2021-07-13 19:54:18,804 INFO L226 Difference]: Without dead ends: 2647 [2021-07-13 19:54:18,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:18,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2647 states. [2021-07-13 19:54:18,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2647 to 2531. [2021-07-13 19:54:18,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 4.311462450592885) internal successors, (10908), 2530 states have internal predecessors, (10908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 10908 transitions. [2021-07-13 19:54:18,840 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 10908 transitions. Word has length 29 [2021-07-13 19:54:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:18,840 INFO L482 AbstractCegarLoop]: Abstraction has 2531 states and 10908 transitions. [2021-07-13 19:54:18,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:18,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 10908 transitions. [2021-07-13 19:54:18,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:18,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:18,844 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:19,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:19,045 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:19,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:19,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1901442782, now seen corresponding path program 11 times [2021-07-13 19:54:19,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:19,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516608058] [2021-07-13 19:54:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:19,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:19,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516608058] [2021-07-13 19:54:19,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516608058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:19,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630300484] [2021-07-13 19:54:19,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:19,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:19,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:19,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:19,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:19,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:19,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:19,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:19,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:19,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:19 [2021-07-13 19:54:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:19,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630300484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:19,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:19,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-13 19:54:19,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869741345] [2021-07-13 19:54:19,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:54:19,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:19,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:54:19,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:54:19,313 INFO L87 Difference]: Start difference. First operand 2531 states and 10908 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:19,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:19,508 INFO L93 Difference]: Finished difference Result 3018 states and 12763 transitions. [2021-07-13 19:54:19,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:54:19,508 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:19,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:19,516 INFO L225 Difference]: With dead ends: 3018 [2021-07-13 19:54:19,516 INFO L226 Difference]: Without dead ends: 2995 [2021-07-13 19:54:19,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:54:19,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-07-13 19:54:19,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2501. [2021-07-13 19:54:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 4.3088) internal successors, (10772), 2500 states have internal predecessors, (10772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:19,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 10772 transitions. [2021-07-13 19:54:19,561 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 10772 transitions. Word has length 29 [2021-07-13 19:54:19,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:19,561 INFO L482 AbstractCegarLoop]: Abstraction has 2501 states and 10772 transitions. [2021-07-13 19:54:19,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:19,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 10772 transitions. [2021-07-13 19:54:19,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:19,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:19,565 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:19,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 19:54:19,766 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:19,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:19,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1004214994, now seen corresponding path program 12 times [2021-07-13 19:54:19,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:19,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841543124] [2021-07-13 19:54:19,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:19,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:19,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:19,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841543124] [2021-07-13 19:54:19,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841543124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:19,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552665116] [2021-07-13 19:54:19,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:19,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:54:19,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:19,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:54:19,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:19,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:19,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:54:19,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:19,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:19,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:19,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-07-13 19:54:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:20,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552665116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:20,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:20,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:54:20,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232231404] [2021-07-13 19:54:20,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:54:20,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:20,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:54:20,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:54:20,051 INFO L87 Difference]: Start difference. First operand 2501 states and 10772 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:20,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:20,777 INFO L93 Difference]: Finished difference Result 3190 states and 13408 transitions. [2021-07-13 19:54:20,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:54:20,777 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:20,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:20,785 INFO L225 Difference]: With dead ends: 3190 [2021-07-13 19:54:20,785 INFO L226 Difference]: Without dead ends: 3171 [2021-07-13 19:54:20,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 628.3ms TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:54:20,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2021-07-13 19:54:20,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 2585. [2021-07-13 19:54:20,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2584 states have (on average 4.312693498452012) internal successors, (11144), 2584 states have internal predecessors, (11144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:20,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 11144 transitions. [2021-07-13 19:54:20,827 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 11144 transitions. Word has length 29 [2021-07-13 19:54:20,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:20,827 INFO L482 AbstractCegarLoop]: Abstraction has 2585 states and 11144 transitions. [2021-07-13 19:54:20,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 11144 transitions. [2021-07-13 19:54:20,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:20,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:20,831 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:21,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:21,032 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:21,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:21,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1987479696, now seen corresponding path program 13 times [2021-07-13 19:54:21,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:21,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306874123] [2021-07-13 19:54:21,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:21,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:21,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306874123] [2021-07-13 19:54:21,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306874123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:21,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860931506] [2021-07-13 19:54:21,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:21,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:21,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:21,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:21,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:21,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:21,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:21,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-13 19:54:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:21,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860931506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:21,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:21,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-07-13 19:54:21,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325326048] [2021-07-13 19:54:21,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:54:21,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:21,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:54:21,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:54:21,275 INFO L87 Difference]: Start difference. First operand 2585 states and 11144 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:21,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:21,476 INFO L93 Difference]: Finished difference Result 3052 states and 12852 transitions. [2021-07-13 19:54:21,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:54:21,477 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:21,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:21,484 INFO L225 Difference]: With dead ends: 3052 [2021-07-13 19:54:21,485 INFO L226 Difference]: Without dead ends: 3037 [2021-07-13 19:54:21,485 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:21,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2021-07-13 19:54:21,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 2604. [2021-07-13 19:54:21,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2604 states, 2603 states have (on average 4.303111794083749) internal successors, (11201), 2603 states have internal predecessors, (11201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 11201 transitions. [2021-07-13 19:54:21,526 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 11201 transitions. Word has length 29 [2021-07-13 19:54:21,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:21,526 INFO L482 AbstractCegarLoop]: Abstraction has 2604 states and 11201 transitions. [2021-07-13 19:54:21,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:21,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 11201 transitions. [2021-07-13 19:54:21,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:21,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:21,530 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:21,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:21,731 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:21,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:21,731 INFO L82 PathProgramCache]: Analyzing trace with hash 639094158, now seen corresponding path program 14 times [2021-07-13 19:54:21,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:21,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810239615] [2021-07-13 19:54:21,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:21,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:21,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810239615] [2021-07-13 19:54:21,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810239615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:21,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127382588] [2021-07-13 19:54:21,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:21,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:21,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:21,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:21,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:21,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:21,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:54:21,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:21,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:21,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:21,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:54:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:22,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127382588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:22,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:22,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:54:22,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644843621] [2021-07-13 19:54:22,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:22,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:22,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:22,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:22,051 INFO L87 Difference]: Start difference. First operand 2604 states and 11201 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:22,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:22,633 INFO L93 Difference]: Finished difference Result 2956 states and 12436 transitions. [2021-07-13 19:54:22,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:54:22,634 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:22,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:22,642 INFO L225 Difference]: With dead ends: 2956 [2021-07-13 19:54:22,642 INFO L226 Difference]: Without dead ends: 2942 [2021-07-13 19:54:22,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 522.7ms TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:54:22,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-07-13 19:54:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2597. [2021-07-13 19:54:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 4.305469953775039) internal successors, (11177), 2596 states have internal predecessors, (11177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:22,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 11177 transitions. [2021-07-13 19:54:22,688 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 11177 transitions. Word has length 29 [2021-07-13 19:54:22,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:22,688 INFO L482 AbstractCegarLoop]: Abstraction has 2597 states and 11177 transitions. [2021-07-13 19:54:22,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:22,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 11177 transitions. [2021-07-13 19:54:22,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:22,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:22,692 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:22,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:22,908 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:22,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:22,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2040866216, now seen corresponding path program 15 times [2021-07-13 19:54:22,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:22,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936273856] [2021-07-13 19:54:22,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:23,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:23,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936273856] [2021-07-13 19:54:23,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936273856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:23,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241865684] [2021-07-13 19:54:23,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:23,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:54:23,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:23,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:54:23,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:23,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:23,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:54:23,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:23,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:23,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:23,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-07-13 19:54:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:23,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241865684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:23,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:23,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:54:23,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362416462] [2021-07-13 19:54:23,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:23,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:23,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:23,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:23,206 INFO L87 Difference]: Start difference. First operand 2597 states and 11177 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:23,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:23,688 INFO L93 Difference]: Finished difference Result 3119 states and 13036 transitions. [2021-07-13 19:54:23,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:54:23,688 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:23,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:23,697 INFO L225 Difference]: With dead ends: 3119 [2021-07-13 19:54:23,697 INFO L226 Difference]: Without dead ends: 3096 [2021-07-13 19:54:23,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 425.1ms TimeCoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:54:23,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2021-07-13 19:54:23,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 2534. [2021-07-13 19:54:23,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 4.3024082116067905) internal successors, (10898), 2533 states have internal predecessors, (10898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 10898 transitions. [2021-07-13 19:54:23,743 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 10898 transitions. Word has length 29 [2021-07-13 19:54:23,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:23,743 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 10898 transitions. [2021-07-13 19:54:23,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:23,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 10898 transitions. [2021-07-13 19:54:23,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:23,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:23,747 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:23,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:23,948 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:23,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:23,948 INFO L82 PathProgramCache]: Analyzing trace with hash 548011288, now seen corresponding path program 16 times [2021-07-13 19:54:23,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:23,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322276841] [2021-07-13 19:54:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:24,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:24,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322276841] [2021-07-13 19:54:24,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322276841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:24,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362322149] [2021-07-13 19:54:24,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:24,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:24,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:24,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:24,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:24,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:24,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:24,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:24,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:24,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-13 19:54:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:24,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362322149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:24,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:24,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-07-13 19:54:24,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123816950] [2021-07-13 19:54:24,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:54:24,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:24,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:54:24,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:54:24,220 INFO L87 Difference]: Start difference. First operand 2534 states and 10898 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:24,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:24,428 INFO L93 Difference]: Finished difference Result 2643 states and 11266 transitions. [2021-07-13 19:54:24,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:54:24,428 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:24,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:24,434 INFO L225 Difference]: With dead ends: 2643 [2021-07-13 19:54:24,434 INFO L226 Difference]: Without dead ends: 2628 [2021-07-13 19:54:24,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 212.6ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:24,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2021-07-13 19:54:24,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 2534. [2021-07-13 19:54:24,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 4.3024082116067905) internal successors, (10898), 2533 states have internal predecessors, (10898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:24,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 10898 transitions. [2021-07-13 19:54:24,472 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 10898 transitions. Word has length 29 [2021-07-13 19:54:24,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:24,472 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 10898 transitions. [2021-07-13 19:54:24,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:24,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 10898 transitions. [2021-07-13 19:54:24,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:24,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:24,476 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:24,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:24,677 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:24,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:24,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1085301608, now seen corresponding path program 17 times [2021-07-13 19:54:24,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:24,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887484372] [2021-07-13 19:54:24,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:24,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:24,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887484372] [2021-07-13 19:54:24,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887484372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:24,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503948140] [2021-07-13 19:54:24,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:24,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:54:24,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:24,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:24,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:24,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:24,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:24,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:24,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:24,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-13 19:54:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:24,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503948140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:24,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:24,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-07-13 19:54:24,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65713275] [2021-07-13 19:54:24,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:54:24,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:24,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:54:24,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:54:24,952 INFO L87 Difference]: Start difference. First operand 2534 states and 10898 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:25,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:25,124 INFO L93 Difference]: Finished difference Result 2986 states and 12678 transitions. [2021-07-13 19:54:25,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:54:25,124 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:25,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:25,132 INFO L225 Difference]: With dead ends: 2986 [2021-07-13 19:54:25,132 INFO L226 Difference]: Without dead ends: 2972 [2021-07-13 19:54:25,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:25,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-07-13 19:54:25,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2522. [2021-07-13 19:54:25,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 4.308607695358985) internal successors, (10862), 2521 states have internal predecessors, (10862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:25,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 10862 transitions. [2021-07-13 19:54:25,174 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 10862 transitions. Word has length 29 [2021-07-13 19:54:25,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:25,174 INFO L482 AbstractCegarLoop]: Abstraction has 2522 states and 10862 transitions. [2021-07-13 19:54:25,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:25,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 10862 transitions. [2021-07-13 19:54:25,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:25,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:25,179 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:25,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:25,379 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:25,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:25,379 INFO L82 PathProgramCache]: Analyzing trace with hash -865854478, now seen corresponding path program 5 times [2021-07-13 19:54:25,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:25,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375866777] [2021-07-13 19:54:25,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:25,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:25,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375866777] [2021-07-13 19:54:25,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375866777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:25,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474493637] [2021-07-13 19:54:25,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:25,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:54:25,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:25,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:25,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:25,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:25,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:25,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:25,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:25,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-13 19:54:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:25,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474493637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:25,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:25,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 19:54:25,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791755513] [2021-07-13 19:54:25,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:54:25,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:25,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:54:25,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:54:25,629 INFO L87 Difference]: Start difference. First operand 2522 states and 10862 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:25,882 INFO L93 Difference]: Finished difference Result 3129 states and 13232 transitions. [2021-07-13 19:54:25,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:54:25,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:25,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:25,891 INFO L225 Difference]: With dead ends: 3129 [2021-07-13 19:54:25,891 INFO L226 Difference]: Without dead ends: 3110 [2021-07-13 19:54:25,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 235.9ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:25,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2021-07-13 19:54:25,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 2661. [2021-07-13 19:54:25,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 4.300375939849624) internal successors, (11439), 2660 states have internal predecessors, (11439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:25,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 11439 transitions. [2021-07-13 19:54:25,934 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 11439 transitions. Word has length 29 [2021-07-13 19:54:25,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:25,934 INFO L482 AbstractCegarLoop]: Abstraction has 2661 states and 11439 transitions. [2021-07-13 19:54:25,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:25,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 11439 transitions. [2021-07-13 19:54:25,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:25,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:25,938 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:26,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-13 19:54:26,139 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:26,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:26,139 INFO L82 PathProgramCache]: Analyzing trace with hash 556500348, now seen corresponding path program 6 times [2021-07-13 19:54:26,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:26,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361198560] [2021-07-13 19:54:26,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:26,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:26,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361198560] [2021-07-13 19:54:26,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361198560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:26,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234898853] [2021-07-13 19:54:26,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:26,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:54:26,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:26,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:54:26,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:26,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:26,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:54:26,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:26,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:26,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:26,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-07-13 19:54:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:26,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234898853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:26,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:26,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 19:54:26,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511916607] [2021-07-13 19:54:26,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:54:26,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:26,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:54:26,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:54:26,465 INFO L87 Difference]: Start difference. First operand 2661 states and 11439 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:26,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:26,897 INFO L93 Difference]: Finished difference Result 3480 states and 14546 transitions. [2021-07-13 19:54:26,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:54:26,897 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:26,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:26,905 INFO L225 Difference]: With dead ends: 3480 [2021-07-13 19:54:26,905 INFO L226 Difference]: Without dead ends: 3449 [2021-07-13 19:54:26,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 437.3ms TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:54:26,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3449 states. [2021-07-13 19:54:26,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3449 to 2561. [2021-07-13 19:54:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 4.305078125) internal successors, (11021), 2560 states have internal predecessors, (11021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:26,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 11021 transitions. [2021-07-13 19:54:26,947 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 11021 transitions. Word has length 29 [2021-07-13 19:54:26,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:26,947 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 11021 transitions. [2021-07-13 19:54:26,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:26,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 11021 transitions. [2021-07-13 19:54:26,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:26,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:26,951 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:27,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:27,152 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:27,152 INFO L82 PathProgramCache]: Analyzing trace with hash -2106272904, now seen corresponding path program 7 times [2021-07-13 19:54:27,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:27,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550911431] [2021-07-13 19:54:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:27,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:27,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550911431] [2021-07-13 19:54:27,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550911431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:27,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340462838] [2021-07-13 19:54:27,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:27,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:27,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:27,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:27,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:27,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:27,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:27,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-13 19:54:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:27,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340462838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:27,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:27,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:54:27,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935043214] [2021-07-13 19:54:27,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:54:27,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:27,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:54:27,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:54:27,404 INFO L87 Difference]: Start difference. First operand 2561 states and 11021 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:27,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:27,662 INFO L93 Difference]: Finished difference Result 2679 states and 11423 transitions. [2021-07-13 19:54:27,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:54:27,662 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:27,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:27,669 INFO L225 Difference]: With dead ends: 2679 [2021-07-13 19:54:27,669 INFO L226 Difference]: Without dead ends: 2664 [2021-07-13 19:54:27,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 232.3ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:54:27,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-07-13 19:54:27,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2537. [2021-07-13 19:54:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2536 states have (on average 4.306782334384858) internal successors, (10922), 2536 states have internal predecessors, (10922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 10922 transitions. [2021-07-13 19:54:27,707 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 10922 transitions. Word has length 29 [2021-07-13 19:54:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:27,707 INFO L482 AbstractCegarLoop]: Abstraction has 2537 states and 10922 transitions. [2021-07-13 19:54:27,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:27,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 10922 transitions. [2021-07-13 19:54:27,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:27,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:27,711 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:27,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-13 19:54:27,912 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:27,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:27,912 INFO L82 PathProgramCache]: Analyzing trace with hash 382055414, now seen corresponding path program 8 times [2021-07-13 19:54:27,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:27,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851564283] [2021-07-13 19:54:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:28,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:28,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851564283] [2021-07-13 19:54:28,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851564283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:28,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179081623] [2021-07-13 19:54:28,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:28,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:28,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:28,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:28,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:28,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:28,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:54:28,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:28,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:28,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:28,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:54:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:28,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179081623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:28,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:28,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 19:54:28,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273191674] [2021-07-13 19:54:28,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:28,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:28,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:28,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:28,269 INFO L87 Difference]: Start difference. First operand 2537 states and 10922 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:29,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:29,208 INFO L93 Difference]: Finished difference Result 3319 states and 13757 transitions. [2021-07-13 19:54:29,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:54:29,208 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:29,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:29,217 INFO L225 Difference]: With dead ends: 3319 [2021-07-13 19:54:29,217 INFO L226 Difference]: Without dead ends: 3273 [2021-07-13 19:54:29,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 799.3ms TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:54:29,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-07-13 19:54:29,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2685. [2021-07-13 19:54:29,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 2684 states have (on average 4.2831594634873325) internal successors, (11496), 2684 states have internal predecessors, (11496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:29,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 11496 transitions. [2021-07-13 19:54:29,280 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 11496 transitions. Word has length 29 [2021-07-13 19:54:29,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:29,280 INFO L482 AbstractCegarLoop]: Abstraction has 2685 states and 11496 transitions. [2021-07-13 19:54:29,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:29,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 11496 transitions. [2021-07-13 19:54:29,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:29,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:29,284 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:29,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 19:54:29,485 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:29,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:29,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1804410240, now seen corresponding path program 9 times [2021-07-13 19:54:29,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:29,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057171181] [2021-07-13 19:54:29,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:29,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:29,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057171181] [2021-07-13 19:54:29,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057171181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:29,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740576052] [2021-07-13 19:54:29,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:29,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:54:29,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:29,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:54:29,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:29,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:29,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:54:29,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:29,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:29,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:29,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-07-13 19:54:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:29,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740576052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:29,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:29,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 19:54:29,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142068452] [2021-07-13 19:54:29,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:54:29,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:29,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:54:29,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:54:29,794 INFO L87 Difference]: Start difference. First operand 2685 states and 11496 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:30,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:30,176 INFO L93 Difference]: Finished difference Result 3480 states and 14560 transitions. [2021-07-13 19:54:30,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:54:30,177 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:30,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:30,185 INFO L225 Difference]: With dead ends: 3480 [2021-07-13 19:54:30,185 INFO L226 Difference]: Without dead ends: 3407 [2021-07-13 19:54:30,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 383.3ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:54:30,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-07-13 19:54:30,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 2621. [2021-07-13 19:54:30,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2621 states, 2620 states have (on average 4.307251908396947) internal successors, (11285), 2620 states have internal predecessors, (11285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:30,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2621 states to 2621 states and 11285 transitions. [2021-07-13 19:54:30,228 INFO L78 Accepts]: Start accepts. Automaton has 2621 states and 11285 transitions. Word has length 29 [2021-07-13 19:54:30,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:30,228 INFO L482 AbstractCegarLoop]: Abstraction has 2621 states and 11285 transitions. [2021-07-13 19:54:30,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:30,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2621 states and 11285 transitions. [2021-07-13 19:54:30,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:30,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:30,232 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:30,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:30,433 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:30,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:30,433 INFO L82 PathProgramCache]: Analyzing trace with hash 794590770, now seen corresponding path program 10 times [2021-07-13 19:54:30,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:30,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171647982] [2021-07-13 19:54:30,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:30,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:30,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171647982] [2021-07-13 19:54:30,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171647982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:30,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455627590] [2021-07-13 19:54:30,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:30,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:30,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:30,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:30,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:30,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-13 19:54:30,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:30,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:30,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:30,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 19:54:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:30,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455627590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:30,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:30,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 19:54:30,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228537899] [2021-07-13 19:54:30,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:54:30,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:30,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:54:30,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:54:30,648 INFO L87 Difference]: Start difference. First operand 2621 states and 11285 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:30,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:30,904 INFO L93 Difference]: Finished difference Result 2765 states and 11775 transitions. [2021-07-13 19:54:30,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:54:30,904 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:30,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:30,911 INFO L225 Difference]: With dead ends: 2765 [2021-07-13 19:54:30,911 INFO L226 Difference]: Without dead ends: 2746 [2021-07-13 19:54:30,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:54:30,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-07-13 19:54:30,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2618. [2021-07-13 19:54:30,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 2617 states have (on average 4.30875047764616) internal successors, (11276), 2617 states have internal predecessors, (11276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:30,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 11276 transitions. [2021-07-13 19:54:30,949 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 11276 transitions. Word has length 29 [2021-07-13 19:54:30,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:30,949 INFO L482 AbstractCegarLoop]: Abstraction has 2618 states and 11276 transitions. [2021-07-13 19:54:30,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:30,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 11276 transitions. [2021-07-13 19:54:30,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:30,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:30,953 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:31,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:31,154 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:31,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:31,154 INFO L82 PathProgramCache]: Analyzing trace with hash -433376052, now seen corresponding path program 18 times [2021-07-13 19:54:31,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:31,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483913282] [2021-07-13 19:54:31,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:31,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:31,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483913282] [2021-07-13 19:54:31,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483913282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:31,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259144116] [2021-07-13 19:54:31,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:31,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:54:31,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:31,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:54:31,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:31,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:31,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:54:31,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:31,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:31,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:31,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-07-13 19:54:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:31,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259144116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:31,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:31,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:54:31,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542265928] [2021-07-13 19:54:31,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:54:31,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:31,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:54:31,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:54:31,398 INFO L87 Difference]: Start difference. First operand 2618 states and 11276 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:31,808 INFO L93 Difference]: Finished difference Result 3558 states and 14884 transitions. [2021-07-13 19:54:31,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:54:31,809 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:31,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:31,818 INFO L225 Difference]: With dead ends: 3558 [2021-07-13 19:54:31,818 INFO L226 Difference]: Without dead ends: 3539 [2021-07-13 19:54:31,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 328.7ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:54:31,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3539 states. [2021-07-13 19:54:31,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3539 to 2740. [2021-07-13 19:54:31,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2740 states, 2739 states have (on average 4.306316173786053) internal successors, (11795), 2739 states have internal predecessors, (11795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:31,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2740 states to 2740 states and 11795 transitions. [2021-07-13 19:54:31,863 INFO L78 Accepts]: Start accepts. Automaton has 2740 states and 11795 transitions. Word has length 29 [2021-07-13 19:54:31,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:31,863 INFO L482 AbstractCegarLoop]: Abstraction has 2740 states and 11795 transitions. [2021-07-13 19:54:31,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:31,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2740 states and 11795 transitions. [2021-07-13 19:54:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:31,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:31,868 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:32,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:32,069 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:32,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:32,069 INFO L82 PathProgramCache]: Analyzing trace with hash 869896554, now seen corresponding path program 19 times [2021-07-13 19:54:32,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:32,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083037523] [2021-07-13 19:54:32,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:32,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:32,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083037523] [2021-07-13 19:54:32,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083037523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:32,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360850287] [2021-07-13 19:54:32,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:32,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:32,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:32,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:32,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:32,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:32,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:32,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:22 [2021-07-13 19:54:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:32,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360850287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:32,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:32,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-07-13 19:54:32,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002623777] [2021-07-13 19:54:32,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:54:32,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:32,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:54:32,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:54:32,278 INFO L87 Difference]: Start difference. First operand 2740 states and 11795 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:32,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:32,516 INFO L93 Difference]: Finished difference Result 3134 states and 13216 transitions. [2021-07-13 19:54:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:54:32,517 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:32,524 INFO L225 Difference]: With dead ends: 3134 [2021-07-13 19:54:32,524 INFO L226 Difference]: Without dead ends: 3054 [2021-07-13 19:54:32,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 155.4ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:32,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3054 states. [2021-07-13 19:54:32,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3054 to 2695. [2021-07-13 19:54:32,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2694 states have (on average 4.310690423162583) internal successors, (11613), 2694 states have internal predecessors, (11613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:32,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 11613 transitions. [2021-07-13 19:54:32,568 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 11613 transitions. Word has length 29 [2021-07-13 19:54:32,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:32,568 INFO L482 AbstractCegarLoop]: Abstraction has 2695 states and 11613 transitions. [2021-07-13 19:54:32,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 11613 transitions. [2021-07-13 19:54:32,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:32,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:32,573 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:32,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-07-13 19:54:32,773 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:32,774 INFO L82 PathProgramCache]: Analyzing trace with hash 279969416, now seen corresponding path program 20 times [2021-07-13 19:54:32,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:32,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13394592] [2021-07-13 19:54:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:32,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:32,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13394592] [2021-07-13 19:54:32,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13394592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:32,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25572753] [2021-07-13 19:54:32,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:32,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:32,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:32,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:54:32,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:32,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:32,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:54:32,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:32,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:32,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:32,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-07-13 19:54:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:32,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25572753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:32,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:32,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 19:54:32,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896234920] [2021-07-13 19:54:32,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:54:32,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:32,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:54:32,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:54:32,951 INFO L87 Difference]: Start difference. First operand 2695 states and 11613 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:33,104 INFO L93 Difference]: Finished difference Result 2824 states and 12065 transitions. [2021-07-13 19:54:33,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:54:33,104 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:33,111 INFO L225 Difference]: With dead ends: 2824 [2021-07-13 19:54:33,111 INFO L226 Difference]: Without dead ends: 2805 [2021-07-13 19:54:33,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:54:33,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2021-07-13 19:54:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2692. [2021-07-13 19:54:33,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2691 states have (on average 4.311780007432182) internal successors, (11603), 2691 states have internal predecessors, (11603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 11603 transitions. [2021-07-13 19:54:33,151 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 11603 transitions. Word has length 29 [2021-07-13 19:54:33,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:33,151 INFO L482 AbstractCegarLoop]: Abstraction has 2692 states and 11603 transitions. [2021-07-13 19:54:33,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:33,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 11603 transitions. [2021-07-13 19:54:33,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:33,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:33,156 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:33,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:33,356 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:33,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:33,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1672937528, now seen corresponding path program 21 times [2021-07-13 19:54:33,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:33,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856831392] [2021-07-13 19:54:33,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:33,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:33,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856831392] [2021-07-13 19:54:33,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856831392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:33,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577679850] [2021-07-13 19:54:33,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:33,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:54:33,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:33,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:33,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:33,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:33,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:54:33,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:33,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:33,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:33,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:54:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:33,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577679850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:33,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:33,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:54:33,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287384630] [2021-07-13 19:54:33,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:54:33,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:33,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:54:33,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:54:33,619 INFO L87 Difference]: Start difference. First operand 2692 states and 11603 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:34,056 INFO L93 Difference]: Finished difference Result 3253 states and 13768 transitions. [2021-07-13 19:54:34,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:54:34,056 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:34,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:34,064 INFO L225 Difference]: With dead ends: 3253 [2021-07-13 19:54:34,064 INFO L226 Difference]: Without dead ends: 3234 [2021-07-13 19:54:34,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 351.6ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:54:34,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2021-07-13 19:54:34,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 2796. [2021-07-13 19:54:34,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 4.308407871198569) internal successors, (12042), 2795 states have internal predecessors, (12042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:34,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 12042 transitions. [2021-07-13 19:54:34,110 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 12042 transitions. Word has length 29 [2021-07-13 19:54:34,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:34,110 INFO L482 AbstractCegarLoop]: Abstraction has 2796 states and 12042 transitions. [2021-07-13 19:54:34,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:34,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 12042 transitions. [2021-07-13 19:54:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:34,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:34,115 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:34,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-07-13 19:54:34,329 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:34,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:34,329 INFO L82 PathProgramCache]: Analyzing trace with hash -369664922, now seen corresponding path program 22 times [2021-07-13 19:54:34,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:34,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058123817] [2021-07-13 19:54:34,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:34,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:34,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058123817] [2021-07-13 19:54:34,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058123817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:34,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052338243] [2021-07-13 19:54:34,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:34,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:34,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:34,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:34,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:34,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:34,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:34,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:34,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:34,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:34,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:24 [2021-07-13 19:54:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:34,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052338243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:34,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:34,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-07-13 19:54:34,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151824115] [2021-07-13 19:54:34,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:54:34,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:34,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:54:34,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:54:34,537 INFO L87 Difference]: Start difference. First operand 2796 states and 12042 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:34,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:34,739 INFO L93 Difference]: Finished difference Result 3178 states and 13411 transitions. [2021-07-13 19:54:34,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:54:34,740 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:34,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:34,748 INFO L225 Difference]: With dead ends: 3178 [2021-07-13 19:54:34,748 INFO L226 Difference]: Without dead ends: 3092 [2021-07-13 19:54:34,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:34,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3092 states. [2021-07-13 19:54:34,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3092 to 2716. [2021-07-13 19:54:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 4.311233885819521) internal successors, (11705), 2715 states have internal predecessors, (11705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:34,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 11705 transitions. [2021-07-13 19:54:34,790 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 11705 transitions. Word has length 29 [2021-07-13 19:54:34,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:34,790 INFO L482 AbstractCegarLoop]: Abstraction has 2716 states and 11705 transitions. [2021-07-13 19:54:34,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:34,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 11705 transitions. [2021-07-13 19:54:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:34,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:34,795 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:34,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:34,996 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:34,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:34,996 INFO L82 PathProgramCache]: Analyzing trace with hash -2129141234, now seen corresponding path program 23 times [2021-07-13 19:54:34,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:34,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064554662] [2021-07-13 19:54:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:35,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:35,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:35,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064554662] [2021-07-13 19:54:35,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064554662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:35,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756406021] [2021-07-13 19:54:35,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:35,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:35,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:35,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:35,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:35,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:35,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:35,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:35,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:35,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-13 19:54:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:35,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756406021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:35,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:35,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 19:54:35,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202288737] [2021-07-13 19:54:35,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:54:35,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:35,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:54:35,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:54:35,186 INFO L87 Difference]: Start difference. First operand 2716 states and 11705 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:35,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:35,336 INFO L93 Difference]: Finished difference Result 2828 states and 12084 transitions. [2021-07-13 19:54:35,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:54:35,336 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:35,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:35,359 INFO L225 Difference]: With dead ends: 2828 [2021-07-13 19:54:35,359 INFO L226 Difference]: Without dead ends: 2813 [2021-07-13 19:54:35,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:54:35,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2021-07-13 19:54:35,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 2713. [2021-07-13 19:54:35,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 4.312684365781711) internal successors, (11696), 2712 states have internal predecessors, (11696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:35,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 11696 transitions. [2021-07-13 19:54:35,401 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 11696 transitions. Word has length 29 [2021-07-13 19:54:35,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:35,401 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 11696 transitions. [2021-07-13 19:54:35,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:35,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 11696 transitions. [2021-07-13 19:54:35,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:35,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:35,407 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:35,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:35,607 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:35,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:35,607 INFO L82 PathProgramCache]: Analyzing trace with hash 25278284, now seen corresponding path program 24 times [2021-07-13 19:54:35,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:35,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912759402] [2021-07-13 19:54:35,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:35,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:35,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912759402] [2021-07-13 19:54:35,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912759402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:35,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205165180] [2021-07-13 19:54:35,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:35,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:54:35,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:35,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:35,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:35,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:35,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-07-13 19:54:35,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:35,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:35,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:35,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-13 19:54:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:35,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205165180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:35,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:35,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:54:35,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899514886] [2021-07-13 19:54:35,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:54:35,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:35,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:54:35,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:54:35,860 INFO L87 Difference]: Start difference. First operand 2713 states and 11696 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:36,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:36,272 INFO L93 Difference]: Finished difference Result 3335 states and 14089 transitions. [2021-07-13 19:54:36,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:54:36,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:36,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:36,281 INFO L225 Difference]: With dead ends: 3335 [2021-07-13 19:54:36,281 INFO L226 Difference]: Without dead ends: 3316 [2021-07-13 19:54:36,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 319.0ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:54:36,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3316 states. [2021-07-13 19:54:36,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3316 to 2828. [2021-07-13 19:54:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 4.305624336752741) internal successors, (12172), 2827 states have internal predecessors, (12172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:36,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 12172 transitions. [2021-07-13 19:54:36,330 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 12172 transitions. Word has length 29 [2021-07-13 19:54:36,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:36,330 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 12172 transitions. [2021-07-13 19:54:36,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:36,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 12172 transitions. [2021-07-13 19:54:36,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:36,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:36,335 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:36,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-07-13 19:54:36,536 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:36,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:36,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1328550890, now seen corresponding path program 25 times [2021-07-13 19:54:36,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:36,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804646627] [2021-07-13 19:54:36,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:36,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:36,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804646627] [2021-07-13 19:54:36,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804646627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:36,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630918857] [2021-07-13 19:54:36,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:36,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:36,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:36,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:36,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 19:54:36,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:36,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:36,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:36,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:24 [2021-07-13 19:54:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:36,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630918857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:36,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:36,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 11 [2021-07-13 19:54:36,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46245632] [2021-07-13 19:54:36,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:54:36,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:36,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:54:36,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:54:36,737 INFO L87 Difference]: Start difference. First operand 2828 states and 12172 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:37,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:37,063 INFO L93 Difference]: Finished difference Result 3219 states and 13551 transitions. [2021-07-13 19:54:37,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:54:37,063 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:37,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:37,071 INFO L225 Difference]: With dead ends: 3219 [2021-07-13 19:54:37,071 INFO L226 Difference]: Without dead ends: 3133 [2021-07-13 19:54:37,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 213.9ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:37,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3133 states. [2021-07-13 19:54:37,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3133 to 2748. [2021-07-13 19:54:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 4.308336366945759) internal successors, (11835), 2747 states have internal predecessors, (11835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:37,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 11835 transitions. [2021-07-13 19:54:37,113 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 11835 transitions. Word has length 29 [2021-07-13 19:54:37,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:37,113 INFO L482 AbstractCegarLoop]: Abstraction has 2748 states and 11835 transitions. [2021-07-13 19:54:37,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:37,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 11835 transitions. [2021-07-13 19:54:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:37,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:37,118 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:37,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-13 19:54:37,319 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:37,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:37,319 INFO L82 PathProgramCache]: Analyzing trace with hash -430925422, now seen corresponding path program 26 times [2021-07-13 19:54:37,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:37,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410195739] [2021-07-13 19:54:37,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:37,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:37,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410195739] [2021-07-13 19:54:37,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410195739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:37,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147255929] [2021-07-13 19:54:37,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:37,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:37,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:37,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:37,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:37,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:37,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-07-13 19:54:37,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:37,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:37,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:37,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-13 19:54:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:37,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147255929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:37,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:37,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:54:37,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652285188] [2021-07-13 19:54:37,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:54:37,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:37,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:54:37,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:54:37,588 INFO L87 Difference]: Start difference. First operand 2748 states and 11835 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:38,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:38,113 INFO L93 Difference]: Finished difference Result 2976 states and 12614 transitions. [2021-07-13 19:54:38,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:54:38,113 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:38,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:38,121 INFO L225 Difference]: With dead ends: 2976 [2021-07-13 19:54:38,121 INFO L226 Difference]: Without dead ends: 2961 [2021-07-13 19:54:38,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 418.6ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:54:38,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2021-07-13 19:54:38,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 2724. [2021-07-13 19:54:38,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 4.3088505325009185) internal successors, (11733), 2723 states have internal predecessors, (11733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:38,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 11733 transitions. [2021-07-13 19:54:38,167 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 11733 transitions. Word has length 29 [2021-07-13 19:54:38,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:38,167 INFO L482 AbstractCegarLoop]: Abstraction has 2724 states and 11733 transitions. [2021-07-13 19:54:38,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:38,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 11733 transitions. [2021-07-13 19:54:38,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:38,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:38,172 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:38,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:38,373 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:38,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:38,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1138592478, now seen corresponding path program 27 times [2021-07-13 19:54:38,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:38,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095907991] [2021-07-13 19:54:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:38,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:38,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095907991] [2021-07-13 19:54:38,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095907991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:38,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311034491] [2021-07-13 19:54:38,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:38,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:54:38,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:38,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:38,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:38,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:38,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-07-13 19:54:38,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:38,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:38,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:38,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-07-13 19:54:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:38,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311034491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:38,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:38,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 19:54:38,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979201770] [2021-07-13 19:54:38,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:38,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:38,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:38,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:38,691 INFO L87 Difference]: Start difference. First operand 2724 states and 11733 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:39,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:39,029 INFO L93 Difference]: Finished difference Result 2863 states and 12191 transitions. [2021-07-13 19:54:39,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:54:39,029 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:39,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:39,037 INFO L225 Difference]: With dead ends: 2863 [2021-07-13 19:54:39,037 INFO L226 Difference]: Without dead ends: 2848 [2021-07-13 19:54:39,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 299.6ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:39,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2021-07-13 19:54:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 2732. [2021-07-13 19:54:39,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2731 states have (on average 4.304284145001831) internal successors, (11755), 2731 states have internal predecessors, (11755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 11755 transitions. [2021-07-13 19:54:39,079 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 11755 transitions. Word has length 29 [2021-07-13 19:54:39,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:39,079 INFO L482 AbstractCegarLoop]: Abstraction has 2732 states and 11755 transitions. [2021-07-13 19:54:39,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:39,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 11755 transitions. [2021-07-13 19:54:39,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:39,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:39,084 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:39,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-13 19:54:39,284 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:39,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:39,284 INFO L82 PathProgramCache]: Analyzing trace with hash -324196480, now seen corresponding path program 11 times [2021-07-13 19:54:39,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:39,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690261883] [2021-07-13 19:54:39,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:39,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:39,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690261883] [2021-07-13 19:54:39,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690261883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:39,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105088137] [2021-07-13 19:54:39,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:39,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:39,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:39,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:39,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:39,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:39,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:54:39,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:39,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:39,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:39,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-07-13 19:54:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:39,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105088137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:39,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:39,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 19:54:39,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849555134] [2021-07-13 19:54:39,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:54:39,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:39,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:54:39,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:54:39,524 INFO L87 Difference]: Start difference. First operand 2732 states and 11755 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:39,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:39,790 INFO L93 Difference]: Finished difference Result 3429 states and 14478 transitions. [2021-07-13 19:54:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:54:39,790 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:39,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:39,799 INFO L225 Difference]: With dead ends: 3429 [2021-07-13 19:54:39,799 INFO L226 Difference]: Without dead ends: 3410 [2021-07-13 19:54:39,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 205.2ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:39,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2021-07-13 19:54:39,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 2875. [2021-07-13 19:54:39,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2875 states, 2874 states have (on average 4.293667362560891) internal successors, (12340), 2874 states have internal predecessors, (12340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:39,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 12340 transitions. [2021-07-13 19:54:39,867 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 12340 transitions. Word has length 29 [2021-07-13 19:54:39,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:39,867 INFO L482 AbstractCegarLoop]: Abstraction has 2875 states and 12340 transitions. [2021-07-13 19:54:39,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:39,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 12340 transitions. [2021-07-13 19:54:39,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:39,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:39,872 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:40,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 19:54:40,073 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:40,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:40,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1098158346, now seen corresponding path program 12 times [2021-07-13 19:54:40,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:40,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153647158] [2021-07-13 19:54:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:40,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:40,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153647158] [2021-07-13 19:54:40,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153647158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:40,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674395595] [2021-07-13 19:54:40,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:40,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:54:40,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:40,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:40,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:40,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:40,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-07-13 19:54:40,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:40,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:40,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:40,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-13 19:54:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:40,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674395595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:40,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:40,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 19:54:40,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161603371] [2021-07-13 19:54:40,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:54:40,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:40,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:54:40,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:54:40,373 INFO L87 Difference]: Start difference. First operand 2875 states and 12340 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:40,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:40,981 INFO L93 Difference]: Finished difference Result 3488 states and 14640 transitions. [2021-07-13 19:54:40,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:54:40,981 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:40,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:40,990 INFO L225 Difference]: With dead ends: 3488 [2021-07-13 19:54:40,990 INFO L226 Difference]: Without dead ends: 3457 [2021-07-13 19:54:40,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 554.4ms TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:54:40,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3457 states. [2021-07-13 19:54:41,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3457 to 2787. [2021-07-13 19:54:41,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 4.299353912419239) internal successors, (11978), 2786 states have internal predecessors, (11978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 11978 transitions. [2021-07-13 19:54:41,037 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 11978 transitions. Word has length 29 [2021-07-13 19:54:41,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:41,037 INFO L482 AbstractCegarLoop]: Abstraction has 2787 states and 11978 transitions. [2021-07-13 19:54:41,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:41,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 11978 transitions. [2021-07-13 19:54:41,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:41,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:41,042 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:41,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 19:54:41,243 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:41,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:41,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1564614906, now seen corresponding path program 13 times [2021-07-13 19:54:41,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:41,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627975183] [2021-07-13 19:54:41,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:41,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:41,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627975183] [2021-07-13 19:54:41,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627975183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:41,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130422676] [2021-07-13 19:54:41,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:41,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:41,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:41,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:41,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 19:54:41,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:41,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:41,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:41,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-07-13 19:54:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:41,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130422676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:41,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:41,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:54:41,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220437957] [2021-07-13 19:54:41,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:54:41,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:41,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:54:41,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:54:41,520 INFO L87 Difference]: Start difference. First operand 2787 states and 11978 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:41,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:41,755 INFO L93 Difference]: Finished difference Result 2978 states and 12650 transitions. [2021-07-13 19:54:41,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:54:41,756 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:41,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:41,763 INFO L225 Difference]: With dead ends: 2978 [2021-07-13 19:54:41,763 INFO L226 Difference]: Without dead ends: 2963 [2021-07-13 19:54:41,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:41,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2021-07-13 19:54:41,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2775. [2021-07-13 19:54:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 4.30281182408075) internal successors, (11936), 2774 states have internal predecessors, (11936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 11936 transitions. [2021-07-13 19:54:41,807 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 11936 transitions. Word has length 29 [2021-07-13 19:54:41,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:41,808 INFO L482 AbstractCegarLoop]: Abstraction has 2775 states and 11936 transitions. [2021-07-13 19:54:41,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 11936 transitions. [2021-07-13 19:54:41,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:41,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:41,812 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:42,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:42,013 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:42,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:42,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1817023806, now seen corresponding path program 14 times [2021-07-13 19:54:42,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:42,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993038274] [2021-07-13 19:54:42,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:42,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:42,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:42,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993038274] [2021-07-13 19:54:42,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993038274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:42,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905441003] [2021-07-13 19:54:42,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:42,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:42,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:42,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:42,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:42,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:42,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-07-13 19:54:42,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:42,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:42,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:42,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-07-13 19:54:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:42,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905441003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:42,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:42,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 19:54:42,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118973897] [2021-07-13 19:54:42,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:42,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:42,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:42,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:42,294 INFO L87 Difference]: Start difference. First operand 2775 states and 11936 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:42,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:42,641 INFO L93 Difference]: Finished difference Result 2919 states and 12429 transitions. [2021-07-13 19:54:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:54:42,641 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:42,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:42,649 INFO L225 Difference]: With dead ends: 2919 [2021-07-13 19:54:42,649 INFO L226 Difference]: Without dead ends: 2904 [2021-07-13 19:54:42,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 295.5ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:42,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2021-07-13 19:54:42,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 2765. [2021-07-13 19:54:42,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2765 states, 2764 states have (on average 4.306801736613603) internal successors, (11904), 2764 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:42,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 11904 transitions. [2021-07-13 19:54:42,690 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 11904 transitions. Word has length 29 [2021-07-13 19:54:42,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:42,690 INFO L482 AbstractCegarLoop]: Abstraction has 2765 states and 11904 transitions. [2021-07-13 19:54:42,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:42,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 11904 transitions. [2021-07-13 19:54:42,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:42,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:42,695 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:42,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-07-13 19:54:42,896 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:42,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:42,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1349518276, now seen corresponding path program 15 times [2021-07-13 19:54:42,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:42,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770325351] [2021-07-13 19:54:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:43,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:43,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770325351] [2021-07-13 19:54:43,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770325351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:43,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835886962] [2021-07-13 19:54:43,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:43,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:54:43,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:43,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:43,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:43,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:43,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:54:43,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:43,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:43,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:43,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:54:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:43,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835886962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:43,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:43,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 19:54:43,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902664732] [2021-07-13 19:54:43,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:43,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:43,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:43,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:43,241 INFO L87 Difference]: Start difference. First operand 2765 states and 11904 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:44,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:44,272 INFO L93 Difference]: Finished difference Result 3739 states and 15661 transitions. [2021-07-13 19:54:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:54:44,273 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:44,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:44,282 INFO L225 Difference]: With dead ends: 3739 [2021-07-13 19:54:44,282 INFO L226 Difference]: Without dead ends: 3720 [2021-07-13 19:54:44,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 901.7ms TimeCoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:54:44,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2021-07-13 19:54:44,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 2904. [2021-07-13 19:54:44,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 4.300378918360317) internal successors, (12484), 2903 states have internal predecessors, (12484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:44,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 12484 transitions. [2021-07-13 19:54:44,346 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 12484 transitions. Word has length 29 [2021-07-13 19:54:44,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:44,346 INFO L482 AbstractCegarLoop]: Abstraction has 2904 states and 12484 transitions. [2021-07-13 19:54:44,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:44,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 12484 transitions. [2021-07-13 19:54:44,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:44,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:44,351 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:44,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-13 19:54:44,556 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:44,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:44,556 INFO L82 PathProgramCache]: Analyzing trace with hash 72836550, now seen corresponding path program 16 times [2021-07-13 19:54:44,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:44,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029179930] [2021-07-13 19:54:44,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:44,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:44,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029179930] [2021-07-13 19:54:44,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029179930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:44,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980750539] [2021-07-13 19:54:44,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:44,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:44,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:44,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:44,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:44,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:44,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:44,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:44,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:44,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-13 19:54:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:44,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980750539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:44,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:44,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 19:54:44,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361378825] [2021-07-13 19:54:44,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:54:44,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:44,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:54:44,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:54:44,819 INFO L87 Difference]: Start difference. First operand 2904 states and 12484 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:45,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:45,032 INFO L93 Difference]: Finished difference Result 3374 states and 14254 transitions. [2021-07-13 19:54:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:54:45,032 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:45,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:45,040 INFO L225 Difference]: With dead ends: 3374 [2021-07-13 19:54:45,040 INFO L226 Difference]: Without dead ends: 3343 [2021-07-13 19:54:45,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:45,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2021-07-13 19:54:45,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 2804. [2021-07-13 19:54:45,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2803 states have (on average 4.30467356403853) internal successors, (12066), 2803 states have internal predecessors, (12066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 12066 transitions. [2021-07-13 19:54:45,085 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 12066 transitions. Word has length 29 [2021-07-13 19:54:45,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:45,085 INFO L482 AbstractCegarLoop]: Abstraction has 2804 states and 12066 transitions. [2021-07-13 19:54:45,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 12066 transitions. [2021-07-13 19:54:45,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:45,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:45,089 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:45,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-13 19:54:45,290 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:45,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:45,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1705030594, now seen corresponding path program 17 times [2021-07-13 19:54:45,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:45,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782747774] [2021-07-13 19:54:45,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:45,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:45,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782747774] [2021-07-13 19:54:45,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782747774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:45,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189978796] [2021-07-13 19:54:45,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:45,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:45,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:45,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:45,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:45,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:45,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:45,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:45,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:45,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-13 19:54:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:45,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189978796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:45,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:45,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:54:45,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445634483] [2021-07-13 19:54:45,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:54:45,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:45,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:54:45,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:54:45,539 INFO L87 Difference]: Start difference. First operand 2804 states and 12066 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:45,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:45,750 INFO L93 Difference]: Finished difference Result 2926 states and 12487 transitions. [2021-07-13 19:54:45,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:54:45,750 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:45,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:45,758 INFO L225 Difference]: With dead ends: 2926 [2021-07-13 19:54:45,758 INFO L226 Difference]: Without dead ends: 2911 [2021-07-13 19:54:45,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:54:45,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2021-07-13 19:54:45,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2774. [2021-07-13 19:54:45,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 4.30580598629643) internal successors, (11940), 2773 states have internal predecessors, (11940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:45,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 11940 transitions. [2021-07-13 19:54:45,814 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 11940 transitions. Word has length 29 [2021-07-13 19:54:45,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:45,815 INFO L482 AbstractCegarLoop]: Abstraction has 2774 states and 11940 transitions. [2021-07-13 19:54:45,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:45,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 11940 transitions. [2021-07-13 19:54:45,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:45,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:45,819 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:46,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:46,020 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:46,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:46,020 INFO L82 PathProgramCache]: Analyzing trace with hash -101608384, now seen corresponding path program 18 times [2021-07-13 19:54:46,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:46,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750756674] [2021-07-13 19:54:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:46,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:46,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750756674] [2021-07-13 19:54:46,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750756674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:46,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661162554] [2021-07-13 19:54:46,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:46,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:54:46,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:46,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:46,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:46,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:46,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:54:46,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:46,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:46,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:46,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:54:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:46,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661162554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:46,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:46,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 19:54:46,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501449368] [2021-07-13 19:54:46,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:54:46,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:46,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:54:46,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:54:46,349 INFO L87 Difference]: Start difference. First operand 2774 states and 11940 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:47,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:47,194 INFO L93 Difference]: Finished difference Result 3811 states and 15865 transitions. [2021-07-13 19:54:47,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:54:47,194 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:47,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:47,204 INFO L225 Difference]: With dead ends: 3811 [2021-07-13 19:54:47,204 INFO L226 Difference]: Without dead ends: 3792 [2021-07-13 19:54:47,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 711.7ms TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:54:47,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2021-07-13 19:54:47,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 2904. [2021-07-13 19:54:47,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 4.299345504650362) internal successors, (12481), 2903 states have internal predecessors, (12481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:47,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 12481 transitions. [2021-07-13 19:54:47,273 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 12481 transitions. Word has length 29 [2021-07-13 19:54:47,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:47,273 INFO L482 AbstractCegarLoop]: Abstraction has 2904 states and 12481 transitions. [2021-07-13 19:54:47,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:47,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 12481 transitions. [2021-07-13 19:54:47,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:47,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:47,278 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:47,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:47,478 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:47,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:47,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1320746442, now seen corresponding path program 19 times [2021-07-13 19:54:47,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:47,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275128154] [2021-07-13 19:54:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:47,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:47,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275128154] [2021-07-13 19:54:47,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275128154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:47,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105941030] [2021-07-13 19:54:47,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:47,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:54:47,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:47,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:47,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:47,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:47,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:47,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-13 19:54:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:47,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105941030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:47,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:47,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 19:54:47,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845541472] [2021-07-13 19:54:47,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:54:47,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:47,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:54:47,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:54:47,730 INFO L87 Difference]: Start difference. First operand 2904 states and 12481 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:47,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:47,957 INFO L93 Difference]: Finished difference Result 3369 states and 14236 transitions. [2021-07-13 19:54:47,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:54:47,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:47,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:47,966 INFO L225 Difference]: With dead ends: 3369 [2021-07-13 19:54:47,967 INFO L226 Difference]: Without dead ends: 3338 [2021-07-13 19:54:47,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:54:47,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2021-07-13 19:54:48,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2804. [2021-07-13 19:54:48,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2803 states have (on average 4.3036032821976455) internal successors, (12063), 2803 states have internal predecessors, (12063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:48,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 12063 transitions. [2021-07-13 19:54:48,013 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 12063 transitions. Word has length 29 [2021-07-13 19:54:48,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:48,014 INFO L482 AbstractCegarLoop]: Abstraction has 2804 states and 12063 transitions. [2021-07-13 19:54:48,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:48,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 12063 transitions. [2021-07-13 19:54:48,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:54:48,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:48,018 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:48,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:48,219 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:48,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:48,219 INFO L82 PathProgramCache]: Analyzing trace with hash 310926972, now seen corresponding path program 20 times [2021-07-13 19:54:48,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:48,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996618032] [2021-07-13 19:54:48,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:48,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:48,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996618032] [2021-07-13 19:54:48,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996618032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:48,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981647768] [2021-07-13 19:54:48,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:48,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:48,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:48,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:48,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:48,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:48,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:54:48,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:48,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:48,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:48,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:22 [2021-07-13 19:54:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:48,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981647768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:48,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:48,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:54:48,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336515200] [2021-07-13 19:54:48,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:54:48,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:48,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:54:48,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:54:48,508 INFO L87 Difference]: Start difference. First operand 2804 states and 12063 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:48,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:48,772 INFO L93 Difference]: Finished difference Result 2918 states and 12429 transitions. [2021-07-13 19:54:48,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:54:48,773 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:54:48,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:48,780 INFO L225 Difference]: With dead ends: 2918 [2021-07-13 19:54:48,780 INFO L226 Difference]: Without dead ends: 2899 [2021-07-13 19:54:48,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 294.2ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:54:48,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-07-13 19:54:48,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2780. [2021-07-13 19:54:48,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2780 states, 2779 states have (on average 4.305145735876215) internal successors, (11964), 2779 states have internal predecessors, (11964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:48,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2780 states to 2780 states and 11964 transitions. [2021-07-13 19:54:48,819 INFO L78 Accepts]: Start accepts. Automaton has 2780 states and 11964 transitions. Word has length 29 [2021-07-13 19:54:48,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:48,819 INFO L482 AbstractCegarLoop]: Abstraction has 2780 states and 11964 transitions. [2021-07-13 19:54:48,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:48,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2780 states and 11964 transitions. [2021-07-13 19:54:48,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:54:48,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:48,823 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:49,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-13 19:54:49,024 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:49,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:49,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1155389859, now seen corresponding path program 36 times [2021-07-13 19:54:49,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:49,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557729744] [2021-07-13 19:54:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:49,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:49,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557729744] [2021-07-13 19:54:49,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557729744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:49,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702238459] [2021-07-13 19:54:49,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:49,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:54:49,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:49,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:54:49,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:49,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702238459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:49,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:49,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-07-13 19:54:49,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466570520] [2021-07-13 19:54:49,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:54:49,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:49,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:54:49,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:54:49,130 INFO L87 Difference]: Start difference. First operand 2780 states and 11964 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:49,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:49,210 INFO L93 Difference]: Finished difference Result 4234 states and 17658 transitions. [2021-07-13 19:54:49,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:54:49,210 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:54:49,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:49,220 INFO L225 Difference]: With dead ends: 4234 [2021-07-13 19:54:49,220 INFO L226 Difference]: Without dead ends: 4155 [2021-07-13 19:54:49,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:54:49,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-07-13 19:54:49,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3739. [2021-07-13 19:54:49,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3738 states have (on average 4.313001605136437) internal successors, (16122), 3738 states have internal predecessors, (16122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 16122 transitions. [2021-07-13 19:54:49,280 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 16122 transitions. Word has length 31 [2021-07-13 19:54:49,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:49,281 INFO L482 AbstractCegarLoop]: Abstraction has 3739 states and 16122 transitions. [2021-07-13 19:54:49,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:49,281 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 16122 transitions. [2021-07-13 19:54:49,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:54:49,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:49,287 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:49,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 19:54:49,488 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:49,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:49,488 INFO L82 PathProgramCache]: Analyzing trace with hash 2104598493, now seen corresponding path program 37 times [2021-07-13 19:54:49,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:49,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588380420] [2021-07-13 19:54:49,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:49,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:49,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588380420] [2021-07-13 19:54:49,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588380420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:49,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086077082] [2021-07-13 19:54:49,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:49,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:54:49,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:49,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086077082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:49,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:49,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 19:54:49,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072368904] [2021-07-13 19:54:49,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:54:49,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:49,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:54:49,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:54:49,595 INFO L87 Difference]: Start difference. First operand 3739 states and 16122 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:49,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:49,674 INFO L93 Difference]: Finished difference Result 4841 states and 20069 transitions. [2021-07-13 19:54:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:54:49,674 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:54:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:49,687 INFO L225 Difference]: With dead ends: 4841 [2021-07-13 19:54:49,687 INFO L226 Difference]: Without dead ends: 4724 [2021-07-13 19:54:49,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:54:49,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4724 states. [2021-07-13 19:54:49,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4724 to 3848. [2021-07-13 19:54:49,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3848 states, 3847 states have (on average 4.288536521965168) internal successors, (16498), 3847 states have internal predecessors, (16498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:49,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3848 states to 3848 states and 16498 transitions. [2021-07-13 19:54:49,765 INFO L78 Accepts]: Start accepts. Automaton has 3848 states and 16498 transitions. Word has length 31 [2021-07-13 19:54:49,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:49,766 INFO L482 AbstractCegarLoop]: Abstraction has 3848 states and 16498 transitions. [2021-07-13 19:54:49,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:49,766 INFO L276 IsEmpty]: Start isEmpty. Operand 3848 states and 16498 transitions. [2021-07-13 19:54:49,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:54:49,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:49,776 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:49,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 19:54:49,989 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:49,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:49,989 INFO L82 PathProgramCache]: Analyzing trace with hash -663936225, now seen corresponding path program 38 times [2021-07-13 19:54:49,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:49,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021484145] [2021-07-13 19:54:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:50,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:50,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021484145] [2021-07-13 19:54:50,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021484145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:50,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734425187] [2021-07-13 19:54:50,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:50,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:50,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:50,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:54:50,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:50,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734425187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:50,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:50,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 19:54:50,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137873105] [2021-07-13 19:54:50,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:54:50,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:50,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:54:50,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:54:50,100 INFO L87 Difference]: Start difference. First operand 3848 states and 16498 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:50,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:50,279 INFO L93 Difference]: Finished difference Result 6042 states and 24692 transitions. [2021-07-13 19:54:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:54:50,279 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:54:50,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:50,294 INFO L225 Difference]: With dead ends: 6042 [2021-07-13 19:54:50,294 INFO L226 Difference]: Without dead ends: 5723 [2021-07-13 19:54:50,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:54:50,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5723 states. [2021-07-13 19:54:50,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5723 to 4408. [2021-07-13 19:54:50,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4408 states, 4407 states have (on average 4.309507601542999) internal successors, (18992), 4407 states have internal predecessors, (18992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 18992 transitions. [2021-07-13 19:54:50,387 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 18992 transitions. Word has length 31 [2021-07-13 19:54:50,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:50,387 INFO L482 AbstractCegarLoop]: Abstraction has 4408 states and 18992 transitions. [2021-07-13 19:54:50,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:50,387 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 18992 transitions. [2021-07-13 19:54:50,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:54:50,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:50,397 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:50,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 19:54:50,597 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:50,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:50,598 INFO L82 PathProgramCache]: Analyzing trace with hash -750260253, now seen corresponding path program 39 times [2021-07-13 19:54:50,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:50,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895330381] [2021-07-13 19:54:50,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:50,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:50,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:50,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895330381] [2021-07-13 19:54:50,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895330381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:50,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547789363] [2021-07-13 19:54:50,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:50,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:54:50,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:50,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:54:50,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:50,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547789363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:50,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:50,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-07-13 19:54:50,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101582310] [2021-07-13 19:54:50,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:54:50,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:50,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:54:50,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:54:50,693 INFO L87 Difference]: Start difference. First operand 4408 states and 18992 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:50,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:50,771 INFO L93 Difference]: Finished difference Result 5262 states and 22054 transitions. [2021-07-13 19:54:50,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:54:50,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:54:50,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:50,785 INFO L225 Difference]: With dead ends: 5262 [2021-07-13 19:54:50,785 INFO L226 Difference]: Without dead ends: 5190 [2021-07-13 19:54:50,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:54:50,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2021-07-13 19:54:50,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 4400. [2021-07-13 19:54:50,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4400 states, 4399 states have (on average 4.2798363264378265) internal successors, (18827), 4399 states have internal predecessors, (18827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:50,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4400 states to 4400 states and 18827 transitions. [2021-07-13 19:54:50,861 INFO L78 Accepts]: Start accepts. Automaton has 4400 states and 18827 transitions. Word has length 31 [2021-07-13 19:54:50,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:50,861 INFO L482 AbstractCegarLoop]: Abstraction has 4400 states and 18827 transitions. [2021-07-13 19:54:50,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 4400 states and 18827 transitions. [2021-07-13 19:54:50,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:54:50,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:50,869 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:51,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-07-13 19:54:51,070 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:51,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash 75547345, now seen corresponding path program 40 times [2021-07-13 19:54:51,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:51,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372674227] [2021-07-13 19:54:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:51,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:51,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372674227] [2021-07-13 19:54:51,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372674227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:51,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25404488] [2021-07-13 19:54:51,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:51,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:51,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:51,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:54:51,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:51,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25404488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:51,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:51,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-07-13 19:54:51,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598063937] [2021-07-13 19:54:51,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:54:51,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:51,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:54:51,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:54:51,164 INFO L87 Difference]: Start difference. First operand 4400 states and 18827 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:51,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:51,262 INFO L93 Difference]: Finished difference Result 7147 states and 29601 transitions. [2021-07-13 19:54:51,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:54:51,262 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:54:51,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:51,282 INFO L225 Difference]: With dead ends: 7147 [2021-07-13 19:54:51,282 INFO L226 Difference]: Without dead ends: 6921 [2021-07-13 19:54:51,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:54:51,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6921 states. [2021-07-13 19:54:51,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6921 to 5792. [2021-07-13 19:54:51,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 5791 states have (on average 4.318425142462441) internal successors, (25008), 5791 states have internal predecessors, (25008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:51,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 25008 transitions. [2021-07-13 19:54:51,422 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 25008 transitions. Word has length 31 [2021-07-13 19:54:51,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:51,422 INFO L482 AbstractCegarLoop]: Abstraction has 5792 states and 25008 transitions. [2021-07-13 19:54:51,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:51,422 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 25008 transitions. [2021-07-13 19:54:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:54:51,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:51,433 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:51,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:51,648 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:51,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:51,648 INFO L82 PathProgramCache]: Analyzing trace with hash -205490181, now seen corresponding path program 41 times [2021-07-13 19:54:51,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:51,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294301877] [2021-07-13 19:54:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:51,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:51,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294301877] [2021-07-13 19:54:51,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294301877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:51,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953060778] [2021-07-13 19:54:51,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:51,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:54:51,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:51,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:54:51,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:51,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953060778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:51,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:51,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-07-13 19:54:51,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606492450] [2021-07-13 19:54:51,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:54:51,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:51,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:54:51,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:54:51,738 INFO L87 Difference]: Start difference. First operand 5792 states and 25008 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:51,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:51,826 INFO L93 Difference]: Finished difference Result 7511 states and 31291 transitions. [2021-07-13 19:54:51,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:54:51,826 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:54:51,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:51,847 INFO L225 Difference]: With dead ends: 7511 [2021-07-13 19:54:51,847 INFO L226 Difference]: Without dead ends: 7409 [2021-07-13 19:54:51,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:54:51,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7409 states. [2021-07-13 19:54:51,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7409 to 5656. [2021-07-13 19:54:51,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5656 states, 5655 states have (on average 4.315296198054819) internal successors, (24403), 5655 states have internal predecessors, (24403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:51,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5656 states to 5656 states and 24403 transitions. [2021-07-13 19:54:51,965 INFO L78 Accepts]: Start accepts. Automaton has 5656 states and 24403 transitions. Word has length 31 [2021-07-13 19:54:51,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:51,965 INFO L482 AbstractCegarLoop]: Abstraction has 5656 states and 24403 transitions. [2021-07-13 19:54:51,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:51,965 INFO L276 IsEmpty]: Start isEmpty. Operand 5656 states and 24403 transitions. [2021-07-13 19:54:51,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:54:51,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:51,975 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:52,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-13 19:54:52,176 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:52,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:52,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1507309107, now seen corresponding path program 42 times [2021-07-13 19:54:52,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:52,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227616215] [2021-07-13 19:54:52,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:52,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:52,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227616215] [2021-07-13 19:54:52,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227616215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:52,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114369943] [2021-07-13 19:54:52,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:52,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:54:52,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:52,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:54:52,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:52,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114369943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:52,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:52,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:54:52,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360007873] [2021-07-13 19:54:52,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:54:52,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:52,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:54:52,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:54:52,276 INFO L87 Difference]: Start difference. First operand 5656 states and 24403 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:52,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:52,377 INFO L93 Difference]: Finished difference Result 7291 states and 30390 transitions. [2021-07-13 19:54:52,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:54:52,377 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:54:52,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:52,403 INFO L225 Difference]: With dead ends: 7291 [2021-07-13 19:54:52,404 INFO L226 Difference]: Without dead ends: 7213 [2021-07-13 19:54:52,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:54:52,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7213 states. [2021-07-13 19:54:52,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7213 to 6069. [2021-07-13 19:54:52,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6069 states, 6068 states have (on average 4.318226763348714) internal successors, (26203), 6068 states have internal predecessors, (26203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6069 states to 6069 states and 26203 transitions. [2021-07-13 19:54:52,562 INFO L78 Accepts]: Start accepts. Automaton has 6069 states and 26203 transitions. Word has length 31 [2021-07-13 19:54:52,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:52,562 INFO L482 AbstractCegarLoop]: Abstraction has 6069 states and 26203 transitions. [2021-07-13 19:54:52,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 6069 states and 26203 transitions. [2021-07-13 19:54:52,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:54:52,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:52,573 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:52,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:52,773 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:52,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:52,774 INFO L82 PathProgramCache]: Analyzing trace with hash 562379733, now seen corresponding path program 43 times [2021-07-13 19:54:52,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:52,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109390736] [2021-07-13 19:54:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:52,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:52,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109390736] [2021-07-13 19:54:52,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109390736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:52,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947131385] [2021-07-13 19:54:52,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:52,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:54:52,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:52,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947131385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:52,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:52,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 19:54:52,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849161354] [2021-07-13 19:54:52,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:54:52,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:52,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:54:52,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:54:52,870 INFO L87 Difference]: Start difference. First operand 6069 states and 26203 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:52,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:52,994 INFO L93 Difference]: Finished difference Result 8199 states and 34127 transitions. [2021-07-13 19:54:52,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:54:52,995 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:54:52,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:53,019 INFO L225 Difference]: With dead ends: 8199 [2021-07-13 19:54:53,019 INFO L226 Difference]: Without dead ends: 7998 [2021-07-13 19:54:53,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:54:53,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7998 states. [2021-07-13 19:54:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7998 to 5836. [2021-07-13 19:54:53,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5836 states, 5835 states have (on average 4.310025706940874) internal successors, (25149), 5835 states have internal predecessors, (25149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5836 states to 5836 states and 25149 transitions. [2021-07-13 19:54:53,154 INFO L78 Accepts]: Start accepts. Automaton has 5836 states and 25149 transitions. Word has length 31 [2021-07-13 19:54:53,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:53,154 INFO L482 AbstractCegarLoop]: Abstraction has 5836 states and 25149 transitions. [2021-07-13 19:54:53,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:53,154 INFO L276 IsEmpty]: Start isEmpty. Operand 5836 states and 25149 transitions. [2021-07-13 19:54:53,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:54:53,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:53,167 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:53,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:53,367 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:53,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:53,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1890243778, now seen corresponding path program 44 times [2021-07-13 19:54:53,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:53,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977513529] [2021-07-13 19:54:53,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:53,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:53,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977513529] [2021-07-13 19:54:53,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977513529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:53,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871688840] [2021-07-13 19:54:53,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:53,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:53,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:53,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:54:53,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:53,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:53,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 19:54:53,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:53,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:53,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:53,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-07-13 19:54:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:53,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871688840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:53,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:53,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:54:53,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62769610] [2021-07-13 19:54:53,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:54:53,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:53,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:54:53,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:54:53,976 INFO L87 Difference]: Start difference. First operand 5836 states and 25149 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:55,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:55,004 INFO L93 Difference]: Finished difference Result 6478 states and 27684 transitions. [2021-07-13 19:54:55,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:54:55,004 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:54:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:55,022 INFO L225 Difference]: With dead ends: 6478 [2021-07-13 19:54:55,023 INFO L226 Difference]: Without dead ends: 6459 [2021-07-13 19:54:55,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 896.9ms TimeCoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:54:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6459 states. [2021-07-13 19:54:55,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6459 to 5939. [2021-07-13 19:54:55,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 5938 states have (on average 4.303974402155608) internal successors, (25557), 5938 states have internal predecessors, (25557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:55,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 25557 transitions. [2021-07-13 19:54:55,156 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 25557 transitions. Word has length 33 [2021-07-13 19:54:55,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:55,156 INFO L482 AbstractCegarLoop]: Abstraction has 5939 states and 25557 transitions. [2021-07-13 19:54:55,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:55,156 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 25557 transitions. [2021-07-13 19:54:55,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:54:55,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:55,167 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:55,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-07-13 19:54:55,381 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:55,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:55,381 INFO L82 PathProgramCache]: Analyzing trace with hash 185907592, now seen corresponding path program 45 times [2021-07-13 19:54:55,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:55,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747952980] [2021-07-13 19:54:55,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:55,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:55,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747952980] [2021-07-13 19:54:55,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747952980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:55,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44756229] [2021-07-13 19:54:55,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:55,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:54:55,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:55,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:54:55,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:55,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:55,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 19:54:55,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:55,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:55,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:55,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-07-13 19:54:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:55,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44756229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:55,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:55,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:54:55,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813414512] [2021-07-13 19:54:55,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:54:55,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:55,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:54:55,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:54:55,940 INFO L87 Difference]: Start difference. First operand 5939 states and 25557 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:57,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:57,060 INFO L93 Difference]: Finished difference Result 6497 states and 27746 transitions. [2021-07-13 19:54:57,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:54:57,061 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:54:57,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:57,080 INFO L225 Difference]: With dead ends: 6497 [2021-07-13 19:54:57,080 INFO L226 Difference]: Without dead ends: 6478 [2021-07-13 19:54:57,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 991.5ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:54:57,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6478 states. [2021-07-13 19:54:57,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6478 to 5942. [2021-07-13 19:54:57,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5942 states, 5941 states have (on average 4.303484261908769) internal successors, (25567), 5941 states have internal predecessors, (25567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5942 states to 5942 states and 25567 transitions. [2021-07-13 19:54:57,198 INFO L78 Accepts]: Start accepts. Automaton has 5942 states and 25567 transitions. Word has length 33 [2021-07-13 19:54:57,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:57,198 INFO L482 AbstractCegarLoop]: Abstraction has 5942 states and 25567 transitions. [2021-07-13 19:54:57,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:57,198 INFO L276 IsEmpty]: Start isEmpty. Operand 5942 states and 25567 transitions. [2021-07-13 19:54:57,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:54:57,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:57,209 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:57,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-13 19:54:57,410 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:57,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:57,410 INFO L82 PathProgramCache]: Analyzing trace with hash -265337576, now seen corresponding path program 46 times [2021-07-13 19:54:57,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:57,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763069928] [2021-07-13 19:54:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:57,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:57,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763069928] [2021-07-13 19:54:57,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763069928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:57,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454643850] [2021-07-13 19:54:57,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:57,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:57,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:57,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:54:57,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:57,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:54:57,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:57,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:57,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:57,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 19:54:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:57,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454643850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:57,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:57,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:54:57,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120998029] [2021-07-13 19:54:57,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:54:57,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:57,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:54:57,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:54:57,855 INFO L87 Difference]: Start difference. First operand 5942 states and 25567 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:59,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:59,093 INFO L93 Difference]: Finished difference Result 6457 states and 27475 transitions. [2021-07-13 19:54:59,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:54:59,093 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:54:59,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:59,110 INFO L225 Difference]: With dead ends: 6457 [2021-07-13 19:54:59,111 INFO L226 Difference]: Without dead ends: 6438 [2021-07-13 19:54:59,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 896.9ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:54:59,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6438 states. [2021-07-13 19:54:59,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6438 to 5990. [2021-07-13 19:54:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5990 states, 5989 states have (on average 4.307062948739356) internal successors, (25795), 5989 states have internal predecessors, (25795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:59,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5990 states to 5990 states and 25795 transitions. [2021-07-13 19:54:59,213 INFO L78 Accepts]: Start accepts. Automaton has 5990 states and 25795 transitions. Word has length 33 [2021-07-13 19:54:59,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:59,213 INFO L482 AbstractCegarLoop]: Abstraction has 5990 states and 25795 transitions. [2021-07-13 19:54:59,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:59,214 INFO L276 IsEmpty]: Start isEmpty. Operand 5990 states and 25795 transitions. [2021-07-13 19:54:59,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:54:59,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:59,224 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:59,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-13 19:54:59,424 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:59,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:59,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1848381270, now seen corresponding path program 47 times [2021-07-13 19:54:59,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:59,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138475793] [2021-07-13 19:54:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:59,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:59,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138475793] [2021-07-13 19:54:59,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138475793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:59,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806455129] [2021-07-13 19:54:59,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:59,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:54:59,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:59,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:54:59,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:59,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:59,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 19:54:59,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:59,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:59,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:59,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 19:54:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:59,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806455129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:59,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:59,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:54:59,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650533908] [2021-07-13 19:54:59,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:54:59,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:59,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:54:59,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:54:59,882 INFO L87 Difference]: Start difference. First operand 5990 states and 25795 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:01,312 INFO L93 Difference]: Finished difference Result 6603 states and 28103 transitions. [2021-07-13 19:55:01,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:55:01,313 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:01,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:01,331 INFO L225 Difference]: With dead ends: 6603 [2021-07-13 19:55:01,332 INFO L226 Difference]: Without dead ends: 6584 [2021-07-13 19:55:01,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1048.9ms TimeCoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:55:01,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6584 states. [2021-07-13 19:55:01,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6584 to 6014. [2021-07-13 19:55:01,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6014 states, 6013 states have (on average 4.308165641110926) internal successors, (25905), 6013 states have internal predecessors, (25905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6014 states to 6014 states and 25905 transitions. [2021-07-13 19:55:01,443 INFO L78 Accepts]: Start accepts. Automaton has 6014 states and 25905 transitions. Word has length 33 [2021-07-13 19:55:01,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:01,443 INFO L482 AbstractCegarLoop]: Abstraction has 6014 states and 25905 transitions. [2021-07-13 19:55:01,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:01,444 INFO L276 IsEmpty]: Start isEmpty. Operand 6014 states and 25905 transitions. [2021-07-13 19:55:01,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:01,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:01,455 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:01,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-13 19:55:01,655 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:01,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:01,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1882988602, now seen corresponding path program 48 times [2021-07-13 19:55:01,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:01,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316549006] [2021-07-13 19:55:01,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:01,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:01,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316549006] [2021-07-13 19:55:01,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316549006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:01,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29694757] [2021-07-13 19:55:01,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:01,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:55:01,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:01,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:55:01,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:02,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:02,116 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:55:02,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-07-13 19:55:02,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:55:02,150 INFO L628 ElimStorePlain]: treesize reduction 74, result has 22.9 percent of original size [2021-07-13 19:55:02,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:02,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-13 19:55:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:02,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29694757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:02,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:02,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:55:02,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65437636] [2021-07-13 19:55:02,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:55:02,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:02,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:55:02,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:55:02,273 INFO L87 Difference]: Start difference. First operand 6014 states and 25905 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:03,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:03,691 INFO L93 Difference]: Finished difference Result 6445 states and 27477 transitions. [2021-07-13 19:55:03,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:55:03,691 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:03,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:03,709 INFO L225 Difference]: With dead ends: 6445 [2021-07-13 19:55:03,710 INFO L226 Difference]: Without dead ends: 6426 [2021-07-13 19:55:03,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1231.8ms TimeCoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:55:03,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6426 states. [2021-07-13 19:55:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6426 to 6024. [2021-07-13 19:55:03,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6024 states, 6023 states have (on average 4.307155902374232) internal successors, (25942), 6023 states have internal predecessors, (25942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:03,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 25942 transitions. [2021-07-13 19:55:03,854 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 25942 transitions. Word has length 33 [2021-07-13 19:55:03,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:03,855 INFO L482 AbstractCegarLoop]: Abstraction has 6024 states and 25942 transitions. [2021-07-13 19:55:03,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:03,855 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 25942 transitions. [2021-07-13 19:55:03,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:03,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:03,866 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:04,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:04,067 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:04,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:04,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1511763596, now seen corresponding path program 49 times [2021-07-13 19:55:04,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:04,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492969375] [2021-07-13 19:55:04,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:04,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:04,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492969375] [2021-07-13 19:55:04,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492969375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:04,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856201509] [2021-07-13 19:55:04,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:04,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:55:04,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:04,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:55:04,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:04,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:04,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:04,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-13 19:55:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:04,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856201509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:04,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:04,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:55:04,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053696374] [2021-07-13 19:55:04,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:55:04,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:04,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:55:04,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:55:04,515 INFO L87 Difference]: Start difference. First operand 6024 states and 25942 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:05,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:05,486 INFO L93 Difference]: Finished difference Result 6948 states and 29535 transitions. [2021-07-13 19:55:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:55:05,491 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:05,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:05,552 INFO L225 Difference]: With dead ends: 6948 [2021-07-13 19:55:05,552 INFO L226 Difference]: Without dead ends: 6933 [2021-07-13 19:55:05,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 702.7ms TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:55:05,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6933 states. [2021-07-13 19:55:05,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6933 to 6087. [2021-07-13 19:55:05,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6087 states, 6086 states have (on average 4.306112389089714) internal successors, (26207), 6086 states have internal predecessors, (26207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6087 states to 6087 states and 26207 transitions. [2021-07-13 19:55:05,708 INFO L78 Accepts]: Start accepts. Automaton has 6087 states and 26207 transitions. Word has length 33 [2021-07-13 19:55:05,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:05,708 INFO L482 AbstractCegarLoop]: Abstraction has 6087 states and 26207 transitions. [2021-07-13 19:55:05,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 6087 states and 26207 transitions. [2021-07-13 19:55:05,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:05,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:05,721 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:05,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:05,921 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:05,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:05,922 INFO L82 PathProgramCache]: Analyzing trace with hash -156629846, now seen corresponding path program 50 times [2021-07-13 19:55:05,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:05,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356800958] [2021-07-13 19:55:05,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:06,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:06,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356800958] [2021-07-13 19:55:06,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356800958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:06,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118379710] [2021-07-13 19:55:06,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:06,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:06,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:06,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:55:06,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:06,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:06,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 19:55:06,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:06,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:06,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:06,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-13 19:55:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:06,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118379710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:06,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:06,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:55:06,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656991859] [2021-07-13 19:55:06,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:55:06,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:06,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:55:06,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:55:06,481 INFO L87 Difference]: Start difference. First operand 6087 states and 26207 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:07,458 INFO L93 Difference]: Finished difference Result 6483 states and 27696 transitions. [2021-07-13 19:55:07,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:55:07,458 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:07,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:07,479 INFO L225 Difference]: With dead ends: 6483 [2021-07-13 19:55:07,479 INFO L226 Difference]: Without dead ends: 6469 [2021-07-13 19:55:07,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 879.7ms TimeCoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:55:07,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6469 states. [2021-07-13 19:55:07,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6469 to 6073. [2021-07-13 19:55:07,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6073 states, 6072 states have (on average 4.308959156785244) internal successors, (26164), 6072 states have internal predecessors, (26164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:07,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6073 states to 6073 states and 26164 transitions. [2021-07-13 19:55:07,643 INFO L78 Accepts]: Start accepts. Automaton has 6073 states and 26164 transitions. Word has length 33 [2021-07-13 19:55:07,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:07,643 INFO L482 AbstractCegarLoop]: Abstraction has 6073 states and 26164 transitions. [2021-07-13 19:55:07,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:07,644 INFO L276 IsEmpty]: Start isEmpty. Operand 6073 states and 26164 transitions. [2021-07-13 19:55:07,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:07,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:07,655 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:07,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:07,857 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:07,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:07,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1226663166, now seen corresponding path program 51 times [2021-07-13 19:55:07,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:07,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612270647] [2021-07-13 19:55:07,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:08,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:08,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612270647] [2021-07-13 19:55:08,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612270647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:08,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380270238] [2021-07-13 19:55:08,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:08,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:55:08,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:08,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:55:08,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:08,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:08,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 19:55:08,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:08,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:08,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:08,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-07-13 19:55:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:08,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380270238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:08,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:08,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:55:08,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994415416] [2021-07-13 19:55:08,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:55:08,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:08,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:55:08,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:55:08,446 INFO L87 Difference]: Start difference. First operand 6073 states and 26164 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:09,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:09,707 INFO L93 Difference]: Finished difference Result 6646 states and 28417 transitions. [2021-07-13 19:55:09,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:55:09,707 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:09,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:09,727 INFO L225 Difference]: With dead ends: 6646 [2021-07-13 19:55:09,727 INFO L226 Difference]: Without dead ends: 6627 [2021-07-13 19:55:09,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1022.6ms TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:55:09,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6627 states. [2021-07-13 19:55:09,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6627 to 6073. [2021-07-13 19:55:09,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6073 states, 6072 states have (on average 4.308959156785244) internal successors, (26164), 6072 states have internal predecessors, (26164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6073 states to 6073 states and 26164 transitions. [2021-07-13 19:55:09,876 INFO L78 Accepts]: Start accepts. Automaton has 6073 states and 26164 transitions. Word has length 33 [2021-07-13 19:55:09,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:09,876 INFO L482 AbstractCegarLoop]: Abstraction has 6073 states and 26164 transitions. [2021-07-13 19:55:09,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 6073 states and 26164 transitions. [2021-07-13 19:55:09,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:09,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:09,887 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:10,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-13 19:55:10,097 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:10,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:10,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1371223120, now seen corresponding path program 52 times [2021-07-13 19:55:10,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:10,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974454185] [2021-07-13 19:55:10,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:10,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:10,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974454185] [2021-07-13 19:55:10,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974454185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:10,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770206755] [2021-07-13 19:55:10,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:10,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:55:10,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:10,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:55:10,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:10,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:55:10,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:10,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:10,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:10,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-13 19:55:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:10,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770206755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:10,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:10,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:55:10,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126850905] [2021-07-13 19:55:10,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:55:10,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:10,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:55:10,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:55:10,530 INFO L87 Difference]: Start difference. First operand 6073 states and 26164 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:11,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:11,730 INFO L93 Difference]: Finished difference Result 7065 states and 30042 transitions. [2021-07-13 19:55:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:55:11,730 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:11,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:11,750 INFO L225 Difference]: With dead ends: 7065 [2021-07-13 19:55:11,751 INFO L226 Difference]: Without dead ends: 7030 [2021-07-13 19:55:11,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 863.1ms TimeCoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:55:11,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7030 states. [2021-07-13 19:55:11,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7030 to 6011. [2021-07-13 19:55:11,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6011 states, 6010 states have (on average 4.31297836938436) internal successors, (25921), 6010 states have internal predecessors, (25921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:11,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6011 states to 6011 states and 25921 transitions. [2021-07-13 19:55:11,907 INFO L78 Accepts]: Start accepts. Automaton has 6011 states and 25921 transitions. Word has length 33 [2021-07-13 19:55:11,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:11,907 INFO L482 AbstractCegarLoop]: Abstraction has 6011 states and 25921 transitions. [2021-07-13 19:55:11,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:11,907 INFO L276 IsEmpty]: Start isEmpty. Operand 6011 states and 25921 transitions. [2021-07-13 19:55:11,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:11,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:11,919 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:12,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-13 19:55:12,120 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:12,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:12,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1124446190, now seen corresponding path program 53 times [2021-07-13 19:55:12,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:12,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295057340] [2021-07-13 19:55:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:12,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:12,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295057340] [2021-07-13 19:55:12,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295057340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:12,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905263492] [2021-07-13 19:55:12,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:12,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:55:12,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:12,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:55:12,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:12,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:12,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 19:55:12,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:12,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:12,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:12,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 19:55:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:12,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905263492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:12,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:12,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:55:12,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004525351] [2021-07-13 19:55:12,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:55:12,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:12,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:55:12,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:55:12,570 INFO L87 Difference]: Start difference. First operand 6011 states and 25921 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:13,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:13,827 INFO L93 Difference]: Finished difference Result 7566 states and 32115 transitions. [2021-07-13 19:55:13,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:55:13,827 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:13,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:13,850 INFO L225 Difference]: With dead ends: 7566 [2021-07-13 19:55:13,850 INFO L226 Difference]: Without dead ends: 7516 [2021-07-13 19:55:13,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1028.6ms TimeCoverageRelationStatistics Valid=319, Invalid=1751, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:55:13,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2021-07-13 19:55:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 6306. [2021-07-13 19:55:14,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6306 states, 6305 states have (on average 4.32244250594766) internal successors, (27253), 6305 states have internal predecessors, (27253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6306 states to 6306 states and 27253 transitions. [2021-07-13 19:55:14,055 INFO L78 Accepts]: Start accepts. Automaton has 6306 states and 27253 transitions. Word has length 33 [2021-07-13 19:55:14,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:14,056 INFO L482 AbstractCegarLoop]: Abstraction has 6306 states and 27253 transitions. [2021-07-13 19:55:14,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:14,056 INFO L276 IsEmpty]: Start isEmpty. Operand 6306 states and 27253 transitions. [2021-07-13 19:55:14,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:14,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:14,070 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:14,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-13 19:55:14,271 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:14,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:14,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1867248500, now seen corresponding path program 54 times [2021-07-13 19:55:14,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:14,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987893608] [2021-07-13 19:55:14,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:14,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:14,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987893608] [2021-07-13 19:55:14,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987893608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:14,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177823381] [2021-07-13 19:55:14,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:14,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:55:14,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:14,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 19:55:14,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:14,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:14,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:14,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:14,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:14,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2021-07-13 19:55:14,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:14,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:14,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:14,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-07-13 19:55:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:14,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177823381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:14,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:14,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:55:14,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009012961] [2021-07-13 19:55:14,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:55:14,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:14,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:55:14,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:55:14,815 INFO L87 Difference]: Start difference. First operand 6306 states and 27253 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:16,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:16,242 INFO L93 Difference]: Finished difference Result 7086 states and 30206 transitions. [2021-07-13 19:55:16,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:55:16,242 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:16,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:16,263 INFO L225 Difference]: With dead ends: 7086 [2021-07-13 19:55:16,263 INFO L226 Difference]: Without dead ends: 7073 [2021-07-13 19:55:16,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1163.9ms TimeCoverageRelationStatistics Valid=358, Invalid=2092, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:55:16,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7073 states. [2021-07-13 19:55:16,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7073 to 6315. [2021-07-13 19:55:16,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6315 states, 6314 states have (on average 4.31913208742477) internal successors, (27271), 6314 states have internal predecessors, (27271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6315 states to 6315 states and 27271 transitions. [2021-07-13 19:55:16,433 INFO L78 Accepts]: Start accepts. Automaton has 6315 states and 27271 transitions. Word has length 33 [2021-07-13 19:55:16,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:16,433 INFO L482 AbstractCegarLoop]: Abstraction has 6315 states and 27271 transitions. [2021-07-13 19:55:16,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:16,434 INFO L276 IsEmpty]: Start isEmpty. Operand 6315 states and 27271 transitions. [2021-07-13 19:55:16,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:16,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:16,446 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:16,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-07-13 19:55:16,647 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:16,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:16,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1528356724, now seen corresponding path program 55 times [2021-07-13 19:55:16,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:16,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126177141] [2021-07-13 19:55:16,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:16,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:16,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126177141] [2021-07-13 19:55:16,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126177141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:16,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506129105] [2021-07-13 19:55:16,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:16,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:55:16,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:17,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:17,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 19:55:17,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:17,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:17,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:17,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 19:55:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:17,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506129105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:17,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:17,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:55:17,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956549498] [2021-07-13 19:55:17,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:55:17,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:17,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:55:17,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:55:17,146 INFO L87 Difference]: Start difference. First operand 6315 states and 27271 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:19,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:19,529 INFO L93 Difference]: Finished difference Result 7847 states and 33031 transitions. [2021-07-13 19:55:19,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 19:55:19,529 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:19,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:19,551 INFO L225 Difference]: With dead ends: 7847 [2021-07-13 19:55:19,552 INFO L226 Difference]: Without dead ends: 7796 [2021-07-13 19:55:19,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 1813.1ms TimeCoverageRelationStatistics Valid=463, Invalid=2959, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:55:19,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7796 states. [2021-07-13 19:55:19,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7796 to 6274. [2021-07-13 19:55:19,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6274 states, 6273 states have (on average 4.320102024549657) internal successors, (27100), 6273 states have internal predecessors, (27100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:19,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6274 states to 6274 states and 27100 transitions. [2021-07-13 19:55:19,688 INFO L78 Accepts]: Start accepts. Automaton has 6274 states and 27100 transitions. Word has length 33 [2021-07-13 19:55:19,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:19,688 INFO L482 AbstractCegarLoop]: Abstraction has 6274 states and 27100 transitions. [2021-07-13 19:55:19,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:19,688 INFO L276 IsEmpty]: Start isEmpty. Operand 6274 states and 27100 transitions. [2021-07-13 19:55:19,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:19,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:19,702 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:19,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-13 19:55:19,902 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:19,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:19,903 INFO L82 PathProgramCache]: Analyzing trace with hash 142194076, now seen corresponding path program 56 times [2021-07-13 19:55:19,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:19,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517393865] [2021-07-13 19:55:19,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:20,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:20,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517393865] [2021-07-13 19:55:20,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517393865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:20,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886493046] [2021-07-13 19:55:20,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:20,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:20,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:20,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 19:55:20,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:20,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:20,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:55:20,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:20,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:20,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:20,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-13 19:55:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:20,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886493046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:20,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:20,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 19:55:20,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485545260] [2021-07-13 19:55:20,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:55:20,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:20,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:55:20,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:55:20,450 INFO L87 Difference]: Start difference. First operand 6274 states and 27100 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:23,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:23,156 INFO L93 Difference]: Finished difference Result 7830 states and 32405 transitions. [2021-07-13 19:55:23,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 19:55:23,157 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:23,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:23,180 INFO L225 Difference]: With dead ends: 7830 [2021-07-13 19:55:23,181 INFO L226 Difference]: Without dead ends: 7800 [2021-07-13 19:55:23,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 2215.9ms TimeCoverageRelationStatistics Valid=379, Invalid=3043, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:55:23,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2021-07-13 19:55:23,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 6304. [2021-07-13 19:55:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6304 states, 6303 states have (on average 4.32206885610027) internal successors, (27242), 6303 states have internal predecessors, (27242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:23,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6304 states to 6304 states and 27242 transitions. [2021-07-13 19:55:23,323 INFO L78 Accepts]: Start accepts. Automaton has 6304 states and 27242 transitions. Word has length 33 [2021-07-13 19:55:23,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:23,323 INFO L482 AbstractCegarLoop]: Abstraction has 6304 states and 27242 transitions. [2021-07-13 19:55:23,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:23,324 INFO L276 IsEmpty]: Start isEmpty. Operand 6304 states and 27242 transitions. [2021-07-13 19:55:23,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:23,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:23,337 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:23,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:23,537 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:23,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:23,538 INFO L82 PathProgramCache]: Analyzing trace with hash -906578326, now seen corresponding path program 57 times [2021-07-13 19:55:23,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:23,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383496608] [2021-07-13 19:55:23,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:23,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:23,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383496608] [2021-07-13 19:55:23,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383496608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:23,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388704893] [2021-07-13 19:55:23,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:23,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:55:23,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:23,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 19:55:23,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:23,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:23,887 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:55:23,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 19:55:23,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:23,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:23,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:23,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-07-13 19:55:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:24,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388704893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:24,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:24,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:55:24,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306049447] [2021-07-13 19:55:24,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:55:24,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:24,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:55:24,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:55:24,098 INFO L87 Difference]: Start difference. First operand 6304 states and 27242 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:24,450 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-07-13 19:55:26,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:26,026 INFO L93 Difference]: Finished difference Result 7675 states and 32393 transitions. [2021-07-13 19:55:26,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:55:26,027 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:26,049 INFO L225 Difference]: With dead ends: 7675 [2021-07-13 19:55:26,049 INFO L226 Difference]: Without dead ends: 7613 [2021-07-13 19:55:26,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1671.2ms TimeCoverageRelationStatistics Valid=402, Invalid=2790, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 19:55:26,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7613 states. [2021-07-13 19:55:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7613 to 6435. [2021-07-13 19:55:26,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6435 states, 6434 states have (on average 4.327012744793286) internal successors, (27840), 6434 states have internal predecessors, (27840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6435 states to 6435 states and 27840 transitions. [2021-07-13 19:55:26,186 INFO L78 Accepts]: Start accepts. Automaton has 6435 states and 27840 transitions. Word has length 33 [2021-07-13 19:55:26,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:26,186 INFO L482 AbstractCegarLoop]: Abstraction has 6435 states and 27840 transitions. [2021-07-13 19:55:26,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:26,186 INFO L276 IsEmpty]: Start isEmpty. Operand 6435 states and 27840 transitions. [2021-07-13 19:55:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:26,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:26,201 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:26,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:26,402 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:26,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:26,402 INFO L82 PathProgramCache]: Analyzing trace with hash 396694280, now seen corresponding path program 58 times [2021-07-13 19:55:26,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:26,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208521467] [2021-07-13 19:55:26,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:26,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:26,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208521467] [2021-07-13 19:55:26,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208521467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:26,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137859820] [2021-07-13 19:55:26,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:26,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:55:26,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:26,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:55:26,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:26,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:55:26,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:26,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:26,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:26,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 19:55:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:26,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137859820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:26,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:26,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:55:26,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90958180] [2021-07-13 19:55:26,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:55:26,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:26,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:55:26,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:55:26,834 INFO L87 Difference]: Start difference. First operand 6435 states and 27840 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:27,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:27,826 INFO L93 Difference]: Finished difference Result 7805 states and 32976 transitions. [2021-07-13 19:55:27,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:55:27,826 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:27,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:27,849 INFO L225 Difference]: With dead ends: 7805 [2021-07-13 19:55:27,849 INFO L226 Difference]: Without dead ends: 7781 [2021-07-13 19:55:27,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 730.5ms TimeCoverageRelationStatistics Valid=267, Invalid=1455, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:55:27,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7781 states. [2021-07-13 19:55:27,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7781 to 6489. [2021-07-13 19:55:27,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6489 states, 6488 states have (on average 4.331072749691739) internal successors, (28100), 6488 states have internal predecessors, (28100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:27,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6489 states to 6489 states and 28100 transitions. [2021-07-13 19:55:27,988 INFO L78 Accepts]: Start accepts. Automaton has 6489 states and 28100 transitions. Word has length 33 [2021-07-13 19:55:27,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:27,988 INFO L482 AbstractCegarLoop]: Abstraction has 6489 states and 28100 transitions. [2021-07-13 19:55:27,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:27,988 INFO L276 IsEmpty]: Start isEmpty. Operand 6489 states and 28100 transitions. [2021-07-13 19:55:28,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:28,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:28,004 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:28,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-13 19:55:28,204 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:28,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:28,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1271699162, now seen corresponding path program 59 times [2021-07-13 19:55:28,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:28,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527302702] [2021-07-13 19:55:28,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:28,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:28,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527302702] [2021-07-13 19:55:28,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527302702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:28,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246987320] [2021-07-13 19:55:28,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:28,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:55:28,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:28,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:55:28,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:28,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:28,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 19:55:28,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:28,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:28,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:28,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 19:55:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:28,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246987320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:28,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:28,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:55:28,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702396679] [2021-07-13 19:55:28,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:55:28,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:28,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:55:28,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:55:28,602 INFO L87 Difference]: Start difference. First operand 6489 states and 28100 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:29,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:29,444 INFO L93 Difference]: Finished difference Result 7827 states and 33033 transitions. [2021-07-13 19:55:29,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:55:29,445 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:29,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:29,467 INFO L225 Difference]: With dead ends: 7827 [2021-07-13 19:55:29,467 INFO L226 Difference]: Without dead ends: 7771 [2021-07-13 19:55:29,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 705.0ms TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:55:29,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7771 states. [2021-07-13 19:55:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7771 to 6483. [2021-07-13 19:55:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6483 states, 6482 states have (on average 4.333076211045974) internal successors, (28087), 6482 states have internal predecessors, (28087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:29,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6483 states to 6483 states and 28087 transitions. [2021-07-13 19:55:29,602 INFO L78 Accepts]: Start accepts. Automaton has 6483 states and 28087 transitions. Word has length 33 [2021-07-13 19:55:29,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:29,602 INFO L482 AbstractCegarLoop]: Abstraction has 6483 states and 28087 transitions. [2021-07-13 19:55:29,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:29,602 INFO L276 IsEmpty]: Start isEmpty. Operand 6483 states and 28087 transitions. [2021-07-13 19:55:29,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:29,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:29,615 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:29,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-13 19:55:29,815 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:29,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:29,816 INFO L82 PathProgramCache]: Analyzing trace with hash -387346006, now seen corresponding path program 60 times [2021-07-13 19:55:29,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:29,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708525288] [2021-07-13 19:55:29,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:29,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:29,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708525288] [2021-07-13 19:55:29,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708525288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:29,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375640207] [2021-07-13 19:55:29,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:30,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:55:30,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:30,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 19:55:30,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:30,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:30,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:55:30,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:30,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:30,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:30,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-13 19:55:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:30,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375640207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:30,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:30,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:55:30,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779792483] [2021-07-13 19:55:30,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:55:30,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:30,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:55:30,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:55:30,289 INFO L87 Difference]: Start difference. First operand 6483 states and 28087 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:31,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:31,587 INFO L93 Difference]: Finished difference Result 6950 states and 29841 transitions. [2021-07-13 19:55:31,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:55:31,588 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:31,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:31,608 INFO L225 Difference]: With dead ends: 6950 [2021-07-13 19:55:31,608 INFO L226 Difference]: Without dead ends: 6891 [2021-07-13 19:55:31,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1154.0ms TimeCoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:55:31,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6891 states. [2021-07-13 19:55:31,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6891 to 6471. [2021-07-13 19:55:31,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6471 states, 6470 states have (on average 4.332921174652241) internal successors, (28034), 6470 states have internal predecessors, (28034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:31,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6471 states to 6471 states and 28034 transitions. [2021-07-13 19:55:31,765 INFO L78 Accepts]: Start accepts. Automaton has 6471 states and 28034 transitions. Word has length 33 [2021-07-13 19:55:31,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:31,766 INFO L482 AbstractCegarLoop]: Abstraction has 6471 states and 28034 transitions. [2021-07-13 19:55:31,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:31,766 INFO L276 IsEmpty]: Start isEmpty. Operand 6471 states and 28034 transitions. [2021-07-13 19:55:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:31,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:31,779 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:31,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:31,979 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:31,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:31,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1528202498, now seen corresponding path program 61 times [2021-07-13 19:55:31,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:31,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188529376] [2021-07-13 19:55:31,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:32,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:32,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188529376] [2021-07-13 19:55:32,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188529376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:32,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515892401] [2021-07-13 19:55:32,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:32,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:55:32,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:32,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:32,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 19:55:32,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:32,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:32,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:32,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 19:55:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:32,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515892401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:32,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:32,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:55:32,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458633236] [2021-07-13 19:55:32,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:55:32,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:32,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:55:32,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:55:32,364 INFO L87 Difference]: Start difference. First operand 6471 states and 28034 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:33,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:33,623 INFO L93 Difference]: Finished difference Result 8470 states and 35739 transitions. [2021-07-13 19:55:33,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:55:33,623 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:33,648 INFO L225 Difference]: With dead ends: 8470 [2021-07-13 19:55:33,648 INFO L226 Difference]: Without dead ends: 8420 [2021-07-13 19:55:33,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 980.7ms TimeCoverageRelationStatistics Valid=304, Invalid=1952, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:55:33,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8420 states. [2021-07-13 19:55:33,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8420 to 6765. [2021-07-13 19:55:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6765 states, 6764 states have (on average 4.344766410408043) internal successors, (29388), 6764 states have internal predecessors, (29388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:33,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6765 states to 6765 states and 29388 transitions. [2021-07-13 19:55:33,806 INFO L78 Accepts]: Start accepts. Automaton has 6765 states and 29388 transitions. Word has length 33 [2021-07-13 19:55:33,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:33,806 INFO L482 AbstractCegarLoop]: Abstraction has 6765 states and 29388 transitions. [2021-07-13 19:55:33,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:33,806 INFO L276 IsEmpty]: Start isEmpty. Operand 6765 states and 29388 transitions. [2021-07-13 19:55:33,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:33,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:33,873 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:34,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-13 19:55:34,081 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:34,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:34,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1463492192, now seen corresponding path program 62 times [2021-07-13 19:55:34,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:34,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754865899] [2021-07-13 19:55:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:34,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:34,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754865899] [2021-07-13 19:55:34,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754865899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:34,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128327902] [2021-07-13 19:55:34,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:34,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:34,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:34,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:55:34,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:34,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:34,462 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:55:34,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-07-13 19:55:34,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:55:34,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:34,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:34,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-13 19:55:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:34,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128327902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:34,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:34,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:55:34,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904345944] [2021-07-13 19:55:34,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:55:34,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:34,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:55:34,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:55:34,617 INFO L87 Difference]: Start difference. First operand 6765 states and 29388 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:36,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:36,140 INFO L93 Difference]: Finished difference Result 8081 states and 34208 transitions. [2021-07-13 19:55:36,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:55:36,141 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:36,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:36,163 INFO L225 Difference]: With dead ends: 8081 [2021-07-13 19:55:36,163 INFO L226 Difference]: Without dead ends: 8059 [2021-07-13 19:55:36,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1079.9ms TimeCoverageRelationStatistics Valid=339, Invalid=2417, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:55:36,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8059 states. [2021-07-13 19:55:36,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8059 to 6725. [2021-07-13 19:55:36,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6725 states, 6724 states have (on average 4.343694229625223) internal successors, (29207), 6724 states have internal predecessors, (29207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:36,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6725 states to 6725 states and 29207 transitions. [2021-07-13 19:55:36,362 INFO L78 Accepts]: Start accepts. Automaton has 6725 states and 29207 transitions. Word has length 33 [2021-07-13 19:55:36,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:36,362 INFO L482 AbstractCegarLoop]: Abstraction has 6725 states and 29207 transitions. [2021-07-13 19:55:36,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:36,362 INFO L276 IsEmpty]: Start isEmpty. Operand 6725 states and 29207 transitions. [2021-07-13 19:55:36,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:36,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:36,375 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:36,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:36,576 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:36,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:36,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1932113032, now seen corresponding path program 63 times [2021-07-13 19:55:36,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:36,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031938511] [2021-07-13 19:55:36,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:36,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:36,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031938511] [2021-07-13 19:55:36,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031938511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:36,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135646778] [2021-07-13 19:55:36,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:36,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:55:36,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:36,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:55:36,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:36,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:36,987 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:55:36,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-07-13 19:55:36,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:55:36,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:36,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:36,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-13 19:55:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:37,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135646778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:37,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:37,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:55:37,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322000103] [2021-07-13 19:55:37,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:55:37,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:37,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:55:37,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:55:37,132 INFO L87 Difference]: Start difference. First operand 6725 states and 29207 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:37,870 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-07-13 19:55:40,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:40,139 INFO L93 Difference]: Finished difference Result 8076 states and 34225 transitions. [2021-07-13 19:55:40,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 19:55:40,139 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:40,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:40,162 INFO L225 Difference]: With dead ends: 8076 [2021-07-13 19:55:40,162 INFO L226 Difference]: Without dead ends: 8046 [2021-07-13 19:55:40,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 2387.4ms TimeCoverageRelationStatistics Valid=483, Invalid=4073, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 19:55:40,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8046 states. [2021-07-13 19:55:40,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8046 to 6676. [2021-07-13 19:55:40,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6676 states, 6675 states have (on average 4.3417228464419475) internal successors, (28981), 6675 states have internal predecessors, (28981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:40,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6676 states to 6676 states and 28981 transitions. [2021-07-13 19:55:40,299 INFO L78 Accepts]: Start accepts. Automaton has 6676 states and 28981 transitions. Word has length 33 [2021-07-13 19:55:40,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:40,299 INFO L482 AbstractCegarLoop]: Abstraction has 6676 states and 28981 transitions. [2021-07-13 19:55:40,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:40,299 INFO L276 IsEmpty]: Start isEmpty. Operand 6676 states and 28981 transitions. [2021-07-13 19:55:40,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:40,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:40,312 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:40,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-07-13 19:55:40,512 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:40,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:40,513 INFO L82 PathProgramCache]: Analyzing trace with hash 151514730, now seen corresponding path program 64 times [2021-07-13 19:55:40,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:40,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922254802] [2021-07-13 19:55:40,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:40,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:40,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922254802] [2021-07-13 19:55:40,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922254802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:40,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972136787] [2021-07-13 19:55:40,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:40,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:55:40,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:40,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:55:40,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:40,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:40,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 19:55:40,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:40,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:40,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:40,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 19:55:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:40,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972136787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:40,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:40,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:55:40,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080308121] [2021-07-13 19:55:40,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:55:40,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:40,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:55:40,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:55:40,955 INFO L87 Difference]: Start difference. First operand 6676 states and 28981 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:42,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:42,842 INFO L93 Difference]: Finished difference Result 8754 states and 36818 transitions. [2021-07-13 19:55:42,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 19:55:42,842 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:42,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:42,867 INFO L225 Difference]: With dead ends: 8754 [2021-07-13 19:55:42,867 INFO L226 Difference]: Without dead ends: 8710 [2021-07-13 19:55:42,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1336.4ms TimeCoverageRelationStatistics Valid=408, Invalid=2672, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:55:42,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8710 states. [2021-07-13 19:55:42,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8710 to 6742. [2021-07-13 19:55:42,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6742 states, 6741 states have (on average 4.34816792760718) internal successors, (29311), 6741 states have internal predecessors, (29311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:43,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6742 states to 6742 states and 29311 transitions. [2021-07-13 19:55:43,021 INFO L78 Accepts]: Start accepts. Automaton has 6742 states and 29311 transitions. Word has length 33 [2021-07-13 19:55:43,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:43,021 INFO L482 AbstractCegarLoop]: Abstraction has 6742 states and 29311 transitions. [2021-07-13 19:55:43,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:43,021 INFO L276 IsEmpty]: Start isEmpty. Operand 6742 states and 29311 transitions. [2021-07-13 19:55:43,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:43,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:43,036 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:43,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-13 19:55:43,236 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:43,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:43,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2047434818, now seen corresponding path program 65 times [2021-07-13 19:55:43,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:43,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294010873] [2021-07-13 19:55:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:43,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:43,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294010873] [2021-07-13 19:55:43,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294010873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:43,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8613248] [2021-07-13 19:55:43,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:43,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:55:43,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:43,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:55:43,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:43,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:55:43,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:43,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:43,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:43,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-13 19:55:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:43,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8613248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:43,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:43,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:55:43,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571671446] [2021-07-13 19:55:43,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:55:43,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:43,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:55:43,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:55:43,659 INFO L87 Difference]: Start difference. First operand 6742 states and 29311 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:44,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:44,885 INFO L93 Difference]: Finished difference Result 7478 states and 32071 transitions. [2021-07-13 19:55:44,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:55:44,886 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:44,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:44,908 INFO L225 Difference]: With dead ends: 7478 [2021-07-13 19:55:44,908 INFO L226 Difference]: Without dead ends: 7429 [2021-07-13 19:55:44,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 892.8ms TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:55:44,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7429 states. [2021-07-13 19:55:45,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7429 to 6727. [2021-07-13 19:55:45,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6727 states, 6726 states have (on average 4.349093071662207) internal successors, (29252), 6726 states have internal predecessors, (29252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:45,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6727 states to 6727 states and 29252 transitions. [2021-07-13 19:55:45,038 INFO L78 Accepts]: Start accepts. Automaton has 6727 states and 29252 transitions. Word has length 33 [2021-07-13 19:55:45,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:45,038 INFO L482 AbstractCegarLoop]: Abstraction has 6727 states and 29252 transitions. [2021-07-13 19:55:45,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:45,038 INFO L276 IsEmpty]: Start isEmpty. Operand 6727 states and 29252 transitions. [2021-07-13 19:55:45,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:45,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:45,052 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:45,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-13 19:55:45,252 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:45,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1803518248, now seen corresponding path program 66 times [2021-07-13 19:55:45,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:45,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937621056] [2021-07-13 19:55:45,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:45,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:45,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937621056] [2021-07-13 19:55:45,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937621056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:45,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757738835] [2021-07-13 19:55:45,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:45,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:55:45,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:45,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 19:55:45,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:45,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:45,715 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:55:45,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 19:55:45,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:55:45,734 INFO L628 ElimStorePlain]: treesize reduction 42, result has 32.3 percent of original size [2021-07-13 19:55:45,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:45,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:20 [2021-07-13 19:55:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:45,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757738835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:45,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:45,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:55:45,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905809859] [2021-07-13 19:55:45,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:55:45,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:45,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:55:45,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:55:45,819 INFO L87 Difference]: Start difference. First operand 6727 states and 29252 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:47,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:47,338 INFO L93 Difference]: Finished difference Result 7339 states and 31508 transitions. [2021-07-13 19:55:47,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:55:47,339 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:47,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:47,360 INFO L225 Difference]: With dead ends: 7339 [2021-07-13 19:55:47,360 INFO L226 Difference]: Without dead ends: 7274 [2021-07-13 19:55:47,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1183.9ms TimeCoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:55:47,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7274 states. [2021-07-13 19:55:47,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7274 to 6718. [2021-07-13 19:55:47,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6718 states, 6717 states have (on average 4.3476254280184605) internal successors, (29203), 6717 states have internal predecessors, (29203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:47,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6718 states to 6718 states and 29203 transitions. [2021-07-13 19:55:47,488 INFO L78 Accepts]: Start accepts. Automaton has 6718 states and 29203 transitions. Word has length 33 [2021-07-13 19:55:47,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:47,488 INFO L482 AbstractCegarLoop]: Abstraction has 6718 states and 29203 transitions. [2021-07-13 19:55:47,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:47,488 INFO L276 IsEmpty]: Start isEmpty. Operand 6718 states and 29203 transitions. [2021-07-13 19:55:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:47,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:47,502 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:47,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:47,703 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:47,703 INFO L82 PathProgramCache]: Analyzing trace with hash -455603768, now seen corresponding path program 67 times [2021-07-13 19:55:47,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:47,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160335612] [2021-07-13 19:55:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:47,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:47,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160335612] [2021-07-13 19:55:47,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160335612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:47,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475432885] [2021-07-13 19:55:47,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:47,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:55:47,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:48,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:48,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 19:55:48,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:48,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:48,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:48,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 19:55:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:48,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475432885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:48,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:48,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:55:48,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274797277] [2021-07-13 19:55:48,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:55:48,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:48,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:55:48,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:55:48,106 INFO L87 Difference]: Start difference. First operand 6718 states and 29203 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:49,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:49,327 INFO L93 Difference]: Finished difference Result 8157 states and 34663 transitions. [2021-07-13 19:55:49,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:55:49,327 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:49,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:49,398 INFO L225 Difference]: With dead ends: 8157 [2021-07-13 19:55:49,398 INFO L226 Difference]: Without dead ends: 8107 [2021-07-13 19:55:49,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 975.0ms TimeCoverageRelationStatistics Valid=277, Invalid=1793, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:55:49,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8107 states. [2021-07-13 19:55:49,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8107 to 6966. [2021-07-13 19:55:49,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6966 states, 6965 states have (on average 4.353481694185212) internal successors, (30322), 6965 states have internal predecessors, (30322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:49,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6966 states to 6966 states and 30322 transitions. [2021-07-13 19:55:49,551 INFO L78 Accepts]: Start accepts. Automaton has 6966 states and 30322 transitions. Word has length 33 [2021-07-13 19:55:49,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:49,551 INFO L482 AbstractCegarLoop]: Abstraction has 6966 states and 30322 transitions. [2021-07-13 19:55:49,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:49,551 INFO L276 IsEmpty]: Start isEmpty. Operand 6966 states and 30322 transitions. [2021-07-13 19:55:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:49,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:49,565 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:49,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:49,766 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:49,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:49,766 INFO L82 PathProgramCache]: Analyzing trace with hash 847668838, now seen corresponding path program 68 times [2021-07-13 19:55:49,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:49,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29072677] [2021-07-13 19:55:49,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:49,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:49,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29072677] [2021-07-13 19:55:49,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29072677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:49,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217545111] [2021-07-13 19:55:49,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:49,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:49,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:49,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:55:49,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:50,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:50,137 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:55:50,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-07-13 19:55:50,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:55:50,164 INFO L628 ElimStorePlain]: treesize reduction 67, result has 24.7 percent of original size [2021-07-13 19:55:50,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:50,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-13 19:55:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:50,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217545111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:50,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:50,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:55:50,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555488920] [2021-07-13 19:55:50,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:55:50,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:50,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:55:50,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:55:50,291 INFO L87 Difference]: Start difference. First operand 6966 states and 30322 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:51,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:51,654 INFO L93 Difference]: Finished difference Result 8100 states and 34390 transitions. [2021-07-13 19:55:51,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:55:51,654 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:51,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:51,679 INFO L225 Difference]: With dead ends: 8100 [2021-07-13 19:55:51,679 INFO L226 Difference]: Without dead ends: 8078 [2021-07-13 19:55:51,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1043.4ms TimeCoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:55:51,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8078 states. [2021-07-13 19:55:51,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8078 to 6917. [2021-07-13 19:55:51,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6917 states, 6916 states have (on average 4.353817235396183) internal successors, (30111), 6916 states have internal predecessors, (30111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6917 states to 6917 states and 30111 transitions. [2021-07-13 19:55:51,873 INFO L78 Accepts]: Start accepts. Automaton has 6917 states and 30111 transitions. Word has length 33 [2021-07-13 19:55:51,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:51,873 INFO L482 AbstractCegarLoop]: Abstraction has 6917 states and 30111 transitions. [2021-07-13 19:55:51,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand 6917 states and 30111 transitions. [2021-07-13 19:55:51,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:51,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:51,888 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:52,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-07-13 19:55:52,088 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:52,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:52,089 INFO L82 PathProgramCache]: Analyzing trace with hash -51693234, now seen corresponding path program 69 times [2021-07-13 19:55:52,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:52,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791474289] [2021-07-13 19:55:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:52,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:52,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:52,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791474289] [2021-07-13 19:55:52,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791474289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:52,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499788238] [2021-07-13 19:55:52,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:52,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:55:52,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:52,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:55:52,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:52,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:52,504 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:55:52,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-07-13 19:55:52,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:55:52,530 INFO L628 ElimStorePlain]: treesize reduction 43, result has 33.8 percent of original size [2021-07-13 19:55:52,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:52,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-13 19:55:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:52,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499788238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:52,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:52,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:55:52,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043044835] [2021-07-13 19:55:52,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:55:52,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:52,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:55:52,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:55:52,656 INFO L87 Difference]: Start difference. First operand 6917 states and 30111 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:55,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:55,983 INFO L93 Difference]: Finished difference Result 7942 states and 34054 transitions. [2021-07-13 19:55:55,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 19:55:55,984 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:55,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:56,006 INFO L225 Difference]: With dead ends: 7942 [2021-07-13 19:55:56,006 INFO L226 Difference]: Without dead ends: 7927 [2021-07-13 19:55:56,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 2652.9ms TimeCoverageRelationStatistics Valid=491, Invalid=4201, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 19:55:56,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-07-13 19:55:56,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 6917. [2021-07-13 19:55:56,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6917 states, 6916 states have (on average 4.353383458646617) internal successors, (30108), 6916 states have internal predecessors, (30108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:56,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6917 states to 6917 states and 30108 transitions. [2021-07-13 19:55:56,159 INFO L78 Accepts]: Start accepts. Automaton has 6917 states and 30108 transitions. Word has length 33 [2021-07-13 19:55:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:56,160 INFO L482 AbstractCegarLoop]: Abstraction has 6917 states and 30108 transitions. [2021-07-13 19:55:56,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 6917 states and 30108 transitions. [2021-07-13 19:55:56,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:56,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:56,173 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:56,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-13 19:55:56,381 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:56,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:56,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1832291536, now seen corresponding path program 70 times [2021-07-13 19:55:56,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:56,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9604842] [2021-07-13 19:55:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:56,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:56,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9604842] [2021-07-13 19:55:56,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9604842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:56,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996622982] [2021-07-13 19:55:56,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:56,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:55:56,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:56,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:55:56,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:56,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:56,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 19:55:56,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:56,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:56,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:56,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 19:55:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:56,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996622982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:56,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:56,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:55:56,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996409133] [2021-07-13 19:55:56,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:55:56,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:56,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:55:56,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:55:56,818 INFO L87 Difference]: Start difference. First operand 6917 states and 30108 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:58,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:58,813 INFO L93 Difference]: Finished difference Result 8117 states and 34723 transitions. [2021-07-13 19:55:58,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 19:55:58,813 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:55:58,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:58,837 INFO L225 Difference]: With dead ends: 8117 [2021-07-13 19:55:58,838 INFO L226 Difference]: Without dead ends: 8082 [2021-07-13 19:55:58,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1587.9ms TimeCoverageRelationStatistics Valid=384, Invalid=2586, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 19:55:58,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8082 states. [2021-07-13 19:55:58,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8082 to 6853. [2021-07-13 19:55:58,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6853 states, 6852 states have (on average 4.355662580268535) internal successors, (29845), 6852 states have internal predecessors, (29845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:58,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 29845 transitions. [2021-07-13 19:55:58,979 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 29845 transitions. Word has length 33 [2021-07-13 19:55:58,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:58,979 INFO L482 AbstractCegarLoop]: Abstraction has 6853 states and 29845 transitions. [2021-07-13 19:55:58,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:58,979 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 29845 transitions. [2021-07-13 19:55:58,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:55:58,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:58,992 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:59,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:59,193 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:59,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:59,193 INFO L82 PathProgramCache]: Analyzing trace with hash 63628552, now seen corresponding path program 71 times [2021-07-13 19:55:59,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:59,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162071697] [2021-07-13 19:55:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:59,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:59,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162071697] [2021-07-13 19:55:59,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162071697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:59,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185244085] [2021-07-13 19:55:59,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:59,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:55:59,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:59,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:55:59,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:59,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:55:59,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:59,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:59,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:59,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-13 19:55:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:59,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185244085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:59,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:59,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:55:59,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911932484] [2021-07-13 19:55:59,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:55:59,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:59,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:55:59,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:55:59,634 INFO L87 Difference]: Start difference. First operand 6853 states and 29845 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:00,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:00,833 INFO L93 Difference]: Finished difference Result 7506 states and 32235 transitions. [2021-07-13 19:56:00,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:56:00,833 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:00,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:00,857 INFO L225 Difference]: With dead ends: 7506 [2021-07-13 19:56:00,857 INFO L226 Difference]: Without dead ends: 7457 [2021-07-13 19:56:00,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1012.6ms TimeCoverageRelationStatistics Valid=221, Invalid=1585, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:56:00,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7457 states. [2021-07-13 19:56:00,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7457 to 6808. [2021-07-13 19:56:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6808 states, 6807 states have (on average 4.354047304245629) internal successors, (29638), 6807 states have internal predecessors, (29638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:00,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6808 states to 6808 states and 29638 transitions. [2021-07-13 19:56:00,981 INFO L78 Accepts]: Start accepts. Automaton has 6808 states and 29638 transitions. Word has length 33 [2021-07-13 19:56:00,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:00,981 INFO L482 AbstractCegarLoop]: Abstraction has 6808 states and 29638 transitions. [2021-07-13 19:56:00,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:00,981 INFO L276 IsEmpty]: Start isEmpty. Operand 6808 states and 29638 transitions. [2021-07-13 19:56:00,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:00,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:00,994 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:01,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:01,195 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:01,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:01,195 INFO L82 PathProgramCache]: Analyzing trace with hash -180288018, now seen corresponding path program 72 times [2021-07-13 19:56:01,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:01,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002168640] [2021-07-13 19:56:01,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:01,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:01,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002168640] [2021-07-13 19:56:01,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002168640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:01,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598294244] [2021-07-13 19:56:01,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:01,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:56:01,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:01,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 19:56:01,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:01,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:01,650 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:56:01,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 19:56:01,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:56:01,687 INFO L628 ElimStorePlain]: treesize reduction 83, result has 21.0 percent of original size [2021-07-13 19:56:01,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:01,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:22 [2021-07-13 19:56:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:01,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598294244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:01,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:01,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:56:01,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994663528] [2021-07-13 19:56:01,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:56:01,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:01,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:56:01,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:56:01,770 INFO L87 Difference]: Start difference. First operand 6808 states and 29638 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:03,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:03,337 INFO L93 Difference]: Finished difference Result 7476 states and 31984 transitions. [2021-07-13 19:56:03,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:56:03,338 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:03,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:03,359 INFO L225 Difference]: With dead ends: 7476 [2021-07-13 19:56:03,359 INFO L226 Difference]: Without dead ends: 7411 [2021-07-13 19:56:03,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1217.6ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:56:03,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7411 states. [2021-07-13 19:56:03,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7411 to 6766. [2021-07-13 19:56:03,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6766 states, 6765 states have (on average 4.349445676274945) internal successors, (29424), 6765 states have internal predecessors, (29424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:03,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6766 states to 6766 states and 29424 transitions. [2021-07-13 19:56:03,501 INFO L78 Accepts]: Start accepts. Automaton has 6766 states and 29424 transitions. Word has length 33 [2021-07-13 19:56:03,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:03,501 INFO L482 AbstractCegarLoop]: Abstraction has 6766 states and 29424 transitions. [2021-07-13 19:56:03,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:03,501 INFO L276 IsEmpty]: Start isEmpty. Operand 6766 states and 29424 transitions. [2021-07-13 19:56:03,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:03,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:03,514 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:03,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:03,714 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:03,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:03,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1974387976, now seen corresponding path program 73 times [2021-07-13 19:56:03,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:03,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758367150] [2021-07-13 19:56:03,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:03,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:03,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758367150] [2021-07-13 19:56:03,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758367150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:03,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984390134] [2021-07-13 19:56:03,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:03,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:03,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:04,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:56:04,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:04,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:04,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:04,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 19:56:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:04,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984390134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:04,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:04,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:56:04,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602823716] [2021-07-13 19:56:04,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:04,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:04,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:04,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:04,130 INFO L87 Difference]: Start difference. First operand 6766 states and 29424 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:05,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:05,180 INFO L93 Difference]: Finished difference Result 7141 states and 30729 transitions. [2021-07-13 19:56:05,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:56:05,180 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:05,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:05,200 INFO L225 Difference]: With dead ends: 7141 [2021-07-13 19:56:05,200 INFO L226 Difference]: Without dead ends: 7080 [2021-07-13 19:56:05,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 800.3ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:56:05,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7080 states. [2021-07-13 19:56:05,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7080 to 6772. [2021-07-13 19:56:05,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6772 states, 6771 states have (on average 4.347954511888938) internal successors, (29440), 6771 states have internal predecessors, (29440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6772 states to 6772 states and 29440 transitions. [2021-07-13 19:56:05,330 INFO L78 Accepts]: Start accepts. Automaton has 6772 states and 29440 transitions. Word has length 33 [2021-07-13 19:56:05,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:05,330 INFO L482 AbstractCegarLoop]: Abstraction has 6772 states and 29440 transitions. [2021-07-13 19:56:05,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 6772 states and 29440 transitions. [2021-07-13 19:56:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:05,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:05,345 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:05,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-07-13 19:56:05,546 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:05,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:05,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1523142808, now seen corresponding path program 74 times [2021-07-13 19:56:05,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:05,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908492906] [2021-07-13 19:56:05,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:05,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:05,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908492906] [2021-07-13 19:56:05,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908492906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:05,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011217954] [2021-07-13 19:56:05,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:05,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:05,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:05,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:05,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:05,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:05,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 19:56:05,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:05,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:05,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:05,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-07-13 19:56:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:06,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011217954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:06,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:06,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:56:06,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271614092] [2021-07-13 19:56:06,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:06,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:06,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:06,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:06,076 INFO L87 Difference]: Start difference. First operand 6772 states and 29440 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:07,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:07,244 INFO L93 Difference]: Finished difference Result 7493 states and 32124 transitions. [2021-07-13 19:56:07,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:56:07,244 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:07,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:07,265 INFO L225 Difference]: With dead ends: 7493 [2021-07-13 19:56:07,265 INFO L226 Difference]: Without dead ends: 7447 [2021-07-13 19:56:07,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 953.4ms TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:56:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7447 states. [2021-07-13 19:56:07,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7447 to 6745. [2021-07-13 19:56:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6745 states, 6744 states have (on average 4.347419928825623) internal successors, (29319), 6744 states have internal predecessors, (29319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6745 states to 6745 states and 29319 transitions. [2021-07-13 19:56:07,394 INFO L78 Accepts]: Start accepts. Automaton has 6745 states and 29319 transitions. Word has length 33 [2021-07-13 19:56:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:07,394 INFO L482 AbstractCegarLoop]: Abstraction has 6745 states and 29319 transitions. [2021-07-13 19:56:07,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:07,394 INFO L276 IsEmpty]: Start isEmpty. Operand 6745 states and 29319 transitions. [2021-07-13 19:56:07,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:07,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:07,409 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:07,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:07,609 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:07,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:07,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1029994050, now seen corresponding path program 75 times [2021-07-13 19:56:07,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:07,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286158873] [2021-07-13 19:56:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:07,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:07,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286158873] [2021-07-13 19:56:07,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286158873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:07,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387694402] [2021-07-13 19:56:07,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:07,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:56:07,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:07,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:07,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:07,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:07,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 19:56:07,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:07,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:07,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:07,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-13 19:56:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:08,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387694402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:08,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:08,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:56:08,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226170487] [2021-07-13 19:56:08,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:08,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:08,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:08,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:08,131 INFO L87 Difference]: Start difference. First operand 6745 states and 29319 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:10,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:10,352 INFO L93 Difference]: Finished difference Result 8079 states and 34659 transitions. [2021-07-13 19:56:10,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:56:10,352 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:10,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:10,376 INFO L225 Difference]: With dead ends: 8079 [2021-07-13 19:56:10,376 INFO L226 Difference]: Without dead ends: 8060 [2021-07-13 19:56:10,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1792.1ms TimeCoverageRelationStatistics Valid=357, Invalid=1995, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:56:10,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8060 states. [2021-07-13 19:56:10,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8060 to 6853. [2021-07-13 19:56:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6853 states, 6852 states have (on average 4.350992410974897) internal successors, (29813), 6852 states have internal predecessors, (29813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:10,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 29813 transitions. [2021-07-13 19:56:10,512 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 29813 transitions. Word has length 33 [2021-07-13 19:56:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:10,512 INFO L482 AbstractCegarLoop]: Abstraction has 6853 states and 29813 transitions. [2021-07-13 19:56:10,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:10,512 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 29813 transitions. [2021-07-13 19:56:10,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:10,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:10,525 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:10,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-07-13 19:56:10,726 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:10,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:10,726 INFO L82 PathProgramCache]: Analyzing trace with hash 273278556, now seen corresponding path program 76 times [2021-07-13 19:56:10,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:10,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562724175] [2021-07-13 19:56:10,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:10,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:10,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562724175] [2021-07-13 19:56:10,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562724175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:10,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312264938] [2021-07-13 19:56:10,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:10,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:10,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:10,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:10,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:11,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:11,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 19:56:11,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:11,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:11,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:11,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 19:56:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:11,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312264938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:11,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:11,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:56:11,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719120367] [2021-07-13 19:56:11,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:11,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:11,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:11,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:11,090 INFO L87 Difference]: Start difference. First operand 6853 states and 29813 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:12,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:12,146 INFO L93 Difference]: Finished difference Result 8584 states and 36474 transitions. [2021-07-13 19:56:12,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:56:12,146 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:12,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:12,171 INFO L225 Difference]: With dead ends: 8584 [2021-07-13 19:56:12,171 INFO L226 Difference]: Without dead ends: 8556 [2021-07-13 19:56:12,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 697.6ms TimeCoverageRelationStatistics Valid=257, Invalid=1465, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:56:12,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8556 states. [2021-07-13 19:56:12,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8556 to 6958. [2021-07-13 19:56:12,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6958 states, 6957 states have (on average 4.358919074313641) internal successors, (30325), 6957 states have internal predecessors, (30325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6958 states to 6958 states and 30325 transitions. [2021-07-13 19:56:12,331 INFO L78 Accepts]: Start accepts. Automaton has 6958 states and 30325 transitions. Word has length 33 [2021-07-13 19:56:12,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:12,331 INFO L482 AbstractCegarLoop]: Abstraction has 6958 states and 30325 transitions. [2021-07-13 19:56:12,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 6958 states and 30325 transitions. [2021-07-13 19:56:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:12,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:12,346 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:12,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:12,546 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:12,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:12,546 INFO L82 PathProgramCache]: Analyzing trace with hash 219892036, now seen corresponding path program 77 times [2021-07-13 19:56:12,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:12,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95450298] [2021-07-13 19:56:12,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:12,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:12,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95450298] [2021-07-13 19:56:12,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95450298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:12,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110839955] [2021-07-13 19:56:12,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:12,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:56:12,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:12,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:12,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:12,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:12,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 19:56:12,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:12,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:12,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:12,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 19:56:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:12,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110839955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:12,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:12,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:56:12,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740443225] [2021-07-13 19:56:12,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:12,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:12,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:12,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:12,916 INFO L87 Difference]: Start difference. First operand 6958 states and 30325 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:13,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:13,921 INFO L93 Difference]: Finished difference Result 8561 states and 36382 transitions. [2021-07-13 19:56:13,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:56:13,921 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:13,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:13,945 INFO L225 Difference]: With dead ends: 8561 [2021-07-13 19:56:13,945 INFO L226 Difference]: Without dead ends: 8528 [2021-07-13 19:56:13,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 661.5ms TimeCoverageRelationStatistics Valid=245, Invalid=1315, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:56:13,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8528 states. [2021-07-13 19:56:14,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8528 to 6933. [2021-07-13 19:56:14,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6933 states, 6932 states have (on average 4.360357761107905) internal successors, (30226), 6932 states have internal predecessors, (30226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:14,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6933 states to 6933 states and 30226 transitions. [2021-07-13 19:56:14,141 INFO L78 Accepts]: Start accepts. Automaton has 6933 states and 30226 transitions. Word has length 33 [2021-07-13 19:56:14,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:14,141 INFO L482 AbstractCegarLoop]: Abstraction has 6933 states and 30226 transitions. [2021-07-13 19:56:14,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:14,141 INFO L276 IsEmpty]: Start isEmpty. Operand 6933 states and 30226 transitions. [2021-07-13 19:56:14,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:14,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:14,154 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:14,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:14,354 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:14,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:14,355 INFO L82 PathProgramCache]: Analyzing trace with hash -2012246164, now seen corresponding path program 78 times [2021-07-13 19:56:14,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:14,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124809048] [2021-07-13 19:56:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:14,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:14,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124809048] [2021-07-13 19:56:14,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124809048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:14,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820810139] [2021-07-13 19:56:14,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:14,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:56:14,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:14,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 19:56:14,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:14,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:14,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:14,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 19:56:14,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:14,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:14,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:14,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:39 [2021-07-13 19:56:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:14,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820810139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:14,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:14,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 19:56:14,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477085535] [2021-07-13 19:56:14,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:14,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:14,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:14,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:14,830 INFO L87 Difference]: Start difference. First operand 6933 states and 30226 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:16,275 INFO L93 Difference]: Finished difference Result 7914 states and 34231 transitions. [2021-07-13 19:56:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:56:16,275 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:16,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:16,298 INFO L225 Difference]: With dead ends: 7914 [2021-07-13 19:56:16,298 INFO L226 Difference]: Without dead ends: 7899 [2021-07-13 19:56:16,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1039.8ms TimeCoverageRelationStatistics Valid=263, Invalid=1899, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:56:16,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7899 states. [2021-07-13 19:56:16,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7899 to 6921. [2021-07-13 19:56:16,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6921 states, 6920 states have (on average 4.361705202312138) internal successors, (30183), 6920 states have internal predecessors, (30183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:16,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6921 states to 6921 states and 30183 transitions. [2021-07-13 19:56:16,487 INFO L78 Accepts]: Start accepts. Automaton has 6921 states and 30183 transitions. Word has length 33 [2021-07-13 19:56:16,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:16,487 INFO L482 AbstractCegarLoop]: Abstraction has 6921 states and 30183 transitions. [2021-07-13 19:56:16,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:16,488 INFO L276 IsEmpty]: Start isEmpty. Operand 6921 states and 30183 transitions. [2021-07-13 19:56:16,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:16,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:16,501 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:16,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:16,702 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:16,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:16,702 INFO L82 PathProgramCache]: Analyzing trace with hash 63209602, now seen corresponding path program 79 times [2021-07-13 19:56:16,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:16,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745208823] [2021-07-13 19:56:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:16,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:16,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745208823] [2021-07-13 19:56:16,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745208823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:16,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434830665] [2021-07-13 19:56:16,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:16,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:16,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:17,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:17,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 19:56:17,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:17,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:17,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:17,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-07-13 19:56:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:17,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434830665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:17,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:17,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:56:17,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778311506] [2021-07-13 19:56:17,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:17,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:17,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:17,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:17,104 INFO L87 Difference]: Start difference. First operand 6921 states and 30183 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:18,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:18,184 INFO L93 Difference]: Finished difference Result 7735 states and 33462 transitions. [2021-07-13 19:56:18,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:56:18,185 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:18,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:18,207 INFO L225 Difference]: With dead ends: 7735 [2021-07-13 19:56:18,208 INFO L226 Difference]: Without dead ends: 7720 [2021-07-13 19:56:18,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 731.4ms TimeCoverageRelationStatistics Valid=190, Invalid=1532, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:56:18,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7720 states. [2021-07-13 19:56:18,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7720 to 6921. [2021-07-13 19:56:18,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6921 states, 6920 states have (on average 4.3621387283237) internal successors, (30186), 6920 states have internal predecessors, (30186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:18,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6921 states to 6921 states and 30186 transitions. [2021-07-13 19:56:18,344 INFO L78 Accepts]: Start accepts. Automaton has 6921 states and 30186 transitions. Word has length 33 [2021-07-13 19:56:18,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:18,344 INFO L482 AbstractCegarLoop]: Abstraction has 6921 states and 30186 transitions. [2021-07-13 19:56:18,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:18,344 INFO L276 IsEmpty]: Start isEmpty. Operand 6921 states and 30186 transitions. [2021-07-13 19:56:18,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:18,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:18,357 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:18,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:18,558 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:18,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:18,558 INFO L82 PathProgramCache]: Analyzing trace with hash 919293570, now seen corresponding path program 80 times [2021-07-13 19:56:18,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:18,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383166174] [2021-07-13 19:56:18,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:18,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:18,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383166174] [2021-07-13 19:56:18,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383166174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:18,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354050253] [2021-07-13 19:56:18,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:18,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:18,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:18,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:18,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:18,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:18,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 19:56:18,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:18,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:18,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:18,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 19:56:19,044 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 30 [2021-07-13 19:56:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:19,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354050253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:19,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:19,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:56:19,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398517104] [2021-07-13 19:56:19,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:19,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:19,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:19,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:19,227 INFO L87 Difference]: Start difference. First operand 6921 states and 30186 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:21,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:21,463 INFO L93 Difference]: Finished difference Result 7947 states and 34282 transitions. [2021-07-13 19:56:21,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:56:21,464 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:21,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:21,486 INFO L225 Difference]: With dead ends: 7947 [2021-07-13 19:56:21,486 INFO L226 Difference]: Without dead ends: 7928 [2021-07-13 19:56:21,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 2019.4ms TimeCoverageRelationStatistics Valid=425, Invalid=2227, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 19:56:21,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7928 states. [2021-07-13 19:56:21,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7928 to 7007. [2021-07-13 19:56:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7007 states, 7006 states have (on average 4.363260062803311) internal successors, (30569), 7006 states have internal predecessors, (30569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:21,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7007 states to 7007 states and 30569 transitions. [2021-07-13 19:56:21,658 INFO L78 Accepts]: Start accepts. Automaton has 7007 states and 30569 transitions. Word has length 33 [2021-07-13 19:56:21,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:21,658 INFO L482 AbstractCegarLoop]: Abstraction has 7007 states and 30569 transitions. [2021-07-13 19:56:21,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:21,658 INFO L276 IsEmpty]: Start isEmpty. Operand 7007 states and 30569 transitions. [2021-07-13 19:56:21,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:21,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:21,672 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:21,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-13 19:56:21,873 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:21,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:21,873 INFO L82 PathProgramCache]: Analyzing trace with hash -2072401120, now seen corresponding path program 81 times [2021-07-13 19:56:21,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:21,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703878140] [2021-07-13 19:56:21,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:22,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:22,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703878140] [2021-07-13 19:56:22,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703878140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:22,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233117584] [2021-07-13 19:56:22,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:22,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:56:22,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:22,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:22,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:22,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:22,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 19:56:22,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:22,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:22,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:22,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 19:56:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:22,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233117584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:22,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:22,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 19:56:22,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753621167] [2021-07-13 19:56:22,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:22,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:22,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:22,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:22,372 INFO L87 Difference]: Start difference. First operand 7007 states and 30569 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:24,149 INFO L93 Difference]: Finished difference Result 7712 states and 33332 transitions. [2021-07-13 19:56:24,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:56:24,150 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:24,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:24,171 INFO L225 Difference]: With dead ends: 7712 [2021-07-13 19:56:24,171 INFO L226 Difference]: Without dead ends: 7699 [2021-07-13 19:56:24,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1589.9ms TimeCoverageRelationStatistics Valid=408, Invalid=1944, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:56:24,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7699 states. [2021-07-13 19:56:24,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7699 to 6991. [2021-07-13 19:56:24,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6991 states, 6990 states have (on average 4.365951359084407) internal successors, (30518), 6990 states have internal predecessors, (30518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:24,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 30518 transitions. [2021-07-13 19:56:24,295 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 30518 transitions. Word has length 33 [2021-07-13 19:56:24,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:24,295 INFO L482 AbstractCegarLoop]: Abstraction has 6991 states and 30518 transitions. [2021-07-13 19:56:24,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:24,296 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 30518 transitions. [2021-07-13 19:56:24,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:24,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:24,309 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:24,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:24,510 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:24,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:24,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1323204104, now seen corresponding path program 82 times [2021-07-13 19:56:24,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:24,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412816802] [2021-07-13 19:56:24,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:24,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:24,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412816802] [2021-07-13 19:56:24,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412816802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:24,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038972294] [2021-07-13 19:56:24,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:24,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:24,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:24,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:24,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:24,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:56:24,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:24,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:24,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:24,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 19:56:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:24,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038972294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:24,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:24,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:56:24,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820711451] [2021-07-13 19:56:24,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:24,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:24,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:24,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:24,888 INFO L87 Difference]: Start difference. First operand 6991 states and 30518 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:26,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:26,162 INFO L93 Difference]: Finished difference Result 8547 states and 36564 transitions. [2021-07-13 19:56:26,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:56:26,162 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:26,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:26,185 INFO L225 Difference]: With dead ends: 8547 [2021-07-13 19:56:26,186 INFO L226 Difference]: Without dead ends: 8517 [2021-07-13 19:56:26,186 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1027.0ms TimeCoverageRelationStatistics Valid=424, Invalid=2126, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:56:26,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8517 states. [2021-07-13 19:56:26,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8517 to 7100. [2021-07-13 19:56:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7100 states, 7099 states have (on average 4.368643470911396) internal successors, (31013), 7099 states have internal predecessors, (31013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:26,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7100 states to 7100 states and 31013 transitions. [2021-07-13 19:56:26,371 INFO L78 Accepts]: Start accepts. Automaton has 7100 states and 31013 transitions. Word has length 33 [2021-07-13 19:56:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:26,372 INFO L482 AbstractCegarLoop]: Abstraction has 7100 states and 31013 transitions. [2021-07-13 19:56:26,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 7100 states and 31013 transitions. [2021-07-13 19:56:26,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:26,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:26,386 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:26,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:26,586 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:26,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:26,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2125787640, now seen corresponding path program 83 times [2021-07-13 19:56:26,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:26,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558871443] [2021-07-13 19:56:26,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:26,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:26,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558871443] [2021-07-13 19:56:26,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558871443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:26,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628365417] [2021-07-13 19:56:26,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:26,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:56:26,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:26,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:26,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:26,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:26,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 19:56:26,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:26,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:26,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:26,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 19:56:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:26,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628365417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:26,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:26,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:56:26,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342845606] [2021-07-13 19:56:26,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:26,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:26,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:26,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:26,949 INFO L87 Difference]: Start difference. First operand 7100 states and 31013 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:27,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:27,945 INFO L93 Difference]: Finished difference Result 8299 states and 35564 transitions. [2021-07-13 19:56:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:56:27,945 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:27,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:27,968 INFO L225 Difference]: With dead ends: 8299 [2021-07-13 19:56:27,968 INFO L226 Difference]: Without dead ends: 8262 [2021-07-13 19:56:27,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 739.4ms TimeCoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:56:27,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8262 states. [2021-07-13 19:56:28,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8262 to 7060. [2021-07-13 19:56:28,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7060 states, 7059 states have (on average 4.370307408981442) internal successors, (30850), 7059 states have internal predecessors, (30850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:28,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7060 states to 7060 states and 30850 transitions. [2021-07-13 19:56:28,115 INFO L78 Accepts]: Start accepts. Automaton has 7060 states and 30850 transitions. Word has length 33 [2021-07-13 19:56:28,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:28,115 INFO L482 AbstractCegarLoop]: Abstraction has 7060 states and 30850 transitions. [2021-07-13 19:56:28,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:28,115 INFO L276 IsEmpty]: Start isEmpty. Operand 7060 states and 30850 transitions. [2021-07-13 19:56:28,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:28,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:28,129 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:28,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:28,329 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:28,330 INFO L82 PathProgramCache]: Analyzing trace with hash -62958544, now seen corresponding path program 84 times [2021-07-13 19:56:28,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:28,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521587455] [2021-07-13 19:56:28,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:28,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:28,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521587455] [2021-07-13 19:56:28,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521587455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:28,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137593916] [2021-07-13 19:56:28,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:28,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:56:28,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:28,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:28,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:28,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:28,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 19:56:28,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:28,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:28,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:28,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 19:56:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:28,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137593916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:28,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:28,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:56:28,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647753346] [2021-07-13 19:56:28,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:56:28,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:28,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:56:28,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:56:28,887 INFO L87 Difference]: Start difference. First operand 7060 states and 30850 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:30,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:30,069 INFO L93 Difference]: Finished difference Result 7670 states and 33332 transitions. [2021-07-13 19:56:30,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:56:30,069 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:30,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:30,091 INFO L225 Difference]: With dead ends: 7670 [2021-07-13 19:56:30,091 INFO L226 Difference]: Without dead ends: 7655 [2021-07-13 19:56:30,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1099.2ms TimeCoverageRelationStatistics Valid=229, Invalid=1751, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:56:30,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7655 states. [2021-07-13 19:56:30,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7655 to 7045. [2021-07-13 19:56:30,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7045 states, 7044 states have (on average 4.371663827370812) internal successors, (30794), 7044 states have internal predecessors, (30794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:30,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7045 states to 7045 states and 30794 transitions. [2021-07-13 19:56:30,225 INFO L78 Accepts]: Start accepts. Automaton has 7045 states and 30794 transitions. Word has length 33 [2021-07-13 19:56:30,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:30,225 INFO L482 AbstractCegarLoop]: Abstraction has 7045 states and 30794 transitions. [2021-07-13 19:56:30,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:30,225 INFO L276 IsEmpty]: Start isEmpty. Operand 7045 states and 30794 transitions. [2021-07-13 19:56:30,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:30,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:30,239 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:30,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:30,439 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:30,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:30,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1111730946, now seen corresponding path program 85 times [2021-07-13 19:56:30,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:30,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956807668] [2021-07-13 19:56:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:30,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:30,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956807668] [2021-07-13 19:56:30,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956807668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:30,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240980402] [2021-07-13 19:56:30,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:30,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:30,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:30,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:56:30,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:30,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:30,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:30,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 19:56:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:30,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240980402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:30,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:30,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:56:30,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167585622] [2021-07-13 19:56:30,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:30,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:30,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:30,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:30,859 INFO L87 Difference]: Start difference. First operand 7045 states and 30794 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:32,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:32,298 INFO L93 Difference]: Finished difference Result 8598 states and 36819 transitions. [2021-07-13 19:56:32,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:56:32,298 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:32,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:32,323 INFO L225 Difference]: With dead ends: 8598 [2021-07-13 19:56:32,323 INFO L226 Difference]: Without dead ends: 8560 [2021-07-13 19:56:32,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1198.5ms TimeCoverageRelationStatistics Valid=490, Invalid=2480, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 19:56:32,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8560 states. [2021-07-13 19:56:32,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8560 to 7222. [2021-07-13 19:56:32,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7222 states, 7221 states have (on average 4.377371555186262) internal successors, (31609), 7221 states have internal predecessors, (31609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7222 states to 7222 states and 31609 transitions. [2021-07-13 19:56:32,467 INFO L78 Accepts]: Start accepts. Automaton has 7222 states and 31609 transitions. Word has length 33 [2021-07-13 19:56:32,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:32,468 INFO L482 AbstractCegarLoop]: Abstraction has 7222 states and 31609 transitions. [2021-07-13 19:56:32,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 7222 states and 31609 transitions. [2021-07-13 19:56:32,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:32,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:32,482 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:32,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:32,682 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:32,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:32,682 INFO L82 PathProgramCache]: Analyzing trace with hash 191541660, now seen corresponding path program 86 times [2021-07-13 19:56:32,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:32,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468973442] [2021-07-13 19:56:32,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:32,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:32,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468973442] [2021-07-13 19:56:32,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468973442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:32,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953963765] [2021-07-13 19:56:32,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:32,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:32,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:32,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:32,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:32,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:32,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 19:56:32,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:32,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:32,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:32,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 19:56:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:33,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953963765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:33,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:33,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 19:56:33,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201381086] [2021-07-13 19:56:33,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:33,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:33,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:33,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:33,200 INFO L87 Difference]: Start difference. First operand 7222 states and 31609 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:34,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:34,906 INFO L93 Difference]: Finished difference Result 8005 states and 34609 transitions. [2021-07-13 19:56:34,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:56:34,906 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:34,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:34,928 INFO L225 Difference]: With dead ends: 8005 [2021-07-13 19:56:34,928 INFO L226 Difference]: Without dead ends: 7992 [2021-07-13 19:56:34,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1393.6ms TimeCoverageRelationStatistics Valid=376, Invalid=1880, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:56:34,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7992 states. [2021-07-13 19:56:35,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7992 to 7222. [2021-07-13 19:56:35,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7222 states, 7221 states have (on average 4.376956100263121) internal successors, (31606), 7221 states have internal predecessors, (31606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:35,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7222 states to 7222 states and 31606 transitions. [2021-07-13 19:56:35,060 INFO L78 Accepts]: Start accepts. Automaton has 7222 states and 31606 transitions. Word has length 33 [2021-07-13 19:56:35,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:35,061 INFO L482 AbstractCegarLoop]: Abstraction has 7222 states and 31606 transitions. [2021-07-13 19:56:35,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:35,061 INFO L276 IsEmpty]: Start isEmpty. Operand 7222 states and 31606 transitions. [2021-07-13 19:56:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:35,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:35,074 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:35,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:35,277 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:35,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:35,278 INFO L82 PathProgramCache]: Analyzing trace with hash -707820412, now seen corresponding path program 87 times [2021-07-13 19:56:35,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:35,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020599169] [2021-07-13 19:56:35,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:35,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:35,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020599169] [2021-07-13 19:56:35,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020599169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:35,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72198791] [2021-07-13 19:56:35,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:35,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:56:35,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:35,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 19:56:35,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:35,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:35,711 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:56:35,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 19:56:35,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:35,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-07-13 19:56:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:35,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72198791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:35,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:35,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:56:35,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319004418] [2021-07-13 19:56:35,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:56:35,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:35,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:56:35,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:56:35,891 INFO L87 Difference]: Start difference. First operand 7222 states and 31606 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:37,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:37,385 INFO L93 Difference]: Finished difference Result 8363 states and 36081 transitions. [2021-07-13 19:56:37,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:56:37,385 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:37,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:37,412 INFO L225 Difference]: With dead ends: 8363 [2021-07-13 19:56:37,413 INFO L226 Difference]: Without dead ends: 8327 [2021-07-13 19:56:37,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1189.9ms TimeCoverageRelationStatistics Valid=328, Invalid=2428, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:56:37,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8327 states. [2021-07-13 19:56:37,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8327 to 7367. [2021-07-13 19:56:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7367 states, 7366 states have (on average 4.384469182731469) internal successors, (32296), 7366 states have internal predecessors, (32296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7367 states to 7367 states and 32296 transitions. [2021-07-13 19:56:37,560 INFO L78 Accepts]: Start accepts. Automaton has 7367 states and 32296 transitions. Word has length 33 [2021-07-13 19:56:37,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:37,560 INFO L482 AbstractCegarLoop]: Abstraction has 7367 states and 32296 transitions. [2021-07-13 19:56:37,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:37,560 INFO L276 IsEmpty]: Start isEmpty. Operand 7367 states and 32296 transitions. [2021-07-13 19:56:37,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:37,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:37,574 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:37,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:37,774 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:37,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:37,775 INFO L82 PathProgramCache]: Analyzing trace with hash -592498626, now seen corresponding path program 88 times [2021-07-13 19:56:37,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:37,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466323584] [2021-07-13 19:56:37,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:37,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:37,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466323584] [2021-07-13 19:56:37,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466323584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:37,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476634694] [2021-07-13 19:56:37,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:38,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:38,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:38,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:38,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:38,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:56:38,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:38,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:38,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:38,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 19:56:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:38,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476634694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:38,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:38,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:56:38,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470425182] [2021-07-13 19:56:38,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:38,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:38,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:38,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:38,237 INFO L87 Difference]: Start difference. First operand 7367 states and 32296 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:39,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:39,615 INFO L93 Difference]: Finished difference Result 8492 states and 36675 transitions. [2021-07-13 19:56:39,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:56:39,615 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:39,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:39,640 INFO L225 Difference]: With dead ends: 8492 [2021-07-13 19:56:39,640 INFO L226 Difference]: Without dead ends: 8454 [2021-07-13 19:56:39,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1144.3ms TimeCoverageRelationStatistics Valid=305, Invalid=2047, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:56:39,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8454 states. [2021-07-13 19:56:39,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8454 to 7370. [2021-07-13 19:56:39,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7370 states, 7369 states have (on average 4.384041253901479) internal successors, (32306), 7369 states have internal predecessors, (32306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:39,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7370 states to 7370 states and 32306 transitions. [2021-07-13 19:56:39,806 INFO L78 Accepts]: Start accepts. Automaton has 7370 states and 32306 transitions. Word has length 33 [2021-07-13 19:56:39,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:39,806 INFO L482 AbstractCegarLoop]: Abstraction has 7370 states and 32306 transitions. [2021-07-13 19:56:39,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:39,807 INFO L276 IsEmpty]: Start isEmpty. Operand 7370 states and 32306 transitions. [2021-07-13 19:56:39,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:39,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:39,822 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:40,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:40,022 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:40,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:40,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1527321056, now seen corresponding path program 89 times [2021-07-13 19:56:40,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:40,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294033310] [2021-07-13 19:56:40,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:40,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:40,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294033310] [2021-07-13 19:56:40,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294033310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:40,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657519291] [2021-07-13 19:56:40,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:40,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:56:40,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:40,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:40,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:40,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:40,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 19:56:40,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:40,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:40,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:40,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 19:56:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:40,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657519291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:40,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:40,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:56:40,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242975729] [2021-07-13 19:56:40,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:40,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:40,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:40,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:40,439 INFO L87 Difference]: Start difference. First operand 7370 states and 32306 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:41,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:41,499 INFO L93 Difference]: Finished difference Result 8292 states and 35787 transitions. [2021-07-13 19:56:41,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:56:41,499 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:41,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:41,523 INFO L225 Difference]: With dead ends: 8292 [2021-07-13 19:56:41,523 INFO L226 Difference]: Without dead ends: 8270 [2021-07-13 19:56:41,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 867.5ms TimeCoverageRelationStatistics Valid=296, Invalid=1684, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:56:41,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8270 states. [2021-07-13 19:56:41,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8270 to 7358. [2021-07-13 19:56:41,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7358 states, 7357 states have (on average 4.384939513388609) internal successors, (32260), 7357 states have internal predecessors, (32260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:41,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7358 states to 7358 states and 32260 transitions. [2021-07-13 19:56:41,667 INFO L78 Accepts]: Start accepts. Automaton has 7358 states and 32260 transitions. Word has length 33 [2021-07-13 19:56:41,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:41,667 INFO L482 AbstractCegarLoop]: Abstraction has 7358 states and 32260 transitions. [2021-07-13 19:56:41,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:41,667 INFO L276 IsEmpty]: Start isEmpty. Operand 7358 states and 32260 transitions. [2021-07-13 19:56:41,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:41,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:41,681 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:41,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-07-13 19:56:41,882 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:41,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1429633532, now seen corresponding path program 90 times [2021-07-13 19:56:41,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:41,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962069901] [2021-07-13 19:56:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:42,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:42,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962069901] [2021-07-13 19:56:42,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962069901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:42,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250659531] [2021-07-13 19:56:42,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:42,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:56:42,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:42,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:42,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:42,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:42,206 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:56:42,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 19:56:42,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:42,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:42,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:42,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-07-13 19:56:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:42,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250659531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:42,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:42,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 19:56:42,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917961221] [2021-07-13 19:56:42,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:42,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:42,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:42,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:42,429 INFO L87 Difference]: Start difference. First operand 7358 states and 32260 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:43,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:43,714 INFO L93 Difference]: Finished difference Result 8169 states and 35434 transitions. [2021-07-13 19:56:43,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:56:43,714 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:43,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:43,737 INFO L225 Difference]: With dead ends: 8169 [2021-07-13 19:56:43,737 INFO L226 Difference]: Without dead ends: 8151 [2021-07-13 19:56:43,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1115.8ms TimeCoverageRelationStatistics Valid=370, Invalid=2180, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:56:43,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2021-07-13 19:56:43,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 7388. [2021-07-13 19:56:43,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7388 states, 7387 states have (on average 4.385948287532151) internal successors, (32399), 7387 states have internal predecessors, (32399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:43,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7388 states to 7388 states and 32399 transitions. [2021-07-13 19:56:43,874 INFO L78 Accepts]: Start accepts. Automaton has 7388 states and 32399 transitions. Word has length 33 [2021-07-13 19:56:43,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:43,874 INFO L482 AbstractCegarLoop]: Abstraction has 7388 states and 32399 transitions. [2021-07-13 19:56:43,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 7388 states and 32399 transitions. [2021-07-13 19:56:43,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:43,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:43,888 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:44,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-07-13 19:56:44,089 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:44,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:44,089 INFO L82 PathProgramCache]: Analyzing trace with hash -660602162, now seen corresponding path program 91 times [2021-07-13 19:56:44,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:44,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227820950] [2021-07-13 19:56:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:44,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:44,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227820950] [2021-07-13 19:56:44,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227820950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:44,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295830081] [2021-07-13 19:56:44,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:44,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:44,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:44,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:44,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 19:56:44,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:44,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:44,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:44,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 19:56:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:44,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295830081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:44,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:44,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:56:44,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852694903] [2021-07-13 19:56:44,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:44,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:44,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:44,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:44,529 INFO L87 Difference]: Start difference. First operand 7388 states and 32399 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:46,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:46,219 INFO L93 Difference]: Finished difference Result 9019 states and 38521 transitions. [2021-07-13 19:56:46,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:56:46,219 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:46,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:46,244 INFO L225 Difference]: With dead ends: 9019 [2021-07-13 19:56:46,244 INFO L226 Difference]: Without dead ends: 8973 [2021-07-13 19:56:46,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1461.1ms TimeCoverageRelationStatistics Valid=426, Invalid=2024, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:56:46,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8973 states. [2021-07-13 19:56:46,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8973 to 7590. [2021-07-13 19:56:46,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7590 states, 7589 states have (on average 4.388193437870602) internal successors, (33302), 7589 states have internal predecessors, (33302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:46,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7590 states to 7590 states and 33302 transitions. [2021-07-13 19:56:46,407 INFO L78 Accepts]: Start accepts. Automaton has 7590 states and 33302 transitions. Word has length 33 [2021-07-13 19:56:46,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:46,408 INFO L482 AbstractCegarLoop]: Abstraction has 7590 states and 33302 transitions. [2021-07-13 19:56:46,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:46,408 INFO L276 IsEmpty]: Start isEmpty. Operand 7590 states and 33302 transitions. [2021-07-13 19:56:46,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:46,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:46,422 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:46,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:46,623 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:46,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:46,623 INFO L82 PathProgramCache]: Analyzing trace with hash 185373390, now seen corresponding path program 92 times [2021-07-13 19:56:46,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:46,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91685841] [2021-07-13 19:56:46,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:46,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:46,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91685841] [2021-07-13 19:56:46,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91685841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:46,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154108568] [2021-07-13 19:56:46,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:46,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:46,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:46,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:46,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:46,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:46,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-13 19:56:46,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:47,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:47,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:47,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-13 19:56:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:47,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154108568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:47,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:47,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:56:47,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125347888] [2021-07-13 19:56:47,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:47,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:47,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:47,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:47,233 INFO L87 Difference]: Start difference. First operand 7590 states and 33302 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:47,385 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-07-13 19:56:47,510 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-07-13 19:56:50,774 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-07-13 19:56:50,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:50,951 INFO L93 Difference]: Finished difference Result 9839 states and 40785 transitions. [2021-07-13 19:56:50,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 19:56:50,951 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:50,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:50,977 INFO L225 Difference]: With dead ends: 9839 [2021-07-13 19:56:50,978 INFO L226 Difference]: Without dead ends: 9778 [2021-07-13 19:56:50,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 3196.2ms TimeCoverageRelationStatistics Valid=766, Invalid=4490, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 19:56:50,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9778 states. [2021-07-13 19:56:51,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9778 to 7574. [2021-07-13 19:56:51,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7574 states, 7573 states have (on average 4.386108543509837) internal successors, (33216), 7573 states have internal predecessors, (33216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:51,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7574 states to 7574 states and 33216 transitions. [2021-07-13 19:56:51,140 INFO L78 Accepts]: Start accepts. Automaton has 7574 states and 33216 transitions. Word has length 33 [2021-07-13 19:56:51,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:51,140 INFO L482 AbstractCegarLoop]: Abstraction has 7574 states and 33216 transitions. [2021-07-13 19:56:51,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:51,140 INFO L276 IsEmpty]: Start isEmpty. Operand 7574 states and 33216 transitions. [2021-07-13 19:56:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:51,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:51,155 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:51,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-13 19:56:51,361 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:51,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:51,361 INFO L82 PathProgramCache]: Analyzing trace with hash -2046764810, now seen corresponding path program 93 times [2021-07-13 19:56:51,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:51,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819332572] [2021-07-13 19:56:51,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:51,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:51,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819332572] [2021-07-13 19:56:51,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819332572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:51,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278209633] [2021-07-13 19:56:51,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:51,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:56:51,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:51,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:51,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:51,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:51,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 19:56:51,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:51,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:51,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:51,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 19:56:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:51,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278209633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:51,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:51,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:56:51,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576396462] [2021-07-13 19:56:51,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:56:51,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:51,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:56:51,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:56:51,942 INFO L87 Difference]: Start difference. First operand 7574 states and 33216 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:52,225 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-07-13 19:56:54,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:54,870 INFO L93 Difference]: Finished difference Result 9502 states and 39745 transitions. [2021-07-13 19:56:54,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 19:56:54,870 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:54,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:54,896 INFO L225 Difference]: With dead ends: 9502 [2021-07-13 19:56:54,896 INFO L226 Difference]: Without dead ends: 9444 [2021-07-13 19:56:54,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 2545.0ms TimeCoverageRelationStatistics Valid=466, Invalid=3566, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 19:56:54,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9444 states. [2021-07-13 19:56:55,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9444 to 7577. [2021-07-13 19:56:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7577 states, 7576 states have (on average 4.384767687434002) internal successors, (33219), 7576 states have internal predecessors, (33219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:55,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7577 states to 7577 states and 33219 transitions. [2021-07-13 19:56:55,078 INFO L78 Accepts]: Start accepts. Automaton has 7577 states and 33219 transitions. Word has length 33 [2021-07-13 19:56:55,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:55,078 INFO L482 AbstractCegarLoop]: Abstraction has 7577 states and 33219 transitions. [2021-07-13 19:56:55,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:55,078 INFO L276 IsEmpty]: Start isEmpty. Operand 7577 states and 33219 transitions. [2021-07-13 19:56:55,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:55,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:55,093 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:55,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-13 19:56:55,294 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:55,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:55,294 INFO L82 PathProgramCache]: Analyzing trace with hash 37827988, now seen corresponding path program 94 times [2021-07-13 19:56:55,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:55,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577273911] [2021-07-13 19:56:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:55,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:55,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577273911] [2021-07-13 19:56:55,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577273911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:55,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756444621] [2021-07-13 19:56:55,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:55,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:55,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:55,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:55,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:55,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:55,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 19:56:55,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:55,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:55,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:55,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 19:56:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:55,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756444621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:55,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:55,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:56:55,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359468210] [2021-07-13 19:56:55,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:55,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:55,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:55,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:55,703 INFO L87 Difference]: Start difference. First operand 7577 states and 33219 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:57,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:57,242 INFO L93 Difference]: Finished difference Result 9292 states and 38866 transitions. [2021-07-13 19:56:57,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:56:57,242 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:57,269 INFO L225 Difference]: With dead ends: 9292 [2021-07-13 19:56:57,269 INFO L226 Difference]: Without dead ends: 9252 [2021-07-13 19:56:57,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1296.9ms TimeCoverageRelationStatistics Valid=339, Invalid=1641, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:56:57,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9252 states. [2021-07-13 19:56:57,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9252 to 7572. [2021-07-13 19:56:57,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7572 states, 7571 states have (on average 4.385153876634527) internal successors, (33200), 7571 states have internal predecessors, (33200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:57,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7572 states to 7572 states and 33200 transitions. [2021-07-13 19:56:57,470 INFO L78 Accepts]: Start accepts. Automaton has 7572 states and 33200 transitions. Word has length 33 [2021-07-13 19:56:57,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:57,470 INFO L482 AbstractCegarLoop]: Abstraction has 7572 states and 33200 transitions. [2021-07-13 19:56:57,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:57,470 INFO L276 IsEmpty]: Start isEmpty. Operand 7572 states and 33200 transitions. [2021-07-13 19:56:57,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:57,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:57,485 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:57,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-07-13 19:56:57,685 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:57,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:57,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1603340618, now seen corresponding path program 95 times [2021-07-13 19:56:57,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:57,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943635541] [2021-07-13 19:56:57,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:57,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:57,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943635541] [2021-07-13 19:56:57,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943635541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:57,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834979971] [2021-07-13 19:56:57,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:57,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:56:57,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:57,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:57,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:58,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:58,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 19:56:58,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:58,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:58,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:58,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 19:56:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:58,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834979971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:58,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:58,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:56:58,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485890230] [2021-07-13 19:56:58,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:58,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:58,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:58,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:58,121 INFO L87 Difference]: Start difference. First operand 7572 states and 33200 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:00,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:00,149 INFO L93 Difference]: Finished difference Result 9207 states and 39437 transitions. [2021-07-13 19:57:00,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:57:00,149 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:00,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:00,175 INFO L225 Difference]: With dead ends: 9207 [2021-07-13 19:57:00,175 INFO L226 Difference]: Without dead ends: 9152 [2021-07-13 19:57:00,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1710.1ms TimeCoverageRelationStatistics Valid=499, Invalid=2581, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:57:00,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9152 states. [2021-07-13 19:57:00,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9152 to 7741. [2021-07-13 19:57:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7741 states, 7740 states have (on average 4.384625322997416) internal successors, (33937), 7740 states have internal predecessors, (33937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:00,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7741 states to 7741 states and 33937 transitions. [2021-07-13 19:57:00,327 INFO L78 Accepts]: Start accepts. Automaton has 7741 states and 33937 transitions. Word has length 33 [2021-07-13 19:57:00,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:00,327 INFO L482 AbstractCegarLoop]: Abstraction has 7741 states and 33937 transitions. [2021-07-13 19:57:00,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:00,327 INFO L276 IsEmpty]: Start isEmpty. Operand 7741 states and 33937 transitions. [2021-07-13 19:57:00,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:00,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:00,342 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:00,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-07-13 19:57:00,543 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:00,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:00,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1845651126, now seen corresponding path program 96 times [2021-07-13 19:57:00,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:00,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380451629] [2021-07-13 19:57:00,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:00,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:00,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380451629] [2021-07-13 19:57:00,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380451629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:00,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168663935] [2021-07-13 19:57:00,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:00,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:57:00,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:00,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 19:57:00,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:00,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:00,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:57:00,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:00,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:00,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:00,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-13 19:57:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:01,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168663935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:01,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:01,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:57:01,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781671121] [2021-07-13 19:57:01,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:57:01,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:01,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:57:01,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:57:01,030 INFO L87 Difference]: Start difference. First operand 7741 states and 33937 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:03,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:03,236 INFO L93 Difference]: Finished difference Result 9797 states and 40686 transitions. [2021-07-13 19:57:03,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 19:57:03,236 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:03,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:03,263 INFO L225 Difference]: With dead ends: 9797 [2021-07-13 19:57:03,264 INFO L226 Difference]: Without dead ends: 9736 [2021-07-13 19:57:03,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1823.8ms TimeCoverageRelationStatistics Valid=580, Invalid=3202, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 19:57:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9736 states. [2021-07-13 19:57:03,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9736 to 7682. [2021-07-13 19:57:03,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7682 states, 7681 states have (on average 4.3836740007811485) internal successors, (33671), 7681 states have internal predecessors, (33671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:03,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7682 states to 7682 states and 33671 transitions. [2021-07-13 19:57:03,432 INFO L78 Accepts]: Start accepts. Automaton has 7682 states and 33671 transitions. Word has length 33 [2021-07-13 19:57:03,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:03,432 INFO L482 AbstractCegarLoop]: Abstraction has 7682 states and 33671 transitions. [2021-07-13 19:57:03,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:03,432 INFO L276 IsEmpty]: Start isEmpty. Operand 7682 states and 33671 transitions. [2021-07-13 19:57:03,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:03,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:03,447 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:03,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-07-13 19:57:03,648 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:03,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:03,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1155064980, now seen corresponding path program 97 times [2021-07-13 19:57:03,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:03,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68854968] [2021-07-13 19:57:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:03,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:03,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68854968] [2021-07-13 19:57:03,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68854968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:03,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977015377] [2021-07-13 19:57:03,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:03,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:57:03,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:03,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:57:03,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:03,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:03,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:03,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 19:57:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:04,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977015377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:04,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:04,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:57:04,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347027293] [2021-07-13 19:57:04,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:57:04,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:04,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:57:04,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:04,017 INFO L87 Difference]: Start difference. First operand 7682 states and 33671 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:05,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:05,163 INFO L93 Difference]: Finished difference Result 8616 states and 37254 transitions. [2021-07-13 19:57:05,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:57:05,164 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:05,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:05,189 INFO L225 Difference]: With dead ends: 8616 [2021-07-13 19:57:05,189 INFO L226 Difference]: Without dead ends: 8534 [2021-07-13 19:57:05,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 974.8ms TimeCoverageRelationStatistics Valid=326, Invalid=1744, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:57:05,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8534 states. [2021-07-13 19:57:05,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8534 to 7667. [2021-07-13 19:57:05,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7667 states, 7666 states have (on average 4.385337855465693) internal successors, (33618), 7666 states have internal predecessors, (33618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:05,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7667 states to 7667 states and 33618 transitions. [2021-07-13 19:57:05,337 INFO L78 Accepts]: Start accepts. Automaton has 7667 states and 33618 transitions. Word has length 33 [2021-07-13 19:57:05,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:05,337 INFO L482 AbstractCegarLoop]: Abstraction has 7667 states and 33618 transitions. [2021-07-13 19:57:05,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:05,337 INFO L276 IsEmpty]: Start isEmpty. Operand 7667 states and 33618 transitions. [2021-07-13 19:57:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:05,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:05,352 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:05,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:05,553 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:05,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:05,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1025877224, now seen corresponding path program 98 times [2021-07-13 19:57:05,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:05,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947401211] [2021-07-13 19:57:05,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:05,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:05,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947401211] [2021-07-13 19:57:05,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947401211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:05,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468472707] [2021-07-13 19:57:05,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:05,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:05,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:05,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:57:05,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:05,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:05,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 19:57:05,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:05,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:05,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:05,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-13 19:57:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:06,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468472707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:06,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:06,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-13 19:57:06,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932434099] [2021-07-13 19:57:06,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:57:06,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:06,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:57:06,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:57:06,012 INFO L87 Difference]: Start difference. First operand 7667 states and 33618 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:07,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:07,560 INFO L93 Difference]: Finished difference Result 8621 states and 37208 transitions. [2021-07-13 19:57:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:57:07,560 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:07,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:07,585 INFO L225 Difference]: With dead ends: 8621 [2021-07-13 19:57:07,585 INFO L226 Difference]: Without dead ends: 8603 [2021-07-13 19:57:07,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1183.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1657, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:57:07,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8603 states. [2021-07-13 19:57:07,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8603 to 7667. [2021-07-13 19:57:07,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7667 states, 7666 states have (on average 4.384424732585442) internal successors, (33611), 7666 states have internal predecessors, (33611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:07,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7667 states to 7667 states and 33611 transitions. [2021-07-13 19:57:07,738 INFO L78 Accepts]: Start accepts. Automaton has 7667 states and 33611 transitions. Word has length 33 [2021-07-13 19:57:07,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:07,738 INFO L482 AbstractCegarLoop]: Abstraction has 7667 states and 33611 transitions. [2021-07-13 19:57:07,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:07,739 INFO L276 IsEmpty]: Start isEmpty. Operand 7667 states and 33611 transitions. [2021-07-13 19:57:07,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:07,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:07,754 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:07,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:07,954 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:07,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:07,954 INFO L82 PathProgramCache]: Analyzing trace with hash -256845854, now seen corresponding path program 99 times [2021-07-13 19:57:07,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:07,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282087006] [2021-07-13 19:57:07,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:08,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:08,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282087006] [2021-07-13 19:57:08,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282087006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:08,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045682645] [2021-07-13 19:57:08,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:08,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:57:08,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:08,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:57:08,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:08,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:08,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-07-13 19:57:08,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:08,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:08,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:08,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-07-13 19:57:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:08,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045682645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:08,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:08,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:57:08,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196907728] [2021-07-13 19:57:08,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:57:08,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:08,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:57:08,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:57:08,536 INFO L87 Difference]: Start difference. First operand 7667 states and 33611 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:08,808 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-07-13 19:57:11,470 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-07-13 19:57:11,852 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-07-13 19:57:12,005 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-07-13 19:57:12,142 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-07-13 19:57:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:12,596 INFO L93 Difference]: Finished difference Result 9336 states and 39712 transitions. [2021-07-13 19:57:12,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 19:57:12,596 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:12,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:12,623 INFO L225 Difference]: With dead ends: 9336 [2021-07-13 19:57:12,623 INFO L226 Difference]: Without dead ends: 9290 [2021-07-13 19:57:12,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 3371.4ms TimeCoverageRelationStatistics Valid=711, Invalid=4545, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 19:57:12,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9290 states. [2021-07-13 19:57:12,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9290 to 7730. [2021-07-13 19:57:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7730 states, 7729 states have (on average 4.3919006339759346) internal successors, (33945), 7729 states have internal predecessors, (33945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:12,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7730 states to 7730 states and 33945 transitions. [2021-07-13 19:57:12,778 INFO L78 Accepts]: Start accepts. Automaton has 7730 states and 33945 transitions. Word has length 33 [2021-07-13 19:57:12,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:12,778 INFO L482 AbstractCegarLoop]: Abstraction has 7730 states and 33945 transitions. [2021-07-13 19:57:12,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:12,778 INFO L276 IsEmpty]: Start isEmpty. Operand 7730 states and 33945 transitions. [2021-07-13 19:57:12,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:12,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:12,793 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:12,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:12,994 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:12,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:12,994 INFO L82 PathProgramCache]: Analyzing trace with hash 589129698, now seen corresponding path program 100 times [2021-07-13 19:57:12,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:12,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420296261] [2021-07-13 19:57:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:13,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:13,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420296261] [2021-07-13 19:57:13,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420296261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:13,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928963132] [2021-07-13 19:57:13,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:13,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:13,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:13,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:57:13,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:13,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:13,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 19:57:13,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:13,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:13,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:13,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 19:57:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:13,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928963132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:13,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:13,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:57:13,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400492088] [2021-07-13 19:57:13,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:57:13,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:13,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:57:13,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:13,413 INFO L87 Difference]: Start difference. First operand 7730 states and 33945 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:16,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:16,518 INFO L93 Difference]: Finished difference Result 10667 states and 43851 transitions. [2021-07-13 19:57:16,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 19:57:16,519 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:16,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:16,547 INFO L225 Difference]: With dead ends: 10667 [2021-07-13 19:57:16,547 INFO L226 Difference]: Without dead ends: 10547 [2021-07-13 19:57:16,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 2588.9ms TimeCoverageRelationStatistics Valid=795, Invalid=4461, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 19:57:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10547 states. [2021-07-13 19:57:16,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10547 to 7726. [2021-07-13 19:57:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7726 states, 7725 states have (on average 4.386407766990291) internal successors, (33885), 7725 states have internal predecessors, (33885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7726 states to 7726 states and 33885 transitions. [2021-07-13 19:57:16,718 INFO L78 Accepts]: Start accepts. Automaton has 7726 states and 33885 transitions. Word has length 33 [2021-07-13 19:57:16,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:16,718 INFO L482 AbstractCegarLoop]: Abstraction has 7726 states and 33885 transitions. [2021-07-13 19:57:16,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:16,718 INFO L276 IsEmpty]: Start isEmpty. Operand 7726 states and 33885 transitions. [2021-07-13 19:57:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:16,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:16,734 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:16,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-07-13 19:57:16,937 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:16,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:16,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1076346498, now seen corresponding path program 101 times [2021-07-13 19:57:16,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:16,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136130519] [2021-07-13 19:57:16,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:17,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:17,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136130519] [2021-07-13 19:57:17,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136130519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:17,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771281816] [2021-07-13 19:57:17,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:17,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:57:17,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:17,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:57:17,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:17,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:17,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 19:57:17,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:17,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:17,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:17,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 19:57:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:17,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771281816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:17,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:17,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:57:17,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482158433] [2021-07-13 19:57:17,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:57:17,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:17,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:57:17,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:17,345 INFO L87 Difference]: Start difference. First operand 7726 states and 33885 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:18,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:18,299 INFO L93 Difference]: Finished difference Result 8767 states and 37810 transitions. [2021-07-13 19:57:18,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:57:18,299 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:18,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:18,325 INFO L225 Difference]: With dead ends: 8767 [2021-07-13 19:57:18,325 INFO L226 Difference]: Without dead ends: 8729 [2021-07-13 19:57:18,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 776.1ms TimeCoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:57:18,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8729 states. [2021-07-13 19:57:18,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8729 to 7718. [2021-07-13 19:57:18,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7718 states, 7717 states have (on average 4.386030841000388) internal successors, (33847), 7717 states have internal predecessors, (33847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:18,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7718 states to 7718 states and 33847 transitions. [2021-07-13 19:57:18,483 INFO L78 Accepts]: Start accepts. Automaton has 7718 states and 33847 transitions. Word has length 33 [2021-07-13 19:57:18,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:18,483 INFO L482 AbstractCegarLoop]: Abstraction has 7718 states and 33847 transitions. [2021-07-13 19:57:18,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:18,483 INFO L276 IsEmpty]: Start isEmpty. Operand 7718 states and 33847 transitions. [2021-07-13 19:57:18,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:18,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:18,500 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:18,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-07-13 19:57:18,700 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:18,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:18,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1968484332, now seen corresponding path program 102 times [2021-07-13 19:57:18,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:18,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874107236] [2021-07-13 19:57:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:18,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:18,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874107236] [2021-07-13 19:57:18,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874107236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:18,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132196853] [2021-07-13 19:57:18,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:18,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:57:18,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:18,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:57:18,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:19,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:19,090 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:57:19,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-07-13 19:57:19,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:57:19,120 INFO L628 ElimStorePlain]: treesize reduction 65, result has 25.3 percent of original size [2021-07-13 19:57:19,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:19,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-13 19:57:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:19,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132196853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:19,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:19,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:57:19,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779718593] [2021-07-13 19:57:19,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:57:19,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:19,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:57:19,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:57:19,221 INFO L87 Difference]: Start difference. First operand 7718 states and 33847 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:20,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:20,488 INFO L93 Difference]: Finished difference Result 8402 states and 36509 transitions. [2021-07-13 19:57:20,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:57:20,489 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:20,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:20,514 INFO L225 Difference]: With dead ends: 8402 [2021-07-13 19:57:20,514 INFO L226 Difference]: Without dead ends: 8351 [2021-07-13 19:57:20,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1103.0ms TimeCoverageRelationStatistics Valid=216, Invalid=1946, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:57:20,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8351 states. [2021-07-13 19:57:20,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8351 to 7705. [2021-07-13 19:57:20,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7705 states, 7704 states have (on average 4.38785046728972) internal successors, (33804), 7704 states have internal predecessors, (33804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:20,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7705 states to 7705 states and 33804 transitions. [2021-07-13 19:57:20,670 INFO L78 Accepts]: Start accepts. Automaton has 7705 states and 33804 transitions. Word has length 33 [2021-07-13 19:57:20,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:20,670 INFO L482 AbstractCegarLoop]: Abstraction has 7705 states and 33804 transitions. [2021-07-13 19:57:20,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:20,670 INFO L276 IsEmpty]: Start isEmpty. Operand 7705 states and 33804 transitions. [2021-07-13 19:57:20,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:20,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:20,685 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:20,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:20,886 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:20,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:20,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1061234016, now seen corresponding path program 103 times [2021-07-13 19:57:20,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:20,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550309703] [2021-07-13 19:57:20,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:21,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:21,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550309703] [2021-07-13 19:57:21,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550309703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:21,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098772513] [2021-07-13 19:57:21,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:21,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:57:21,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:21,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:21,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 19:57:21,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:21,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:21,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:21,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 19:57:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:21,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098772513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:21,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:21,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:57:21,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073647651] [2021-07-13 19:57:21,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:57:21,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:21,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:57:21,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:21,266 INFO L87 Difference]: Start difference. First operand 7705 states and 33804 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:22,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:22,328 INFO L93 Difference]: Finished difference Result 8712 states and 37551 transitions. [2021-07-13 19:57:22,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:57:22,328 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:22,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:22,354 INFO L225 Difference]: With dead ends: 8712 [2021-07-13 19:57:22,354 INFO L226 Difference]: Without dead ends: 8684 [2021-07-13 19:57:22,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 817.5ms TimeCoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:57:22,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8684 states. [2021-07-13 19:57:22,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8684 to 7845. [2021-07-13 19:57:22,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7845 states, 7844 states have (on average 4.386664966853646) internal successors, (34409), 7844 states have internal predecessors, (34409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:22,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7845 states to 7845 states and 34409 transitions. [2021-07-13 19:57:22,523 INFO L78 Accepts]: Start accepts. Automaton has 7845 states and 34409 transitions. Word has length 33 [2021-07-13 19:57:22,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:22,523 INFO L482 AbstractCegarLoop]: Abstraction has 7845 states and 34409 transitions. [2021-07-13 19:57:22,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:22,523 INFO L276 IsEmpty]: Start isEmpty. Operand 7845 states and 34409 transitions. [2021-07-13 19:57:22,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:22,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:22,538 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:22,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-07-13 19:57:22,739 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:22,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:22,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1830265386, now seen corresponding path program 104 times [2021-07-13 19:57:22,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:22,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347446821] [2021-07-13 19:57:22,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:22,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:22,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347446821] [2021-07-13 19:57:22,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347446821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:22,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32212209] [2021-07-13 19:57:22,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:22,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:22,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:22,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:57:22,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:23,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:23,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 19:57:23,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:23,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:23,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:23,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 19:57:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:23,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32212209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:23,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:23,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:57:23,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774104350] [2021-07-13 19:57:23,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:57:23,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:23,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:57:23,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:57:23,322 INFO L87 Difference]: Start difference. First operand 7845 states and 34409 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:23,455 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-07-13 19:57:23,634 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-07-13 19:57:24,379 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-07-13 19:57:25,001 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-07-13 19:57:27,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:27,210 INFO L93 Difference]: Finished difference Result 9616 states and 40927 transitions. [2021-07-13 19:57:27,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 19:57:27,210 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:27,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:27,239 INFO L225 Difference]: With dead ends: 9616 [2021-07-13 19:57:27,240 INFO L226 Difference]: Without dead ends: 9570 [2021-07-13 19:57:27,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 3418.6ms TimeCoverageRelationStatistics Valid=613, Invalid=4217, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 19:57:27,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9570 states. [2021-07-13 19:57:27,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9570 to 7845. [2021-07-13 19:57:27,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7845 states, 7844 states have (on average 4.386664966853646) internal successors, (34409), 7844 states have internal predecessors, (34409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:27,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7845 states to 7845 states and 34409 transitions. [2021-07-13 19:57:27,437 INFO L78 Accepts]: Start accepts. Automaton has 7845 states and 34409 transitions. Word has length 33 [2021-07-13 19:57:27,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:27,437 INFO L482 AbstractCegarLoop]: Abstraction has 7845 states and 34409 transitions. [2021-07-13 19:57:27,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:27,437 INFO L276 IsEmpty]: Start isEmpty. Operand 7845 states and 34409 transitions. [2021-07-13 19:57:27,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:27,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:27,452 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:27,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:27,653 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:27,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:27,653 INFO L82 PathProgramCache]: Analyzing trace with hash 49667084, now seen corresponding path program 105 times [2021-07-13 19:57:27,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:27,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168623773] [2021-07-13 19:57:27,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:27,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:27,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168623773] [2021-07-13 19:57:27,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168623773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:27,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203320707] [2021-07-13 19:57:27,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:27,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:57:27,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:27,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 19:57:27,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:28,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:28,031 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:57:28,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 19:57:28,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:28,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:28,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:28,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-07-13 19:57:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:28,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203320707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:28,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:28,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:57:28,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145182638] [2021-07-13 19:57:28,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:57:28,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:28,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:57:28,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:57:28,203 INFO L87 Difference]: Start difference. First operand 7845 states and 34409 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:30,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:30,196 INFO L93 Difference]: Finished difference Result 8881 states and 38180 transitions. [2021-07-13 19:57:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:57:30,197 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:30,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:30,221 INFO L225 Difference]: With dead ends: 8881 [2021-07-13 19:57:30,221 INFO L226 Difference]: Without dead ends: 8822 [2021-07-13 19:57:30,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1545.9ms TimeCoverageRelationStatistics Valid=417, Invalid=2663, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:57:30,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8822 states. [2021-07-13 19:57:30,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8822 to 7909. [2021-07-13 19:57:30,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7909 states, 7908 states have (on average 4.387961557916034) internal successors, (34700), 7908 states have internal predecessors, (34700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7909 states to 7909 states and 34700 transitions. [2021-07-13 19:57:30,382 INFO L78 Accepts]: Start accepts. Automaton has 7909 states and 34700 transitions. Word has length 33 [2021-07-13 19:57:30,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:30,382 INFO L482 AbstractCegarLoop]: Abstraction has 7909 states and 34700 transitions. [2021-07-13 19:57:30,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 7909 states and 34700 transitions. [2021-07-13 19:57:30,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:30,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:30,398 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:30,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:30,598 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:30,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:30,598 INFO L82 PathProgramCache]: Analyzing trace with hash 444102738, now seen corresponding path program 106 times [2021-07-13 19:57:30,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:30,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995884981] [2021-07-13 19:57:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:30,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:30,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995884981] [2021-07-13 19:57:30,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995884981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:30,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502198591] [2021-07-13 19:57:30,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:30,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:30,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:30,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:57:30,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:30,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:30,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 19:57:30,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:30,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:30,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:30,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 19:57:31,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:31,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502198591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:31,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:31,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:57:31,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101634576] [2021-07-13 19:57:31,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:57:31,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:31,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:57:31,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:57:31,025 INFO L87 Difference]: Start difference. First operand 7909 states and 34700 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:32,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:32,908 INFO L93 Difference]: Finished difference Result 9483 states and 40098 transitions. [2021-07-13 19:57:32,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:57:32,908 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:32,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:32,936 INFO L225 Difference]: With dead ends: 9483 [2021-07-13 19:57:32,936 INFO L226 Difference]: Without dead ends: 9454 [2021-07-13 19:57:32,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1414.4ms TimeCoverageRelationStatistics Valid=284, Invalid=2266, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:57:32,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9454 states. [2021-07-13 19:57:33,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9454 to 7909. [2021-07-13 19:57:33,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7909 states, 7908 states have (on average 4.387961557916034) internal successors, (34700), 7908 states have internal predecessors, (34700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7909 states to 7909 states and 34700 transitions. [2021-07-13 19:57:33,103 INFO L78 Accepts]: Start accepts. Automaton has 7909 states and 34700 transitions. Word has length 33 [2021-07-13 19:57:33,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:33,104 INFO L482 AbstractCegarLoop]: Abstraction has 7909 states and 34700 transitions. [2021-07-13 19:57:33,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand 7909 states and 34700 transitions. [2021-07-13 19:57:33,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:33,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:33,119 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:33,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-07-13 19:57:33,320 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:33,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:33,320 INFO L82 PathProgramCache]: Analyzing trace with hash 90963248, now seen corresponding path program 107 times [2021-07-13 19:57:33,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:33,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305171972] [2021-07-13 19:57:33,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:33,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:33,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305171972] [2021-07-13 19:57:33,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305171972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:33,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020101273] [2021-07-13 19:57:33,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:33,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:57:33,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:33,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 19:57:33,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:33,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:33,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 19:57:33,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:33,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:33,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:33,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:18 [2021-07-13 19:57:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:33,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020101273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:33,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:33,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 19:57:33,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497802294] [2021-07-13 19:57:33,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:57:33,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:33,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:57:33,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:57:33,836 INFO L87 Difference]: Start difference. First operand 7909 states and 34700 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:35,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:35,792 INFO L93 Difference]: Finished difference Result 8859 states and 38382 transitions. [2021-07-13 19:57:35,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:57:35,792 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:35,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:35,818 INFO L225 Difference]: With dead ends: 8859 [2021-07-13 19:57:35,818 INFO L226 Difference]: Without dead ends: 8793 [2021-07-13 19:57:35,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 1668.3ms TimeCoverageRelationStatistics Valid=372, Invalid=2708, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:57:35,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8793 states. [2021-07-13 19:57:35,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8793 to 7900. [2021-07-13 19:57:35,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 7899 states have (on average 4.388656791998987) internal successors, (34666), 7899 states have internal predecessors, (34666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:35,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 34666 transitions. [2021-07-13 19:57:35,970 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 34666 transitions. Word has length 33 [2021-07-13 19:57:35,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:35,970 INFO L482 AbstractCegarLoop]: Abstraction has 7900 states and 34666 transitions. [2021-07-13 19:57:35,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:35,971 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 34666 transitions. [2021-07-13 19:57:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:35,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:35,986 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:36,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:36,186 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:36,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:36,186 INFO L82 PathProgramCache]: Analyzing trace with hash -200759130, now seen corresponding path program 108 times [2021-07-13 19:57:36,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:36,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71944853] [2021-07-13 19:57:36,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:36,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:36,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71944853] [2021-07-13 19:57:36,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71944853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:36,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478198988] [2021-07-13 19:57:36,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:36,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:57:36,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:36,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 19:57:36,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:36,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:36,608 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:57:36,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 19:57:36,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:36,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:36,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:36,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-07-13 19:57:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:36,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478198988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:36,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:36,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:57:36,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573460888] [2021-07-13 19:57:36,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:57:36,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:36,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:57:36,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:57:36,816 INFO L87 Difference]: Start difference. First operand 7900 states and 34666 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:39,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:39,059 INFO L93 Difference]: Finished difference Result 8775 states and 37916 transitions. [2021-07-13 19:57:39,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 19:57:39,060 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:39,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:39,085 INFO L225 Difference]: With dead ends: 8775 [2021-07-13 19:57:39,085 INFO L226 Difference]: Without dead ends: 8729 [2021-07-13 19:57:39,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1802.1ms TimeCoverageRelationStatistics Valid=401, Invalid=2791, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 19:57:39,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8729 states. [2021-07-13 19:57:39,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8729 to 7958. [2021-07-13 19:57:39,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7958 states, 7957 states have (on average 4.392861631268066) internal successors, (34954), 7957 states have internal predecessors, (34954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:39,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7958 states to 7958 states and 34954 transitions. [2021-07-13 19:57:39,244 INFO L78 Accepts]: Start accepts. Automaton has 7958 states and 34954 transitions. Word has length 33 [2021-07-13 19:57:39,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:39,244 INFO L482 AbstractCegarLoop]: Abstraction has 7958 states and 34954 transitions. [2021-07-13 19:57:39,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:39,244 INFO L276 IsEmpty]: Start isEmpty. Operand 7958 states and 34954 transitions. [2021-07-13 19:57:39,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:39,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:39,260 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:39,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-07-13 19:57:39,460 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:39,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:39,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1981357432, now seen corresponding path program 109 times [2021-07-13 19:57:39,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:39,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917864300] [2021-07-13 19:57:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:39,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:39,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917864300] [2021-07-13 19:57:39,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917864300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:39,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813921694] [2021-07-13 19:57:39,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:39,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:57:39,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:39,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:39,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 19:57:39,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:39,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:39,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:39,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 19:57:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:39,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813921694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:39,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:39,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:57:39,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770840993] [2021-07-13 19:57:39,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:57:39,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:39,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:57:39,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:57:39,977 INFO L87 Difference]: Start difference. First operand 7958 states and 34954 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:41,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:41,773 INFO L93 Difference]: Finished difference Result 9067 states and 39098 transitions. [2021-07-13 19:57:41,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 19:57:41,774 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:41,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:41,800 INFO L225 Difference]: With dead ends: 9067 [2021-07-13 19:57:41,800 INFO L226 Difference]: Without dead ends: 9040 [2021-07-13 19:57:41,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1559.8ms TimeCoverageRelationStatistics Valid=512, Invalid=3028, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 19:57:41,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9040 states. [2021-07-13 19:57:41,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9040 to 7949. [2021-07-13 19:57:41,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7949 states, 7948 states have (on average 4.393432310015098) internal successors, (34919), 7948 states have internal predecessors, (34919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:41,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7949 states to 7949 states and 34919 transitions. [2021-07-13 19:57:41,990 INFO L78 Accepts]: Start accepts. Automaton has 7949 states and 34919 transitions. Word has length 33 [2021-07-13 19:57:41,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:41,990 INFO L482 AbstractCegarLoop]: Abstraction has 7949 states and 34919 transitions. [2021-07-13 19:57:41,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:41,990 INFO L276 IsEmpty]: Start isEmpty. Operand 7949 states and 34919 transitions. [2021-07-13 19:57:42,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:42,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:42,007 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:42,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:42,207 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:42,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:42,208 INFO L82 PathProgramCache]: Analyzing trace with hash 645216422, now seen corresponding path program 110 times [2021-07-13 19:57:42,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:42,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674802651] [2021-07-13 19:57:42,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:42,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:42,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674802651] [2021-07-13 19:57:42,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674802651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:42,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130054850] [2021-07-13 19:57:42,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:42,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:42,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:42,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:57:42,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:42,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:42,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 19:57:42,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:42,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:42,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:42,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 19:57:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:42,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130054850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:42,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:42,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:57:42,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367039111] [2021-07-13 19:57:42,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:57:42,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:42,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:57:42,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:57:42,745 INFO L87 Difference]: Start difference. First operand 7949 states and 34919 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:43,008 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-07-13 19:57:44,130 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-07-13 19:57:46,563 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-13 19:57:46,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:46,733 INFO L93 Difference]: Finished difference Result 10534 states and 43766 transitions. [2021-07-13 19:57:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 19:57:46,733 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:46,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:46,763 INFO L225 Difference]: With dead ends: 10534 [2021-07-13 19:57:46,763 INFO L226 Difference]: Without dead ends: 10465 [2021-07-13 19:57:46,764 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 3296.4ms TimeCoverageRelationStatistics Valid=777, Invalid=5385, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 19:57:46,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10465 states. [2021-07-13 19:57:46,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10465 to 7942. [2021-07-13 19:57:46,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7942 states, 7941 states have (on average 4.390882760357638) internal successors, (34868), 7941 states have internal predecessors, (34868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:46,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7942 states to 7942 states and 34868 transitions. [2021-07-13 19:57:46,995 INFO L78 Accepts]: Start accepts. Automaton has 7942 states and 34868 transitions. Word has length 33 [2021-07-13 19:57:46,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:46,995 INFO L482 AbstractCegarLoop]: Abstraction has 7942 states and 34868 transitions. [2021-07-13 19:57:46,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:46,996 INFO L276 IsEmpty]: Start isEmpty. Operand 7942 states and 34868 transitions. [2021-07-13 19:57:47,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:47,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:47,011 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:47,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-07-13 19:57:47,211 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:47,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:47,212 INFO L82 PathProgramCache]: Analyzing trace with hash -649034768, now seen corresponding path program 111 times [2021-07-13 19:57:47,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:47,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351228968] [2021-07-13 19:57:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:47,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:47,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:47,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351228968] [2021-07-13 19:57:47,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351228968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:47,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199857013] [2021-07-13 19:57:47,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:47,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:57:47,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:47,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:57:47,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:47,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:47,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 19:57:47,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:47,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:47,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:47,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 19:57:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:47,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199857013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:47,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:47,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:57:47,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661449245] [2021-07-13 19:57:47,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:57:47,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:47,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:57:47,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:57:47,695 INFO L87 Difference]: Start difference. First operand 7942 states and 34868 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:47,850 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-07-13 19:57:48,423 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-07-13 19:57:49,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:49,551 INFO L93 Difference]: Finished difference Result 8622 states and 37529 transitions. [2021-07-13 19:57:49,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:57:49,551 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:49,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:49,580 INFO L225 Difference]: With dead ends: 8622 [2021-07-13 19:57:49,580 INFO L226 Difference]: Without dead ends: 8591 [2021-07-13 19:57:49,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1542.3ms TimeCoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:57:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8591 states. [2021-07-13 19:57:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8591 to 7942. [2021-07-13 19:57:49,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7942 states, 7941 states have (on average 4.390882760357638) internal successors, (34868), 7941 states have internal predecessors, (34868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:49,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7942 states to 7942 states and 34868 transitions. [2021-07-13 19:57:49,730 INFO L78 Accepts]: Start accepts. Automaton has 7942 states and 34868 transitions. Word has length 33 [2021-07-13 19:57:49,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:49,730 INFO L482 AbstractCegarLoop]: Abstraction has 7942 states and 34868 transitions. [2021-07-13 19:57:49,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:49,730 INFO L276 IsEmpty]: Start isEmpty. Operand 7942 states and 34868 transitions. [2021-07-13 19:57:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:49,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:49,746 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:49,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-07-13 19:57:49,947 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:49,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:49,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1606314080, now seen corresponding path program 112 times [2021-07-13 19:57:49,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:49,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996315718] [2021-07-13 19:57:49,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:49,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:50,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:50,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996315718] [2021-07-13 19:57:50,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996315718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:50,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942587721] [2021-07-13 19:57:50,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:50,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:50,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:50,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:57:50,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:50,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:57:50,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:50,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:50,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:50,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 19:57:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:50,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942587721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:50,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:50,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:57:50,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203431671] [2021-07-13 19:57:50,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:57:50,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:50,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:57:50,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:50,323 INFO L87 Difference]: Start difference. First operand 7942 states and 34868 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:51,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:51,275 INFO L93 Difference]: Finished difference Result 8596 states and 37325 transitions. [2021-07-13 19:57:51,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:57:51,275 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:51,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:51,301 INFO L225 Difference]: With dead ends: 8596 [2021-07-13 19:57:51,301 INFO L226 Difference]: Without dead ends: 8556 [2021-07-13 19:57:51,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 846.6ms TimeCoverageRelationStatistics Valid=322, Invalid=1748, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:57:51,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8556 states. [2021-07-13 19:57:51,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8556 to 7930. [2021-07-13 19:57:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7930 states, 7929 states have (on average 4.392483289191575) internal successors, (34828), 7929 states have internal predecessors, (34828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:51,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7930 states to 7930 states and 34828 transitions. [2021-07-13 19:57:51,450 INFO L78 Accepts]: Start accepts. Automaton has 7930 states and 34828 transitions. Word has length 33 [2021-07-13 19:57:51,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:51,450 INFO L482 AbstractCegarLoop]: Abstraction has 7930 states and 34828 transitions. [2021-07-13 19:57:51,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:51,450 INFO L276 IsEmpty]: Start isEmpty. Operand 7930 states and 34828 transitions. [2021-07-13 19:57:51,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:51,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:51,523 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:51,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:51,723 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:51,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:51,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1464990324, now seen corresponding path program 113 times [2021-07-13 19:57:51,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:51,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791121422] [2021-07-13 19:57:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:51,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:51,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791121422] [2021-07-13 19:57:51,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791121422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:51,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327010851] [2021-07-13 19:57:51,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:51,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:57:51,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:51,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:57:51,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:52,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:52,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 19:57:52,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:52,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:52,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:52,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 19:57:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:52,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327010851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:52,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:52,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:57:52,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409184456] [2021-07-13 19:57:52,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:57:52,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:52,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:57:52,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:52,126 INFO L87 Difference]: Start difference. First operand 7930 states and 34828 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:53,165 INFO L93 Difference]: Finished difference Result 9367 states and 40126 transitions. [2021-07-13 19:57:53,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:57:53,166 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:53,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:53,192 INFO L225 Difference]: With dead ends: 9367 [2021-07-13 19:57:53,192 INFO L226 Difference]: Without dead ends: 9318 [2021-07-13 19:57:53,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 749.1ms TimeCoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:57:53,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9318 states. [2021-07-13 19:57:53,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9318 to 8127. [2021-07-13 19:57:53,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8127 states, 8126 states have (on average 4.393920748215605) internal successors, (35705), 8126 states have internal predecessors, (35705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:53,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8127 states to 8127 states and 35705 transitions. [2021-07-13 19:57:53,355 INFO L78 Accepts]: Start accepts. Automaton has 8127 states and 35705 transitions. Word has length 33 [2021-07-13 19:57:53,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:53,356 INFO L482 AbstractCegarLoop]: Abstraction has 8127 states and 35705 transitions. [2021-07-13 19:57:53,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:53,356 INFO L276 IsEmpty]: Start isEmpty. Operand 8127 states and 35705 transitions. [2021-07-13 19:57:53,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:53,371 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:53,371 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:53,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-07-13 19:57:53,572 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:53,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:53,573 INFO L82 PathProgramCache]: Analyzing trace with hash -2060945602, now seen corresponding path program 114 times [2021-07-13 19:57:53,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:53,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013388337] [2021-07-13 19:57:53,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:53,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:53,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013388337] [2021-07-13 19:57:53,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013388337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:53,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100258793] [2021-07-13 19:57:53,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:53,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:57:53,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:53,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:57:53,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:54,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:54,035 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:57:54,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-07-13 19:57:54,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:57:54,067 INFO L628 ElimStorePlain]: treesize reduction 84, result has 20.8 percent of original size [2021-07-13 19:57:54,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:54,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-13 19:57:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:54,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100258793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:54,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:54,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:57:54,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851383550] [2021-07-13 19:57:54,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:57:54,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:54,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:57:54,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:57:54,187 INFO L87 Difference]: Start difference. First operand 8127 states and 35705 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:56,511 INFO L93 Difference]: Finished difference Result 9160 states and 39451 transitions. [2021-07-13 19:57:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 19:57:56,512 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:56,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:56,537 INFO L225 Difference]: With dead ends: 9160 [2021-07-13 19:57:56,537 INFO L226 Difference]: Without dead ends: 9114 [2021-07-13 19:57:56,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 1989.0ms TimeCoverageRelationStatistics Valid=468, Invalid=3438, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 19:57:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9114 states. [2021-07-13 19:57:56,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9114 to 8127. [2021-07-13 19:57:56,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8127 states, 8126 states have (on average 4.393920748215605) internal successors, (35705), 8126 states have internal predecessors, (35705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8127 states to 8127 states and 35705 transitions. [2021-07-13 19:57:56,728 INFO L78 Accepts]: Start accepts. Automaton has 8127 states and 35705 transitions. Word has length 33 [2021-07-13 19:57:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:56,728 INFO L482 AbstractCegarLoop]: Abstraction has 8127 states and 35705 transitions. [2021-07-13 19:57:56,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 8127 states and 35705 transitions. [2021-07-13 19:57:56,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:56,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:56,745 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:56,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:56,947 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:56,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:56,947 INFO L82 PathProgramCache]: Analyzing trace with hash 453423392, now seen corresponding path program 115 times [2021-07-13 19:57:56,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:56,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367661585] [2021-07-13 19:57:56,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:57,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:57,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367661585] [2021-07-13 19:57:57,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367661585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:57,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358216679] [2021-07-13 19:57:57,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:57,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:57:57,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:57,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:57:57,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:57,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:57,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:57,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-13 19:57:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:57,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358216679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:57,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:57,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:57:57,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815056308] [2021-07-13 19:57:57,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:57:57,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:57,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:57:57,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:57:57,373 INFO L87 Difference]: Start difference. First operand 8127 states and 35705 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:59,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:59,594 INFO L93 Difference]: Finished difference Result 9795 states and 41927 transitions. [2021-07-13 19:57:59,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 19:57:59,594 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:57:59,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:59,622 INFO L225 Difference]: With dead ends: 9795 [2021-07-13 19:57:59,622 INFO L226 Difference]: Without dead ends: 9700 [2021-07-13 19:57:59,623 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 1735.9ms TimeCoverageRelationStatistics Valid=570, Invalid=3590, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 19:57:59,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9700 states. [2021-07-13 19:57:59,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9700 to 8026. [2021-07-13 19:57:59,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8026 states, 8025 states have (on average 4.3966355140186915) internal successors, (35283), 8025 states have internal predecessors, (35283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:59,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8026 states to 8026 states and 35283 transitions. [2021-07-13 19:57:59,781 INFO L78 Accepts]: Start accepts. Automaton has 8026 states and 35283 transitions. Word has length 33 [2021-07-13 19:57:59,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:59,781 INFO L482 AbstractCegarLoop]: Abstraction has 8026 states and 35283 transitions. [2021-07-13 19:57:59,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:59,781 INFO L276 IsEmpty]: Start isEmpty. Operand 8026 states and 35283 transitions. [2021-07-13 19:57:59,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:57:59,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:59,796 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:00,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-07-13 19:58:00,012 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:00,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:00,012 INFO L82 PathProgramCache]: Analyzing trace with hash 522383216, now seen corresponding path program 116 times [2021-07-13 19:58:00,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:00,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415002283] [2021-07-13 19:58:00,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:00,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:00,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415002283] [2021-07-13 19:58:00,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415002283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:00,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713874682] [2021-07-13 19:58:00,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:00,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:00,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:00,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:00,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:00,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:00,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 19:58:00,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:00,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:00,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:00,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-13 19:58:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:00,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713874682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:00,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:00,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:58:00,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202096160] [2021-07-13 19:58:00,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:58:00,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:00,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:58:00,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:58:00,537 INFO L87 Difference]: Start difference. First operand 8026 states and 35283 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:02,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:02,151 INFO L93 Difference]: Finished difference Result 8972 states and 39173 transitions. [2021-07-13 19:58:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:58:02,151 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:02,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:02,180 INFO L225 Difference]: With dead ends: 8972 [2021-07-13 19:58:02,180 INFO L226 Difference]: Without dead ends: 8921 [2021-07-13 19:58:02,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1306.7ms TimeCoverageRelationStatistics Valid=262, Invalid=1900, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:58:02,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8921 states. [2021-07-13 19:58:02,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8921 to 8008. [2021-07-13 19:58:02,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8008 states, 8007 states have (on average 4.39865118021731) internal successors, (35220), 8007 states have internal predecessors, (35220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:02,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8008 states to 8008 states and 35220 transitions. [2021-07-13 19:58:02,342 INFO L78 Accepts]: Start accepts. Automaton has 8008 states and 35220 transitions. Word has length 33 [2021-07-13 19:58:02,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:02,342 INFO L482 AbstractCegarLoop]: Abstraction has 8008 states and 35220 transitions. [2021-07-13 19:58:02,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:02,342 INFO L276 IsEmpty]: Start isEmpty. Operand 8008 states and 35220 transitions. [2021-07-13 19:58:02,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:02,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:02,358 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:02,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-07-13 19:58:02,558 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:02,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:02,559 INFO L82 PathProgramCache]: Analyzing trace with hash -518815942, now seen corresponding path program 117 times [2021-07-13 19:58:02,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:02,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377273237] [2021-07-13 19:58:02,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:02,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:02,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377273237] [2021-07-13 19:58:02,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377273237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:02,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599881383] [2021-07-13 19:58:02,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:02,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:58:02,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:02,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:02,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:02,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:02,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-07-13 19:58:02,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:02,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:02,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:02,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-07-13 19:58:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:03,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599881383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:03,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:03,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:58:03,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305511646] [2021-07-13 19:58:03,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:58:03,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:03,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:58:03,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:58:03,045 INFO L87 Difference]: Start difference. First operand 8008 states and 35220 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:04,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:04,522 INFO L93 Difference]: Finished difference Result 8710 states and 37808 transitions. [2021-07-13 19:58:04,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:58:04,523 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:04,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:04,549 INFO L225 Difference]: With dead ends: 8710 [2021-07-13 19:58:04,550 INFO L226 Difference]: Without dead ends: 8692 [2021-07-13 19:58:04,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1151.5ms TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:58:04,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8692 states. [2021-07-13 19:58:04,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8692 to 8001. [2021-07-13 19:58:04,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8001 states, 8000 states have (on average 4.400125) internal successors, (35201), 8000 states have internal predecessors, (35201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:04,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8001 states to 8001 states and 35201 transitions. [2021-07-13 19:58:04,709 INFO L78 Accepts]: Start accepts. Automaton has 8001 states and 35201 transitions. Word has length 33 [2021-07-13 19:58:04,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:04,709 INFO L482 AbstractCegarLoop]: Abstraction has 8001 states and 35201 transitions. [2021-07-13 19:58:04,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:04,709 INFO L276 IsEmpty]: Start isEmpty. Operand 8001 states and 35201 transitions. [2021-07-13 19:58:04,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:04,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:04,725 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:04,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-07-13 19:58:04,925 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:04,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:04,925 INFO L82 PathProgramCache]: Analyzing trace with hash 250215428, now seen corresponding path program 118 times [2021-07-13 19:58:04,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:04,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900016178] [2021-07-13 19:58:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:05,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:05,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900016178] [2021-07-13 19:58:05,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900016178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:05,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871434646] [2021-07-13 19:58:05,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:05,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:05,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:05,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:05,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:05,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:05,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 19:58:05,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:05,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:05,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:05,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 19:58:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:05,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871434646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:05,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:05,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:58:05,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302580589] [2021-07-13 19:58:05,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:58:05,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:05,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:58:05,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:58:05,386 INFO L87 Difference]: Start difference. First operand 8001 states and 35201 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:08,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:08,519 INFO L93 Difference]: Finished difference Result 9546 states and 41268 transitions. [2021-07-13 19:58:08,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 19:58:08,520 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:08,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:08,547 INFO L225 Difference]: With dead ends: 9546 [2021-07-13 19:58:08,547 INFO L226 Difference]: Without dead ends: 9514 [2021-07-13 19:58:08,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2582.5ms TimeCoverageRelationStatistics Valid=658, Invalid=4312, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 19:58:08,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9514 states. [2021-07-13 19:58:08,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9514 to 8001. [2021-07-13 19:58:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8001 states, 8000 states have (on average 4.400125) internal successors, (35201), 8000 states have internal predecessors, (35201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:08,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8001 states to 8001 states and 35201 transitions. [2021-07-13 19:58:08,775 INFO L78 Accepts]: Start accepts. Automaton has 8001 states and 35201 transitions. Word has length 33 [2021-07-13 19:58:08,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:08,776 INFO L482 AbstractCegarLoop]: Abstraction has 8001 states and 35201 transitions. [2021-07-13 19:58:08,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:08,776 INFO L276 IsEmpty]: Start isEmpty. Operand 8001 states and 35201 transitions. [2021-07-13 19:58:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:08,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:08,794 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:08,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-07-13 19:58:08,995 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:08,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:08,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1096190980, now seen corresponding path program 119 times [2021-07-13 19:58:08,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:08,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353617005] [2021-07-13 19:58:08,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:09,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:09,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353617005] [2021-07-13 19:58:09,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353617005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:09,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789469204] [2021-07-13 19:58:09,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:09,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:58:09,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:09,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:09,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:09,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:58:09,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:09,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:09,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:09,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-13 19:58:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:09,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789469204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:09,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:09,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:58:09,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268047846] [2021-07-13 19:58:09,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:58:09,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:09,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:58:09,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:58:09,416 INFO L87 Difference]: Start difference. First operand 8001 states and 35201 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:12,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:12,602 INFO L93 Difference]: Finished difference Result 10320 states and 43112 transitions. [2021-07-13 19:58:12,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 19:58:12,603 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:12,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:12,632 INFO L225 Difference]: With dead ends: 10320 [2021-07-13 19:58:12,632 INFO L226 Difference]: Without dead ends: 10190 [2021-07-13 19:58:12,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 2669.1ms TimeCoverageRelationStatistics Valid=666, Invalid=4164, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 19:58:12,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10190 states. [2021-07-13 19:58:12,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10190 to 7931. [2021-07-13 19:58:12,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7930 states have (on average 4.400252206809584) internal successors, (34894), 7930 states have internal predecessors, (34894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 34894 transitions. [2021-07-13 19:58:12,804 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 34894 transitions. Word has length 33 [2021-07-13 19:58:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:12,804 INFO L482 AbstractCegarLoop]: Abstraction has 7931 states and 34894 transitions. [2021-07-13 19:58:12,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:12,804 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 34894 transitions. [2021-07-13 19:58:12,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:12,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:12,820 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:13,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:13,021 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:13,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:13,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1461423050, now seen corresponding path program 120 times [2021-07-13 19:58:13,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:13,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539108305] [2021-07-13 19:58:13,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:13,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:13,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539108305] [2021-07-13 19:58:13,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539108305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:13,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633369501] [2021-07-13 19:58:13,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:13,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:58:13,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:13,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:13,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:13,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:13,420 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:58:13,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-07-13 19:58:13,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:58:13,449 INFO L628 ElimStorePlain]: treesize reduction 88, result has 20.0 percent of original size [2021-07-13 19:58:13,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:13,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-13 19:58:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:13,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633369501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:13,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:13,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:58:13,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139621155] [2021-07-13 19:58:13,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:58:13,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:13,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:58:13,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:58:13,552 INFO L87 Difference]: Start difference. First operand 7931 states and 34894 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:15,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:15,025 INFO L93 Difference]: Finished difference Result 8423 states and 36711 transitions. [2021-07-13 19:58:15,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:58:15,025 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:15,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:15,050 INFO L225 Difference]: With dead ends: 8423 [2021-07-13 19:58:15,050 INFO L226 Difference]: Without dead ends: 8372 [2021-07-13 19:58:15,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1166.1ms TimeCoverageRelationStatistics Valid=214, Invalid=2042, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:58:15,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8372 states. [2021-07-13 19:58:15,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8372 to 7913. [2021-07-13 19:58:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7913 states, 7912 states have (on average 4.39989888776542) internal successors, (34812), 7912 states have internal predecessors, (34812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:15,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7913 states to 7913 states and 34812 transitions. [2021-07-13 19:58:15,193 INFO L78 Accepts]: Start accepts. Automaton has 7913 states and 34812 transitions. Word has length 33 [2021-07-13 19:58:15,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:15,193 INFO L482 AbstractCegarLoop]: Abstraction has 7913 states and 34812 transitions. [2021-07-13 19:58:15,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 7913 states and 34812 transitions. [2021-07-13 19:58:15,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:15,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:15,209 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:15,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-07-13 19:58:15,409 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:15,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:15,409 INFO L82 PathProgramCache]: Analyzing trace with hash 242007776, now seen corresponding path program 121 times [2021-07-13 19:58:15,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:15,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122652029] [2021-07-13 19:58:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:15,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:15,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122652029] [2021-07-13 19:58:15,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122652029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:15,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688773654] [2021-07-13 19:58:15,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:15,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:15,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:15,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:15,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 19:58:15,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:15,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:15,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:15,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 19:58:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:15,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688773654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:15,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:15,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:58:15,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929406589] [2021-07-13 19:58:15,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:58:15,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:15,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:58:15,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:58:15,814 INFO L87 Difference]: Start difference. First operand 7913 states and 34812 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:17,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:17,204 INFO L93 Difference]: Finished difference Result 8454 states and 36953 transitions. [2021-07-13 19:58:17,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:58:17,204 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:17,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:17,228 INFO L225 Difference]: With dead ends: 8454 [2021-07-13 19:58:17,228 INFO L226 Difference]: Without dead ends: 8401 [2021-07-13 19:58:17,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1127.2ms TimeCoverageRelationStatistics Valid=236, Invalid=1744, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:58:17,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8401 states. [2021-07-13 19:58:17,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8401 to 7899. [2021-07-13 19:58:17,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7899 states, 7898 states have (on average 4.402000506457331) internal successors, (34767), 7898 states have internal predecessors, (34767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7899 states to 7899 states and 34767 transitions. [2021-07-13 19:58:17,374 INFO L78 Accepts]: Start accepts. Automaton has 7899 states and 34767 transitions. Word has length 33 [2021-07-13 19:58:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:17,374 INFO L482 AbstractCegarLoop]: Abstraction has 7899 states and 34767 transitions. [2021-07-13 19:58:17,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 7899 states and 34767 transitions. [2021-07-13 19:58:17,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:17,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:17,390 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:17,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:17,590 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:17,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:17,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1010380462, now seen corresponding path program 122 times [2021-07-13 19:58:17,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:17,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315392179] [2021-07-13 19:58:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:17,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:17,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315392179] [2021-07-13 19:58:17,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315392179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:17,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594779525] [2021-07-13 19:58:17,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:17,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:17,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:17,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 19:58:17,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:17,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:17,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:17,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:17,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 30 [2021-07-13 19:58:17,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:17,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:17,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:17,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-07-13 19:58:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:18,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594779525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:18,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:18,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:58:18,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532247942] [2021-07-13 19:58:18,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:58:18,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:18,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:58:18,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:58:18,071 INFO L87 Difference]: Start difference. First operand 7899 states and 34767 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:19,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:19,280 INFO L93 Difference]: Finished difference Result 8630 states and 37667 transitions. [2021-07-13 19:58:19,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:58:19,280 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:19,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:19,305 INFO L225 Difference]: With dead ends: 8630 [2021-07-13 19:58:19,305 INFO L226 Difference]: Without dead ends: 8611 [2021-07-13 19:58:19,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 967.6ms TimeCoverageRelationStatistics Valid=216, Invalid=1424, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:58:19,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8611 states. [2021-07-13 19:58:19,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8611 to 8024. [2021-07-13 19:58:19,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8024 states, 8023 states have (on average 4.406331796086252) internal successors, (35352), 8023 states have internal predecessors, (35352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:19,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8024 states to 8024 states and 35352 transitions. [2021-07-13 19:58:19,466 INFO L78 Accepts]: Start accepts. Automaton has 8024 states and 35352 transitions. Word has length 33 [2021-07-13 19:58:19,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:19,466 INFO L482 AbstractCegarLoop]: Abstraction has 8024 states and 35352 transitions. [2021-07-13 19:58:19,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:19,466 INFO L276 IsEmpty]: Start isEmpty. Operand 8024 states and 35352 transitions. [2021-07-13 19:58:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:19,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:19,482 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:19,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-07-13 19:58:19,683 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:19,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:19,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1981314228, now seen corresponding path program 123 times [2021-07-13 19:58:19,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:19,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258818712] [2021-07-13 19:58:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:19,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:19,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258818712] [2021-07-13 19:58:19,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258818712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:19,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517848846] [2021-07-13 19:58:19,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:19,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:58:19,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:19,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 19:58:19,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:20,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:20,042 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:58:20,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-07-13 19:58:20,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:58:20,067 INFO L628 ElimStorePlain]: treesize reduction 88, result has 20.0 percent of original size [2021-07-13 19:58:20,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:20,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-13 19:58:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:20,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517848846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:20,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:20,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:58:20,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021863503] [2021-07-13 19:58:20,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:58:20,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:20,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:58:20,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:58:20,188 INFO L87 Difference]: Start difference. First operand 8024 states and 35352 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:21,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:21,607 INFO L93 Difference]: Finished difference Result 8769 states and 38202 transitions. [2021-07-13 19:58:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:58:21,607 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:21,632 INFO L225 Difference]: With dead ends: 8769 [2021-07-13 19:58:21,632 INFO L226 Difference]: Without dead ends: 8760 [2021-07-13 19:58:21,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1004.9ms TimeCoverageRelationStatistics Valid=307, Invalid=2243, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:58:21,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8760 states. [2021-07-13 19:58:21,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8760 to 8027. [2021-07-13 19:58:21,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8027 states, 8026 states have (on average 4.405307749813107) internal successors, (35357), 8026 states have internal predecessors, (35357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8027 states to 8027 states and 35357 transitions. [2021-07-13 19:58:21,814 INFO L78 Accepts]: Start accepts. Automaton has 8027 states and 35357 transitions. Word has length 33 [2021-07-13 19:58:21,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:21,814 INFO L482 AbstractCegarLoop]: Abstraction has 8027 states and 35357 transitions. [2021-07-13 19:58:21,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:21,814 INFO L276 IsEmpty]: Start isEmpty. Operand 8027 states and 35357 transitions. [2021-07-13 19:58:21,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:21,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:21,831 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:22,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-07-13 19:58:22,031 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:22,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:22,031 INFO L82 PathProgramCache]: Analyzing trace with hash 645259626, now seen corresponding path program 124 times [2021-07-13 19:58:22,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:22,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328645929] [2021-07-13 19:58:22,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:22,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:22,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328645929] [2021-07-13 19:58:22,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328645929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:22,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611280279] [2021-07-13 19:58:22,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:22,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:22,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:22,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:22,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:22,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:22,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 19:58:22,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:22,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:22,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:22,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 19:58:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:22,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611280279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:22,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:22,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:58:22,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287097805] [2021-07-13 19:58:22,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:58:22,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:22,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:58:22,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:58:22,431 INFO L87 Difference]: Start difference. First operand 8027 states and 35357 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:23,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:23,515 INFO L93 Difference]: Finished difference Result 8916 states and 38833 transitions. [2021-07-13 19:58:23,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:58:23,516 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:23,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:23,541 INFO L225 Difference]: With dead ends: 8916 [2021-07-13 19:58:23,541 INFO L226 Difference]: Without dead ends: 8902 [2021-07-13 19:58:23,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 721.2ms TimeCoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:58:23,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8902 states. [2021-07-13 19:58:23,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8902 to 8026. [2021-07-13 19:58:23,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8026 states, 8025 states have (on average 4.405482866043614) internal successors, (35354), 8025 states have internal predecessors, (35354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:23,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8026 states to 8026 states and 35354 transitions. [2021-07-13 19:58:23,702 INFO L78 Accepts]: Start accepts. Automaton has 8026 states and 35354 transitions. Word has length 33 [2021-07-13 19:58:23,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:23,702 INFO L482 AbstractCegarLoop]: Abstraction has 8026 states and 35354 transitions. [2021-07-13 19:58:23,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:23,702 INFO L276 IsEmpty]: Start isEmpty. Operand 8026 states and 35354 transitions. [2021-07-13 19:58:23,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:23,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:23,719 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:23,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:23,920 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:23,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:23,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1414290996, now seen corresponding path program 125 times [2021-07-13 19:58:23,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:23,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346699282] [2021-07-13 19:58:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:24,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:24,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346699282] [2021-07-13 19:58:24,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346699282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:24,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658668597] [2021-07-13 19:58:24,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:24,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:58:24,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:24,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:24,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:24,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:24,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 19:58:24,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:24,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:24,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:24,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 19:58:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:24,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658668597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:24,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:24,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:58:24,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752819728] [2021-07-13 19:58:24,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:58:24,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:24,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:58:24,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:58:24,326 INFO L87 Difference]: Start difference. First operand 8026 states and 35354 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:25,838 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-07-13 19:58:25,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:25,942 INFO L93 Difference]: Finished difference Result 9228 states and 40173 transitions. [2021-07-13 19:58:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:58:25,942 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:25,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:25,968 INFO L225 Difference]: With dead ends: 9228 [2021-07-13 19:58:25,968 INFO L226 Difference]: Without dead ends: 9200 [2021-07-13 19:58:25,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1300.0ms TimeCoverageRelationStatistics Valid=343, Invalid=2309, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 19:58:25,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9200 states. [2021-07-13 19:58:26,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9200 to 7989. [2021-07-13 19:58:26,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7989 states, 7988 states have (on average 4.4071106659989985) internal successors, (35204), 7988 states have internal predecessors, (35204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:26,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7989 states to 7989 states and 35204 transitions. [2021-07-13 19:58:26,136 INFO L78 Accepts]: Start accepts. Automaton has 7989 states and 35204 transitions. Word has length 33 [2021-07-13 19:58:26,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:26,136 INFO L482 AbstractCegarLoop]: Abstraction has 7989 states and 35204 transitions. [2021-07-13 19:58:26,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:26,136 INFO L276 IsEmpty]: Start isEmpty. Operand 7989 states and 35204 transitions. [2021-07-13 19:58:26,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:26,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:26,152 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:26,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-07-13 19:58:26,352 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:26,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:26,352 INFO L82 PathProgramCache]: Analyzing trace with hash 28128348, now seen corresponding path program 126 times [2021-07-13 19:58:26,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:26,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863236481] [2021-07-13 19:58:26,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:26,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:26,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863236481] [2021-07-13 19:58:26,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863236481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:26,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832633657] [2021-07-13 19:58:26,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:26,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:58:26,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:26,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:26,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:26,744 INFO L354 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2021-07-13 19:58:26,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 65 [2021-07-13 19:58:26,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:26,842 INFO L628 ElimStorePlain]: treesize reduction 59, result has 52.8 percent of original size [2021-07-13 19:58:26,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:26,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:66 [2021-07-13 19:58:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:27,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832633657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:27,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:27,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:58:27,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951664722] [2021-07-13 19:58:27,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:58:27,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:27,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:58:27,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:58:27,050 INFO L87 Difference]: Start difference. First operand 7989 states and 35204 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:28,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:28,775 INFO L93 Difference]: Finished difference Result 8441 states and 36961 transitions. [2021-07-13 19:58:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:58:28,775 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:28,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:28,800 INFO L225 Difference]: With dead ends: 8441 [2021-07-13 19:58:28,800 INFO L226 Difference]: Without dead ends: 8426 [2021-07-13 19:58:28,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1377.0ms TimeCoverageRelationStatistics Valid=232, Invalid=2120, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:58:28,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8426 states. [2021-07-13 19:58:28,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8426 to 7977. [2021-07-13 19:58:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7977 states, 7976 states have (on average 4.407973921765296) internal successors, (35158), 7976 states have internal predecessors, (35158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:28,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7977 states to 7977 states and 35158 transitions. [2021-07-13 19:58:28,956 INFO L78 Accepts]: Start accepts. Automaton has 7977 states and 35158 transitions. Word has length 33 [2021-07-13 19:58:28,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:28,957 INFO L482 AbstractCegarLoop]: Abstraction has 7977 states and 35158 transitions. [2021-07-13 19:58:28,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:28,957 INFO L276 IsEmpty]: Start isEmpty. Operand 7977 states and 35158 transitions. [2021-07-13 19:58:28,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:28,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:28,972 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:29,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:29,173 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:29,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2103584114, now seen corresponding path program 127 times [2021-07-13 19:58:29,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:29,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438929526] [2021-07-13 19:58:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:29,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:29,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438929526] [2021-07-13 19:58:29,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438929526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:29,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691936020] [2021-07-13 19:58:29,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:29,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:29,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:29,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:58:29,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:29,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:29,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:29,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 19:58:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:29,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691936020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:29,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:29,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:58:29,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333909605] [2021-07-13 19:58:29,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:58:29,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:29,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:58:29,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:58:29,603 INFO L87 Difference]: Start difference. First operand 7977 states and 35158 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:30,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:30,974 INFO L93 Difference]: Finished difference Result 8611 states and 37664 transitions. [2021-07-13 19:58:30,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:58:30,974 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:30,998 INFO L225 Difference]: With dead ends: 8611 [2021-07-13 19:58:30,998 INFO L226 Difference]: Without dead ends: 8596 [2021-07-13 19:58:30,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 921.1ms TimeCoverageRelationStatistics Valid=232, Invalid=2120, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:58:31,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8596 states. [2021-07-13 19:58:31,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8596 to 7977. [2021-07-13 19:58:31,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7977 states, 7976 states have (on average 4.407973921765296) internal successors, (35158), 7976 states have internal predecessors, (35158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:31,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7977 states to 7977 states and 35158 transitions. [2021-07-13 19:58:31,146 INFO L78 Accepts]: Start accepts. Automaton has 7977 states and 35158 transitions. Word has length 33 [2021-07-13 19:58:31,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:31,147 INFO L482 AbstractCegarLoop]: Abstraction has 7977 states and 35158 transitions. [2021-07-13 19:58:31,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:31,147 INFO L276 IsEmpty]: Start isEmpty. Operand 7977 states and 35158 transitions. [2021-07-13 19:58:31,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:31,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:31,162 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:31,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-07-13 19:58:31,362 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:31,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:31,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1757353836, now seen corresponding path program 128 times [2021-07-13 19:58:31,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:31,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487480824] [2021-07-13 19:58:31,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:31,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:31,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487480824] [2021-07-13 19:58:31,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487480824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:31,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195587326] [2021-07-13 19:58:31,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:31,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:31,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:31,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 19:58:31,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:31,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:31,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:31,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-07-13 19:58:31,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:31,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:31,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:31,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:42 [2021-07-13 19:58:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:31,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195587326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:31,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:31,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:58:31,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893132044] [2021-07-13 19:58:31,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:58:31,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:31,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:58:31,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:58:31,948 INFO L87 Difference]: Start difference. First operand 7977 states and 35158 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:32,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:32,877 INFO L93 Difference]: Finished difference Result 8422 states and 36826 transitions. [2021-07-13 19:58:32,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:58:32,877 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:32,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:32,992 INFO L225 Difference]: With dead ends: 8422 [2021-07-13 19:58:32,992 INFO L226 Difference]: Without dead ends: 8407 [2021-07-13 19:58:32,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 746.7ms TimeCoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:58:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8407 states. [2021-07-13 19:58:33,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8407 to 7965. [2021-07-13 19:58:33,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7965 states, 7964 states have (on average 4.40796082370668) internal successors, (35105), 7964 states have internal predecessors, (35105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:33,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7965 states to 7965 states and 35105 transitions. [2021-07-13 19:58:33,142 INFO L78 Accepts]: Start accepts. Automaton has 7965 states and 35105 transitions. Word has length 33 [2021-07-13 19:58:33,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:33,142 INFO L482 AbstractCegarLoop]: Abstraction has 7965 states and 35105 transitions. [2021-07-13 19:58:33,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:33,143 INFO L276 IsEmpty]: Start isEmpty. Operand 7965 states and 35105 transitions. [2021-07-13 19:58:33,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:33,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:33,159 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:33,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-07-13 19:58:33,360 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:33,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:33,360 INFO L82 PathProgramCache]: Analyzing trace with hash 793976442, now seen corresponding path program 129 times [2021-07-13 19:58:33,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:33,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433176137] [2021-07-13 19:58:33,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:33,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:33,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433176137] [2021-07-13 19:58:33,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433176137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:33,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696733495] [2021-07-13 19:58:33,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:33,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:58:33,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:33,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:33,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:33,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:33,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-07-13 19:58:33,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:33,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:33,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:33,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:36 [2021-07-13 19:58:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:34,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696733495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:34,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:34,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:58:34,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941816643] [2021-07-13 19:58:34,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:58:34,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:34,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:58:34,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:58:34,004 INFO L87 Difference]: Start difference. First operand 7965 states and 35105 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:34,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:34,685 INFO L93 Difference]: Finished difference Result 8230 states and 36123 transitions. [2021-07-13 19:58:34,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:58:34,685 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:34,709 INFO L225 Difference]: With dead ends: 8230 [2021-07-13 19:58:34,709 INFO L226 Difference]: Without dead ends: 8215 [2021-07-13 19:58:34,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 601.4ms TimeCoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:58:34,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8215 states. [2021-07-13 19:58:34,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8215 to 7967. [2021-07-13 19:58:34,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7967 states, 7966 states have (on average 4.407732864674868) internal successors, (35112), 7966 states have internal predecessors, (35112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7967 states to 7967 states and 35112 transitions. [2021-07-13 19:58:34,856 INFO L78 Accepts]: Start accepts. Automaton has 7967 states and 35112 transitions. Word has length 33 [2021-07-13 19:58:34,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:34,856 INFO L482 AbstractCegarLoop]: Abstraction has 7967 states and 35112 transitions. [2021-07-13 19:58:34,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:34,856 INFO L276 IsEmpty]: Start isEmpty. Operand 7967 states and 35112 transitions. [2021-07-13 19:58:34,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:34,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:34,872 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:35,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:35,073 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:35,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:35,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1163372282, now seen corresponding path program 130 times [2021-07-13 19:58:35,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:35,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439255253] [2021-07-13 19:58:35,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:35,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:35,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439255253] [2021-07-13 19:58:35,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439255253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:35,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335711878] [2021-07-13 19:58:35,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:35,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:35,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:35,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:35,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:35,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:58:35,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:35,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:35,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:35,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-13 19:58:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:35,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335711878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:35,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:35,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:58:35,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071179431] [2021-07-13 19:58:35,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:58:35,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:35,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:58:35,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:58:35,559 INFO L87 Difference]: Start difference. First operand 7967 states and 35112 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:36,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:36,950 INFO L93 Difference]: Finished difference Result 8620 states and 37745 transitions. [2021-07-13 19:58:36,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:58:36,951 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:36,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:36,979 INFO L225 Difference]: With dead ends: 8620 [2021-07-13 19:58:36,980 INFO L226 Difference]: Without dead ends: 8605 [2021-07-13 19:58:36,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1039.0ms TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:58:36,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8605 states. [2021-07-13 19:58:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8605 to 7959. [2021-07-13 19:58:37,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7959 states, 7958 states have (on average 4.40877104800201) internal successors, (35085), 7958 states have internal predecessors, (35085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:37,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7959 states to 7959 states and 35085 transitions. [2021-07-13 19:58:37,151 INFO L78 Accepts]: Start accepts. Automaton has 7959 states and 35085 transitions. Word has length 33 [2021-07-13 19:58:37,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:37,151 INFO L482 AbstractCegarLoop]: Abstraction has 7959 states and 35085 transitions. [2021-07-13 19:58:37,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:37,151 INFO L276 IsEmpty]: Start isEmpty. Operand 7959 states and 35085 transitions. [2021-07-13 19:58:37,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:37,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:37,171 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:37,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:37,372 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:37,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:37,372 INFO L82 PathProgramCache]: Analyzing trace with hash -889027030, now seen corresponding path program 131 times [2021-07-13 19:58:37,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:37,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007050146] [2021-07-13 19:58:37,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:37,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:37,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007050146] [2021-07-13 19:58:37,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007050146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:37,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659707681] [2021-07-13 19:58:37,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:37,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:58:37,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:37,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:37,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:37,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:58:37,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:37,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:37,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:37,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-13 19:58:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:37,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659707681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:37,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:37,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:58:37,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639327191] [2021-07-13 19:58:37,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:58:37,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:37,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:58:37,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:58:37,828 INFO L87 Difference]: Start difference. First operand 7959 states and 35085 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:39,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:39,230 INFO L93 Difference]: Finished difference Result 9968 states and 43133 transitions. [2021-07-13 19:58:39,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:58:39,231 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:39,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:39,259 INFO L225 Difference]: With dead ends: 9968 [2021-07-13 19:58:39,259 INFO L226 Difference]: Without dead ends: 9930 [2021-07-13 19:58:39,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1150.3ms TimeCoverageRelationStatistics Valid=405, Invalid=2351, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:58:39,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9930 states. [2021-07-13 19:58:39,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9930 to 8187. [2021-07-13 19:58:39,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8187 states, 8186 states have (on average 4.420107500610799) internal successors, (36183), 8186 states have internal predecessors, (36183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8187 states to 8187 states and 36183 transitions. [2021-07-13 19:58:39,494 INFO L78 Accepts]: Start accepts. Automaton has 8187 states and 36183 transitions. Word has length 33 [2021-07-13 19:58:39,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:39,494 INFO L482 AbstractCegarLoop]: Abstraction has 8187 states and 36183 transitions. [2021-07-13 19:58:39,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:39,494 INFO L276 IsEmpty]: Start isEmpty. Operand 8187 states and 36183 transitions. [2021-07-13 19:58:39,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:39,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:39,510 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:39,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:39,710 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:39,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:39,711 INFO L82 PathProgramCache]: Analyzing trace with hash 414245576, now seen corresponding path program 132 times [2021-07-13 19:58:39,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:39,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44677723] [2021-07-13 19:58:39,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:39,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:39,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44677723] [2021-07-13 19:58:39,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44677723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:39,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306333374] [2021-07-13 19:58:39,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:39,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:58:39,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:39,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:39,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:40,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:40,102 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:58:40,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-07-13 19:58:40,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:58:40,130 INFO L628 ElimStorePlain]: treesize reduction 84, result has 22.2 percent of original size [2021-07-13 19:58:40,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:40,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:24 [2021-07-13 19:58:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:40,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306333374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:40,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:40,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:58:40,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884521573] [2021-07-13 19:58:40,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:58:40,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:40,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:58:40,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:58:40,256 INFO L87 Difference]: Start difference. First operand 8187 states and 36183 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:41,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:41,855 INFO L93 Difference]: Finished difference Result 9592 states and 41585 transitions. [2021-07-13 19:58:41,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:58:41,855 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:41,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:41,882 INFO L225 Difference]: With dead ends: 9592 [2021-07-13 19:58:41,882 INFO L226 Difference]: Without dead ends: 9570 [2021-07-13 19:58:41,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1166.9ms TimeCoverageRelationStatistics Valid=396, Invalid=2910, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 19:58:41,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9570 states. [2021-07-13 19:58:42,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9570 to 8382. [2021-07-13 19:58:42,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8382 states, 8381 states have (on average 4.422503281231356) internal successors, (37065), 8381 states have internal predecessors, (37065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:42,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8382 states to 8382 states and 37065 transitions. [2021-07-13 19:58:42,049 INFO L78 Accepts]: Start accepts. Automaton has 8382 states and 37065 transitions. Word has length 33 [2021-07-13 19:58:42,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:42,049 INFO L482 AbstractCegarLoop]: Abstraction has 8382 states and 37065 transitions. [2021-07-13 19:58:42,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:42,050 INFO L276 IsEmpty]: Start isEmpty. Operand 8382 states and 37065 transitions. [2021-07-13 19:58:42,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:42,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:42,066 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:42,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:42,266 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:42,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:42,266 INFO L82 PathProgramCache]: Analyzing trace with hash -485116496, now seen corresponding path program 133 times [2021-07-13 19:58:42,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:42,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145428166] [2021-07-13 19:58:42,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:42,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:42,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145428166] [2021-07-13 19:58:42,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145428166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:42,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421532569] [2021-07-13 19:58:42,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:42,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:42,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:42,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:58:42,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:42,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:42,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:42,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-13 19:58:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:42,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421532569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:42,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:42,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:58:42,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99251567] [2021-07-13 19:58:42,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:58:42,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:42,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:58:42,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:58:42,684 INFO L87 Difference]: Start difference. First operand 8382 states and 37065 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:44,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:44,429 INFO L93 Difference]: Finished difference Result 10248 states and 44279 transitions. [2021-07-13 19:58:44,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:58:44,430 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:44,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:44,459 INFO L225 Difference]: With dead ends: 10248 [2021-07-13 19:58:44,459 INFO L226 Difference]: Without dead ends: 10205 [2021-07-13 19:58:44,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1334.1ms TimeCoverageRelationStatistics Valid=479, Invalid=3181, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 19:58:44,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10205 states. [2021-07-13 19:58:44,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10205 to 8315. [2021-07-13 19:58:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8315 states, 8314 states have (on average 4.427592013471253) internal successors, (36811), 8314 states have internal predecessors, (36811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8315 states to 8315 states and 36811 transitions. [2021-07-13 19:58:44,651 INFO L78 Accepts]: Start accepts. Automaton has 8315 states and 36811 transitions. Word has length 33 [2021-07-13 19:58:44,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:44,652 INFO L482 AbstractCegarLoop]: Abstraction has 8315 states and 36811 transitions. [2021-07-13 19:58:44,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:44,652 INFO L276 IsEmpty]: Start isEmpty. Operand 8315 states and 36811 transitions. [2021-07-13 19:58:44,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:44,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:44,668 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:44,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-07-13 19:58:44,868 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:44,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:44,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1871279144, now seen corresponding path program 134 times [2021-07-13 19:58:44,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:44,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292707695] [2021-07-13 19:58:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:45,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:45,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292707695] [2021-07-13 19:58:45,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292707695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:45,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251870355] [2021-07-13 19:58:45,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:45,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:45,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:45,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 19:58:45,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:45,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:45,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-07-13 19:58:45,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:45,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:45,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:45,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-07-13 19:58:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:45,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251870355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:45,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:45,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 19:58:45,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920449552] [2021-07-13 19:58:45,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:58:45,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:45,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:58:45,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:58:45,343 INFO L87 Difference]: Start difference. First operand 8315 states and 36811 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:47,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:47,339 INFO L93 Difference]: Finished difference Result 9453 states and 41464 transitions. [2021-07-13 19:58:47,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 19:58:47,339 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:47,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:47,366 INFO L225 Difference]: With dead ends: 9453 [2021-07-13 19:58:47,366 INFO L226 Difference]: Without dead ends: 9423 [2021-07-13 19:58:47,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1594.4ms TimeCoverageRelationStatistics Valid=467, Invalid=3315, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 19:58:47,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9423 states. [2021-07-13 19:58:47,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9423 to 8300. [2021-07-13 19:58:47,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8300 states, 8299 states have (on average 4.428846849017954) internal successors, (36755), 8299 states have internal predecessors, (36755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:47,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8300 states to 8300 states and 36755 transitions. [2021-07-13 19:58:47,532 INFO L78 Accepts]: Start accepts. Automaton has 8300 states and 36755 transitions. Word has length 33 [2021-07-13 19:58:47,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:47,532 INFO L482 AbstractCegarLoop]: Abstraction has 8300 states and 36755 transitions. [2021-07-13 19:58:47,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:47,532 INFO L276 IsEmpty]: Start isEmpty. Operand 8300 states and 36755 transitions. [2021-07-13 19:58:47,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:47,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:47,548 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:47,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-07-13 19:58:47,749 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:47,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:47,749 INFO L82 PathProgramCache]: Analyzing trace with hash 204176622, now seen corresponding path program 135 times [2021-07-13 19:58:47,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:47,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117243324] [2021-07-13 19:58:47,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:47,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:47,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117243324] [2021-07-13 19:58:47,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117243324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:47,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158221456] [2021-07-13 19:58:47,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:47,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:58:47,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:47,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:47,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:48,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:48,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-07-13 19:58:48,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:48,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:48,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:48,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:36 [2021-07-13 19:58:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:48,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158221456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:48,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:48,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:58:48,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077619059] [2021-07-13 19:58:48,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:58:48,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:48,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:58:48,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:58:48,316 INFO L87 Difference]: Start difference. First operand 8300 states and 36755 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:49,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:49,232 INFO L93 Difference]: Finished difference Result 8854 states and 38974 transitions. [2021-07-13 19:58:49,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:58:49,232 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:49,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:49,259 INFO L225 Difference]: With dead ends: 8854 [2021-07-13 19:58:49,259 INFO L226 Difference]: Without dead ends: 8839 [2021-07-13 19:58:49,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 639.1ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:58:49,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8839 states. [2021-07-13 19:58:49,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8839 to 8288. [2021-07-13 19:58:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 4.428864486545192) internal successors, (36702), 8287 states have internal predecessors, (36702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:49,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 36702 transitions. [2021-07-13 19:58:49,436 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 36702 transitions. Word has length 33 [2021-07-13 19:58:49,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:49,436 INFO L482 AbstractCegarLoop]: Abstraction has 8288 states and 36702 transitions. [2021-07-13 19:58:49,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:49,436 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 36702 transitions. [2021-07-13 19:58:49,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:49,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:49,453 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:49,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-07-13 19:58:49,653 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:49,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1060260590, now seen corresponding path program 136 times [2021-07-13 19:58:49,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:49,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717459782] [2021-07-13 19:58:49,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:49,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:49,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717459782] [2021-07-13 19:58:49,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717459782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:49,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546572224] [2021-07-13 19:58:49,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:49,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:49,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:49,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:49,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:49,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:58:49,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:49,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:49,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:49,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 19:58:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:50,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546572224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:50,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:50,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:58:50,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262782300] [2021-07-13 19:58:50,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:58:50,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:50,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:58:50,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:58:50,041 INFO L87 Difference]: Start difference. First operand 8288 states and 36702 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:51,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:51,481 INFO L93 Difference]: Finished difference Result 9785 states and 42725 transitions. [2021-07-13 19:58:51,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:58:51,481 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:51,510 INFO L225 Difference]: With dead ends: 9785 [2021-07-13 19:58:51,510 INFO L226 Difference]: Without dead ends: 9747 [2021-07-13 19:58:51,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1192.6ms TimeCoverageRelationStatistics Valid=457, Invalid=2405, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:58:51,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9747 states. [2021-07-13 19:58:51,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9747 to 8534. [2021-07-13 19:58:51,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8534 states, 8533 states have (on average 4.434079456228759) internal successors, (37836), 8533 states have internal predecessors, (37836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8534 states to 8534 states and 37836 transitions. [2021-07-13 19:58:51,694 INFO L78 Accepts]: Start accepts. Automaton has 8534 states and 37836 transitions. Word has length 33 [2021-07-13 19:58:51,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:51,694 INFO L482 AbstractCegarLoop]: Abstraction has 8534 states and 37836 transitions. [2021-07-13 19:58:51,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:51,694 INFO L276 IsEmpty]: Start isEmpty. Operand 8534 states and 37836 transitions. [2021-07-13 19:58:51,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:51,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:51,711 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:51,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:51,912 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:51,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:51,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1931434100, now seen corresponding path program 137 times [2021-07-13 19:58:51,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:51,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137918277] [2021-07-13 19:58:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:52,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:52,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137918277] [2021-07-13 19:58:52,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137918277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:52,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868246275] [2021-07-13 19:58:52,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:52,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:58:52,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:52,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:52,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:52,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:52,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 19:58:52,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:52,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:52,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:52,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 19:58:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:52,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868246275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:52,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:52,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:58:52,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336156925] [2021-07-13 19:58:52,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:58:52,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:52,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:58:52,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:58:52,317 INFO L87 Difference]: Start difference. First operand 8534 states and 37836 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:53,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:53,435 INFO L93 Difference]: Finished difference Result 9563 states and 41674 transitions. [2021-07-13 19:58:53,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:58:53,435 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:53,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:53,466 INFO L225 Difference]: With dead ends: 9563 [2021-07-13 19:58:53,466 INFO L226 Difference]: Without dead ends: 9523 [2021-07-13 19:58:53,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 921.1ms TimeCoverageRelationStatistics Valid=371, Invalid=1791, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:58:53,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9523 states. [2021-07-13 19:58:53,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9523 to 8497. [2021-07-13 19:58:53,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8497 states, 8496 states have (on average 4.435381355932203) internal successors, (37683), 8496 states have internal predecessors, (37683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:53,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8497 states to 8497 states and 37683 transitions. [2021-07-13 19:58:53,644 INFO L78 Accepts]: Start accepts. Automaton has 8497 states and 37683 transitions. Word has length 33 [2021-07-13 19:58:53,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:53,644 INFO L482 AbstractCegarLoop]: Abstraction has 8497 states and 37683 transitions. [2021-07-13 19:58:53,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:53,644 INFO L276 IsEmpty]: Start isEmpty. Operand 8497 states and 37683 transitions. [2021-07-13 19:58:53,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:53,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:53,662 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:53,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:53,862 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:53,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:53,862 INFO L82 PathProgramCache]: Analyzing trace with hash 78008476, now seen corresponding path program 138 times [2021-07-13 19:58:53,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:53,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606665923] [2021-07-13 19:58:53,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:54,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:54,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606665923] [2021-07-13 19:58:54,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606665923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:54,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75171184] [2021-07-13 19:58:54,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:54,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:58:54,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:54,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:54,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:54,226 INFO L354 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2021-07-13 19:58:54,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 67 [2021-07-13 19:58:54,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:54,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:54,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:54,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:71 [2021-07-13 19:58:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:54,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75171184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:54,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:54,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:58:54,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770721394] [2021-07-13 19:58:54,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:58:54,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:54,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:58:54,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:58:54,620 INFO L87 Difference]: Start difference. First operand 8497 states and 37683 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:56,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:56,555 INFO L93 Difference]: Finished difference Result 9057 states and 39876 transitions. [2021-07-13 19:58:56,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:58:56,555 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:56,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:56,582 INFO L225 Difference]: With dead ends: 9057 [2021-07-13 19:58:56,582 INFO L226 Difference]: Without dead ends: 9013 [2021-07-13 19:58:56,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1642.3ms TimeCoverageRelationStatistics Valid=280, Invalid=2582, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:58:56,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9013 states. [2021-07-13 19:58:56,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9013 to 8515. [2021-07-13 19:58:56,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8515 states, 8514 states have (on average 4.436457599248297) internal successors, (37772), 8514 states have internal predecessors, (37772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8515 states to 8515 states and 37772 transitions. [2021-07-13 19:58:56,808 INFO L78 Accepts]: Start accepts. Automaton has 8515 states and 37772 transitions. Word has length 33 [2021-07-13 19:58:56,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:56,808 INFO L482 AbstractCegarLoop]: Abstraction has 8515 states and 37772 transitions. [2021-07-13 19:58:56,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:56,808 INFO L276 IsEmpty]: Start isEmpty. Operand 8515 states and 37772 transitions. [2021-07-13 19:58:56,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:56,825 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:56,825 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:57,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:57,025 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:57,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:57,026 INFO L82 PathProgramCache]: Analyzing trace with hash -970763926, now seen corresponding path program 139 times [2021-07-13 19:58:57,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:57,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673830957] [2021-07-13 19:58:57,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:57,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:57,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:57,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673830957] [2021-07-13 19:58:57,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673830957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:57,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005824660] [2021-07-13 19:58:57,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:57,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:57,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:57,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:58:57,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:57,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:57,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:57,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 19:58:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:57,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005824660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:57,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:57,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:58:57,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623062997] [2021-07-13 19:58:57,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:58:57,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:57,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:58:57,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:58:57,442 INFO L87 Difference]: Start difference. First operand 8515 states and 37772 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:59,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:59,188 INFO L93 Difference]: Finished difference Result 10249 states and 44471 transitions. [2021-07-13 19:58:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 19:58:59,188 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:58:59,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:59,217 INFO L225 Difference]: With dead ends: 10249 [2021-07-13 19:58:59,217 INFO L226 Difference]: Without dead ends: 10211 [2021-07-13 19:58:59,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1407.0ms TimeCoverageRelationStatistics Valid=482, Invalid=2824, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 19:58:59,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10211 states. [2021-07-13 19:58:59,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10211 to 8676. [2021-07-13 19:58:59,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8676 states, 8675 states have (on average 4.440461095100865) internal successors, (38521), 8675 states have internal predecessors, (38521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:59,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8676 states to 8676 states and 38521 transitions. [2021-07-13 19:58:59,391 INFO L78 Accepts]: Start accepts. Automaton has 8676 states and 38521 transitions. Word has length 33 [2021-07-13 19:58:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:59,391 INFO L482 AbstractCegarLoop]: Abstraction has 8676 states and 38521 transitions. [2021-07-13 19:58:59,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 8676 states and 38521 transitions. [2021-07-13 19:58:59,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:58:59,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:59,408 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:59,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-07-13 19:58:59,609 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:59,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:59,609 INFO L82 PathProgramCache]: Analyzing trace with hash 332508680, now seen corresponding path program 140 times [2021-07-13 19:58:59,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:59,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094453009] [2021-07-13 19:58:59,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:59,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:59,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094453009] [2021-07-13 19:58:59,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094453009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:59,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910358835] [2021-07-13 19:58:59,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:59,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:59,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:59,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:58:59,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:59,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:59,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 19:58:59,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:59,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:59,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:59,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 19:59:00,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:00,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910358835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:00,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:00,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:59:00,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88797581] [2021-07-13 19:59:00,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:59:00,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:00,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:59:00,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:59:00,112 INFO L87 Difference]: Start difference. First operand 8676 states and 38521 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:01,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:01,609 INFO L93 Difference]: Finished difference Result 9607 states and 42063 transitions. [2021-07-13 19:59:01,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:59:01,610 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:01,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:01,638 INFO L225 Difference]: With dead ends: 9607 [2021-07-13 19:59:01,638 INFO L226 Difference]: Without dead ends: 9594 [2021-07-13 19:59:01,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1298.6ms TimeCoverageRelationStatistics Valid=433, Invalid=1823, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:59:01,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9594 states. [2021-07-13 19:59:01,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9594 to 8697. [2021-07-13 19:59:01,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8697 states, 8696 states have (on average 4.440892364305427) internal successors, (38618), 8696 states have internal predecessors, (38618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:01,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8697 states to 8697 states and 38618 transitions. [2021-07-13 19:59:01,815 INFO L78 Accepts]: Start accepts. Automaton has 8697 states and 38618 transitions. Word has length 33 [2021-07-13 19:59:01,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:01,816 INFO L482 AbstractCegarLoop]: Abstraction has 8697 states and 38618 transitions. [2021-07-13 19:59:01,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:01,816 INFO L276 IsEmpty]: Start isEmpty. Operand 8697 states and 38618 transitions. [2021-07-13 19:59:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:01,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:01,833 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:02,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-07-13 19:59:02,034 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:02,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:02,034 INFO L82 PathProgramCache]: Analyzing trace with hash -566853392, now seen corresponding path program 141 times [2021-07-13 19:59:02,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:02,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064820846] [2021-07-13 19:59:02,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:02,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:02,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064820846] [2021-07-13 19:59:02,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064820846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:02,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166331321] [2021-07-13 19:59:02,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:02,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:59:02,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:02,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 19:59:02,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:02,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:02,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:59:02,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:02,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:02,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:02,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-13 19:59:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:02,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166331321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:02,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:02,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:59:02,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370231508] [2021-07-13 19:59:02,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:59:02,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:02,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:59:02,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:59:02,525 INFO L87 Difference]: Start difference. First operand 8697 states and 38618 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:03,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:03,794 INFO L93 Difference]: Finished difference Result 9635 states and 42211 transitions. [2021-07-13 19:59:03,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:59:03,794 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:03,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:03,823 INFO L225 Difference]: With dead ends: 9635 [2021-07-13 19:59:03,823 INFO L226 Difference]: Without dead ends: 9605 [2021-07-13 19:59:03,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 966.7ms TimeCoverageRelationStatistics Valid=284, Invalid=1786, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:59:03,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9605 states. [2021-07-13 19:59:03,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9605 to 8701. [2021-07-13 19:59:03,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8701 states, 8700 states have (on average 4.440689655172414) internal successors, (38634), 8700 states have internal predecessors, (38634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8701 states to 8701 states and 38634 transitions. [2021-07-13 19:59:04,002 INFO L78 Accepts]: Start accepts. Automaton has 8701 states and 38634 transitions. Word has length 33 [2021-07-13 19:59:04,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:04,002 INFO L482 AbstractCegarLoop]: Abstraction has 8701 states and 38634 transitions. [2021-07-13 19:59:04,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:04,002 INFO L276 IsEmpty]: Start isEmpty. Operand 8701 states and 38634 transitions. [2021-07-13 19:59:04,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:04,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:04,019 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:04,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-07-13 19:59:04,220 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:04,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:04,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1947515602, now seen corresponding path program 142 times [2021-07-13 19:59:04,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:04,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051853506] [2021-07-13 19:59:04,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:04,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:04,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051853506] [2021-07-13 19:59:04,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051853506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:04,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577678727] [2021-07-13 19:59:04,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:04,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:04,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:04,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:04,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:04,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:04,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 19:59:04,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:04,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:04,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:04,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 19:59:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:04,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577678727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:04,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:04,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:59:04,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628478144] [2021-07-13 19:59:04,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:59:04,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:04,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:59:04,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:59:04,638 INFO L87 Difference]: Start difference. First operand 8701 states and 38634 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:06,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:06,011 INFO L93 Difference]: Finished difference Result 10005 states and 43498 transitions. [2021-07-13 19:59:06,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:59:06,011 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:06,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:06,042 INFO L225 Difference]: With dead ends: 10005 [2021-07-13 19:59:06,043 INFO L226 Difference]: Without dead ends: 9971 [2021-07-13 19:59:06,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1107.0ms TimeCoverageRelationStatistics Valid=404, Invalid=2146, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:59:06,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9971 states. [2021-07-13 19:59:06,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9971 to 8710. [2021-07-13 19:59:06,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8710 states, 8709 states have (on average 4.443334481570789) internal successors, (38697), 8709 states have internal predecessors, (38697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:06,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8710 states to 8710 states and 38697 transitions. [2021-07-13 19:59:06,233 INFO L78 Accepts]: Start accepts. Automaton has 8710 states and 38697 transitions. Word has length 33 [2021-07-13 19:59:06,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:06,233 INFO L482 AbstractCegarLoop]: Abstraction has 8710 states and 38697 transitions. [2021-07-13 19:59:06,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:06,234 INFO L276 IsEmpty]: Start isEmpty. Operand 8710 states and 38697 transitions. [2021-07-13 19:59:06,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:06,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:06,251 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:06,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-07-13 19:59:06,451 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:06,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:06,451 INFO L82 PathProgramCache]: Analyzing trace with hash -451531606, now seen corresponding path program 143 times [2021-07-13 19:59:06,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:06,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025125958] [2021-07-13 19:59:06,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:06,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:06,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025125958] [2021-07-13 19:59:06,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025125958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:06,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229150961] [2021-07-13 19:59:06,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:06,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:59:06,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:06,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:06,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:06,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:59:06,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:06,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:06,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:06,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 19:59:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:06,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229150961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:06,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:06,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:59:06,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365215742] [2021-07-13 19:59:06,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:59:06,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:06,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:59:06,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:59:06,864 INFO L87 Difference]: Start difference. First operand 8710 states and 38697 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:08,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:08,454 INFO L93 Difference]: Finished difference Result 9504 states and 41867 transitions. [2021-07-13 19:59:08,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:59:08,454 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:08,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:08,483 INFO L225 Difference]: With dead ends: 9504 [2021-07-13 19:59:08,483 INFO L226 Difference]: Without dead ends: 9476 [2021-07-13 19:59:08,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1169.4ms TimeCoverageRelationStatistics Valid=257, Invalid=1813, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:59:08,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9476 states. [2021-07-13 19:59:08,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9476 to 8698. [2021-07-13 19:59:08,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8698 states, 8697 states have (on average 4.443831206163045) internal successors, (38648), 8697 states have internal predecessors, (38648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8698 states to 8698 states and 38648 transitions. [2021-07-13 19:59:08,648 INFO L78 Accepts]: Start accepts. Automaton has 8698 states and 38648 transitions. Word has length 33 [2021-07-13 19:59:08,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:08,648 INFO L482 AbstractCegarLoop]: Abstraction has 8698 states and 38648 transitions. [2021-07-13 19:59:08,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:08,649 INFO L276 IsEmpty]: Start isEmpty. Operand 8698 states and 38648 transitions. [2021-07-13 19:59:08,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:08,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:08,666 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:08,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:08,867 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:08,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:08,867 INFO L82 PathProgramCache]: Analyzing trace with hash 2108014974, now seen corresponding path program 144 times [2021-07-13 19:59:08,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:08,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336929518] [2021-07-13 19:59:08,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:09,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:09,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336929518] [2021-07-13 19:59:09,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336929518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:09,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620206747] [2021-07-13 19:59:09,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:09,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:59:09,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:09,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:09,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:09,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:09,215 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:59:09,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-07-13 19:59:09,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:59:09,245 INFO L628 ElimStorePlain]: treesize reduction 84, result has 20.8 percent of original size [2021-07-13 19:59:09,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:09,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-13 19:59:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:09,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620206747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:09,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:09,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 19:59:09,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435830700] [2021-07-13 19:59:09,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:59:09,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:09,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:59:09,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:59:09,356 INFO L87 Difference]: Start difference. First operand 8698 states and 38648 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:10,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:10,761 INFO L93 Difference]: Finished difference Result 9881 states and 43187 transitions. [2021-07-13 19:59:10,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 19:59:10,761 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:10,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:10,790 INFO L225 Difference]: With dead ends: 9881 [2021-07-13 19:59:10,790 INFO L226 Difference]: Without dead ends: 9867 [2021-07-13 19:59:10,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1015.8ms TimeCoverageRelationStatistics Valid=361, Invalid=2395, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:59:10,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9867 states. [2021-07-13 19:59:10,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9867 to 8807. [2021-07-13 19:59:10,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8807 states, 8806 states have (on average 4.445832387008857) internal successors, (39150), 8806 states have internal predecessors, (39150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8807 states to 8807 states and 39150 transitions. [2021-07-13 19:59:10,965 INFO L78 Accepts]: Start accepts. Automaton has 8807 states and 39150 transitions. Word has length 33 [2021-07-13 19:59:10,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:10,965 INFO L482 AbstractCegarLoop]: Abstraction has 8807 states and 39150 transitions. [2021-07-13 19:59:10,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:10,965 INFO L276 IsEmpty]: Start isEmpty. Operand 8807 states and 39150 transitions. [2021-07-13 19:59:10,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:10,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:10,982 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:11,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2021-07-13 19:59:11,183 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:11,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:11,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1096448042, now seen corresponding path program 145 times [2021-07-13 19:59:11,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:11,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422518938] [2021-07-13 19:59:11,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:11,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:11,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422518938] [2021-07-13 19:59:11,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422518938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:11,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948428515] [2021-07-13 19:59:11,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:11,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:11,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:11,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:11,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 19:59:11,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:11,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:11,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:11,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 19:59:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:11,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948428515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:11,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:11,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:59:11,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375287181] [2021-07-13 19:59:11,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:59:11,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:11,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:59:11,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:59:11,626 INFO L87 Difference]: Start difference. First operand 8807 states and 39150 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:12,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:12,597 INFO L93 Difference]: Finished difference Result 10513 states and 45574 transitions. [2021-07-13 19:59:12,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:59:12,598 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:12,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:12,628 INFO L225 Difference]: With dead ends: 10513 [2021-07-13 19:59:12,628 INFO L226 Difference]: Without dead ends: 10489 [2021-07-13 19:59:12,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 788.7ms TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:59:12,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10489 states. [2021-07-13 19:59:12,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10489 to 8904. [2021-07-13 19:59:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8904 states, 8903 states have (on average 4.451533191059194) internal successors, (39632), 8903 states have internal predecessors, (39632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:12,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8904 states to 8904 states and 39632 transitions. [2021-07-13 19:59:12,832 INFO L78 Accepts]: Start accepts. Automaton has 8904 states and 39632 transitions. Word has length 33 [2021-07-13 19:59:12,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:12,832 INFO L482 AbstractCegarLoop]: Abstraction has 8904 states and 39632 transitions. [2021-07-13 19:59:12,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:12,833 INFO L276 IsEmpty]: Start isEmpty. Operand 8904 states and 39632 transitions. [2021-07-13 19:59:12,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:12,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:12,850 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:13,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-07-13 19:59:13,051 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:13,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:13,051 INFO L82 PathProgramCache]: Analyzing trace with hash -571945400, now seen corresponding path program 146 times [2021-07-13 19:59:13,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:13,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106066342] [2021-07-13 19:59:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:13,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:13,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106066342] [2021-07-13 19:59:13,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106066342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:13,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765502612] [2021-07-13 19:59:13,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:13,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:13,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:13,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 19:59:13,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:13,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:13,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-07-13 19:59:13,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:13,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:13,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:13,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:30 [2021-07-13 19:59:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:13,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765502612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:13,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:13,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-13 19:59:13,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198190416] [2021-07-13 19:59:13,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:59:13,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:13,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:59:13,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:59:13,537 INFO L87 Difference]: Start difference. First operand 8904 states and 39632 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:14,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:14,514 INFO L93 Difference]: Finished difference Result 9740 states and 42844 transitions. [2021-07-13 19:59:14,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:59:14,514 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:14,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:14,543 INFO L225 Difference]: With dead ends: 9740 [2021-07-13 19:59:14,543 INFO L226 Difference]: Without dead ends: 9717 [2021-07-13 19:59:14,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 811.7ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:59:14,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9717 states. [2021-07-13 19:59:14,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9717 to 8864. [2021-07-13 19:59:14,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.453571025612095) internal successors, (39472), 8863 states have internal predecessors, (39472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:14,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 39472 transitions. [2021-07-13 19:59:14,725 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 39472 transitions. Word has length 33 [2021-07-13 19:59:14,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:14,725 INFO L482 AbstractCegarLoop]: Abstraction has 8864 states and 39472 transitions. [2021-07-13 19:59:14,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:14,726 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 39472 transitions. [2021-07-13 19:59:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:14,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:14,743 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:14,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:14,944 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:14,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:14,944 INFO L82 PathProgramCache]: Analyzing trace with hash -719490802, now seen corresponding path program 147 times [2021-07-13 19:59:14,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:14,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232191361] [2021-07-13 19:59:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:15,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:15,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232191361] [2021-07-13 19:59:15,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232191361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:15,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986986786] [2021-07-13 19:59:15,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:15,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:59:15,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:15,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 19:59:15,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:15,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:59:15,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:15,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:15,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:15,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:18 [2021-07-13 19:59:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:15,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986986786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:15,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:15,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-13 19:59:15,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810763459] [2021-07-13 19:59:15,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:59:15,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:15,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:59:15,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:59:15,411 INFO L87 Difference]: Start difference. First operand 8864 states and 39472 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:16,681 INFO L93 Difference]: Finished difference Result 10230 states and 44560 transitions. [2021-07-13 19:59:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 19:59:16,682 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:16,713 INFO L225 Difference]: With dead ends: 10230 [2021-07-13 19:59:16,713 INFO L226 Difference]: Without dead ends: 10171 [2021-07-13 19:59:16,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1014.8ms TimeCoverageRelationStatistics Valid=371, Invalid=2385, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:59:16,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10171 states. [2021-07-13 19:59:16,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10171 to 8861. [2021-07-13 19:59:16,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8861 states, 8860 states have (on average 4.453611738148984) internal successors, (39459), 8860 states have internal predecessors, (39459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:16,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8861 states to 8861 states and 39459 transitions. [2021-07-13 19:59:16,957 INFO L78 Accepts]: Start accepts. Automaton has 8861 states and 39459 transitions. Word has length 33 [2021-07-13 19:59:16,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:16,957 INFO L482 AbstractCegarLoop]: Abstraction has 8861 states and 39459 transitions. [2021-07-13 19:59:16,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:16,958 INFO L276 IsEmpty]: Start isEmpty. Operand 8861 states and 39459 transitions. [2021-07-13 19:59:16,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:16,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:16,975 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:17,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-07-13 19:59:17,175 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:17,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:17,176 INFO L82 PathProgramCache]: Analyzing trace with hash -294598488, now seen corresponding path program 148 times [2021-07-13 19:59:17,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:17,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802617361] [2021-07-13 19:59:17,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:17,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:17,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802617361] [2021-07-13 19:59:17,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802617361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:17,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375341146] [2021-07-13 19:59:17,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:17,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:17,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:17,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:17,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:17,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:17,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 19:59:17,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:17,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:17,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:17,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 19:59:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:17,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375341146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:17,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:17,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:59:17,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565813746] [2021-07-13 19:59:17,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:59:17,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:17,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:59:17,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:59:17,598 INFO L87 Difference]: Start difference. First operand 8861 states and 39459 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:18,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:18,997 INFO L93 Difference]: Finished difference Result 10445 states and 45680 transitions. [2021-07-13 19:59:18,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:59:18,998 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:18,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:19,028 INFO L225 Difference]: With dead ends: 10445 [2021-07-13 19:59:19,028 INFO L226 Difference]: Without dead ends: 10415 [2021-07-13 19:59:19,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 984.4ms TimeCoverageRelationStatistics Valid=271, Invalid=2179, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:59:19,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10415 states. [2021-07-13 19:59:19,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10415 to 8858. [2021-07-13 19:59:19,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8858 states, 8857 states have (on average 4.454217003500056) internal successors, (39451), 8857 states have internal predecessors, (39451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:19,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8858 states to 8858 states and 39451 transitions. [2021-07-13 19:59:19,293 INFO L78 Accepts]: Start accepts. Automaton has 8858 states and 39451 transitions. Word has length 33 [2021-07-13 19:59:19,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:19,293 INFO L482 AbstractCegarLoop]: Abstraction has 8858 states and 39451 transitions. [2021-07-13 19:59:19,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:19,293 INFO L276 IsEmpty]: Start isEmpty. Operand 8858 states and 39451 transitions. [2021-07-13 19:59:19,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:19,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:19,313 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:19,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:19,514 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:19,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:19,514 INFO L82 PathProgramCache]: Analyzing trace with hash -237664702, now seen corresponding path program 149 times [2021-07-13 19:59:19,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:19,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807894577] [2021-07-13 19:59:19,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:19,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:19,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807894577] [2021-07-13 19:59:19,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807894577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:19,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002245305] [2021-07-13 19:59:19,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:19,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:59:19,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:19,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:19,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:19,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:19,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 19:59:19,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:19,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:19,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:19,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 19:59:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:19,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002245305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:19,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:19,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:59:19,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821321675] [2021-07-13 19:59:19,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:59:19,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:19,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:59:19,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:59:19,920 INFO L87 Difference]: Start difference. First operand 8858 states and 39451 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:20,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:20,878 INFO L93 Difference]: Finished difference Result 9976 states and 43691 transitions. [2021-07-13 19:59:20,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:59:20,878 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:20,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:20,907 INFO L225 Difference]: With dead ends: 9976 [2021-07-13 19:59:20,907 INFO L226 Difference]: Without dead ends: 9943 [2021-07-13 19:59:20,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 784.8ms TimeCoverageRelationStatistics Valid=333, Invalid=1389, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:59:20,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9943 states. [2021-07-13 19:59:21,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9943 to 8904. [2021-07-13 19:59:21,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8904 states, 8903 states have (on average 4.459171065932831) internal successors, (39700), 8903 states have internal predecessors, (39700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8904 states to 8904 states and 39700 transitions. [2021-07-13 19:59:21,092 INFO L78 Accepts]: Start accepts. Automaton has 8904 states and 39700 transitions. Word has length 33 [2021-07-13 19:59:21,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:21,093 INFO L482 AbstractCegarLoop]: Abstraction has 8904 states and 39700 transitions. [2021-07-13 19:59:21,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:21,093 INFO L276 IsEmpty]: Start isEmpty. Operand 8904 states and 39700 transitions. [2021-07-13 19:59:21,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:21,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:21,111 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:21,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-07-13 19:59:21,312 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:21,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:21,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1207935470, now seen corresponding path program 150 times [2021-07-13 19:59:21,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:21,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891131976] [2021-07-13 19:59:21,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:21,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:21,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891131976] [2021-07-13 19:59:21,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891131976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:21,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007698566] [2021-07-13 19:59:21,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:21,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:59:21,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:21,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:21,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:21,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:21,772 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:59:21,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 19:59:21,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:21,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:21,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:21,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-07-13 19:59:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:21,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007698566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:21,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:21,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:59:21,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488883999] [2021-07-13 19:59:21,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:59:21,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:21,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:59:21,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:59:21,987 INFO L87 Difference]: Start difference. First operand 8904 states and 39700 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:23,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:23,537 INFO L93 Difference]: Finished difference Result 9611 states and 42438 transitions. [2021-07-13 19:59:23,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:59:23,538 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:23,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:23,566 INFO L225 Difference]: With dead ends: 9611 [2021-07-13 19:59:23,566 INFO L226 Difference]: Without dead ends: 9584 [2021-07-13 19:59:23,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1293.4ms TimeCoverageRelationStatistics Valid=287, Invalid=2263, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:59:23,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9584 states. [2021-07-13 19:59:23,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9584 to 8922. [2021-07-13 19:59:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8922 states, 8921 states have (on average 4.460486492545678) internal successors, (39792), 8921 states have internal predecessors, (39792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:23,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8922 states to 8922 states and 39792 transitions. [2021-07-13 19:59:23,818 INFO L78 Accepts]: Start accepts. Automaton has 8922 states and 39792 transitions. Word has length 33 [2021-07-13 19:59:23,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:23,818 INFO L482 AbstractCegarLoop]: Abstraction has 8922 states and 39792 transitions. [2021-07-13 19:59:23,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:23,818 INFO L276 IsEmpty]: Start isEmpty. Operand 8922 states and 39792 transitions. [2021-07-13 19:59:23,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:23,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:23,836 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:24,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:24,036 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:24,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:24,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2026278078, now seen corresponding path program 151 times [2021-07-13 19:59:24,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:24,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935485353] [2021-07-13 19:59:24,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:24,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:24,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935485353] [2021-07-13 19:59:24,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935485353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:24,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877601242] [2021-07-13 19:59:24,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:24,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:24,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:24,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 19:59:24,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:24,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:24,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:24,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 19:59:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:24,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877601242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:24,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:24,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:59:24,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048242676] [2021-07-13 19:59:24,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:59:24,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:24,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:59:24,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:59:24,409 INFO L87 Difference]: Start difference. First operand 8922 states and 39792 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:25,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:25,498 INFO L93 Difference]: Finished difference Result 10339 states and 45024 transitions. [2021-07-13 19:59:25,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:59:25,499 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:25,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:25,529 INFO L225 Difference]: With dead ends: 10339 [2021-07-13 19:59:25,529 INFO L226 Difference]: Without dead ends: 10294 [2021-07-13 19:59:25,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 848.7ms TimeCoverageRelationStatistics Valid=357, Invalid=1535, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:59:25,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10294 states. [2021-07-13 19:59:25,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10294 to 8921. [2021-07-13 19:59:25,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8921 states, 8920 states have (on average 4.464349775784753) internal successors, (39822), 8920 states have internal predecessors, (39822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:25,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8921 states to 8921 states and 39822 transitions. [2021-07-13 19:59:25,721 INFO L78 Accepts]: Start accepts. Automaton has 8921 states and 39822 transitions. Word has length 33 [2021-07-13 19:59:25,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:25,721 INFO L482 AbstractCegarLoop]: Abstraction has 8921 states and 39822 transitions. [2021-07-13 19:59:25,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:25,721 INFO L276 IsEmpty]: Start isEmpty. Operand 8921 states and 39822 transitions. [2021-07-13 19:59:25,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:25,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:25,740 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:25,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2021-07-13 19:59:25,941 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:25,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:25,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1975808804, now seen corresponding path program 152 times [2021-07-13 19:59:25,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:25,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297594696] [2021-07-13 19:59:25,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:26,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:26,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297594696] [2021-07-13 19:59:26,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297594696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:26,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451053045] [2021-07-13 19:59:26,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:26,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:26,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:26,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:26,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:26,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:26,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-13 19:59:26,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:26,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:26,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:26,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-13 19:59:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:26,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451053045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:26,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:26,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 19:59:26,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727985307] [2021-07-13 19:59:26,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:59:26,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:26,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:59:26,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:59:26,490 INFO L87 Difference]: Start difference. First operand 8921 states and 39822 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:27,751 INFO L93 Difference]: Finished difference Result 9531 states and 42253 transitions. [2021-07-13 19:59:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:59:27,751 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:27,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:27,781 INFO L225 Difference]: With dead ends: 9531 [2021-07-13 19:59:27,781 INFO L226 Difference]: Without dead ends: 9518 [2021-07-13 19:59:27,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 1119.9ms TimeCoverageRelationStatistics Valid=311, Invalid=1581, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:59:27,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9518 states. [2021-07-13 19:59:27,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9518 to 8906. [2021-07-13 19:59:27,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8906 states, 8905 states have (on average 4.465244244806288) internal successors, (39763), 8905 states have internal predecessors, (39763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:27,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8906 states to 8906 states and 39763 transitions. [2021-07-13 19:59:27,957 INFO L78 Accepts]: Start accepts. Automaton has 8906 states and 39763 transitions. Word has length 33 [2021-07-13 19:59:27,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:27,957 INFO L482 AbstractCegarLoop]: Abstraction has 8906 states and 39763 transitions. [2021-07-13 19:59:27,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:27,958 INFO L276 IsEmpty]: Start isEmpty. Operand 8906 states and 39763 transitions. [2021-07-13 19:59:27,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:27,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:27,975 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:28,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-07-13 19:59:28,176 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:28,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:28,176 INFO L82 PathProgramCache]: Analyzing trace with hash -553077526, now seen corresponding path program 153 times [2021-07-13 19:59:28,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:28,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675685635] [2021-07-13 19:59:28,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:28,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:28,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675685635] [2021-07-13 19:59:28,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675685635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:28,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040809617] [2021-07-13 19:59:28,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:28,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:59:28,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:28,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:28,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:28,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:28,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 19:59:28,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:28,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:28,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:28,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 19:59:28,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:28,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040809617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:28,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:28,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 19:59:28,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079798205] [2021-07-13 19:59:28,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:59:28,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:28,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:59:28,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:59:28,718 INFO L87 Difference]: Start difference. First operand 8906 states and 39763 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:30,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:30,084 INFO L93 Difference]: Finished difference Result 9479 states and 41946 transitions. [2021-07-13 19:59:30,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:59:30,084 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:30,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:30,112 INFO L225 Difference]: With dead ends: 9479 [2021-07-13 19:59:30,112 INFO L226 Difference]: Without dead ends: 9462 [2021-07-13 19:59:30,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1288.9ms TimeCoverageRelationStatistics Valid=422, Invalid=1834, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:59:30,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9462 states. [2021-07-13 19:59:30,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9462 to 8915. [2021-07-13 19:59:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8915 states, 8914 states have (on average 4.463316131927305) internal successors, (39786), 8914 states have internal predecessors, (39786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:30,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8915 states to 8915 states and 39786 transitions. [2021-07-13 19:59:30,284 INFO L78 Accepts]: Start accepts. Automaton has 8915 states and 39786 transitions. Word has length 33 [2021-07-13 19:59:30,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:30,284 INFO L482 AbstractCegarLoop]: Abstraction has 8915 states and 39786 transitions. [2021-07-13 19:59:30,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:30,284 INFO L276 IsEmpty]: Start isEmpty. Operand 8915 states and 39786 transitions. [2021-07-13 19:59:30,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:30,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:30,302 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:30,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-07-13 19:59:30,502 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:30,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:30,503 INFO L82 PathProgramCache]: Analyzing trace with hash -606464046, now seen corresponding path program 154 times [2021-07-13 19:59:30,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:30,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233661537] [2021-07-13 19:59:30,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:30,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:30,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233661537] [2021-07-13 19:59:30,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233661537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:30,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132797233] [2021-07-13 19:59:30,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:30,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:30,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:30,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:30,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:30,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 19:59:30,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:30,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:30,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:30,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 19:59:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:31,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132797233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:31,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:31,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:59:31,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377916583] [2021-07-13 19:59:31,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:59:31,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:31,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:59:31,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:59:31,012 INFO L87 Difference]: Start difference. First operand 8915 states and 39786 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:33,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:33,101 INFO L93 Difference]: Finished difference Result 10812 states and 46519 transitions. [2021-07-13 19:59:33,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 19:59:33,101 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:33,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:33,132 INFO L225 Difference]: With dead ends: 10812 [2021-07-13 19:59:33,132 INFO L226 Difference]: Without dead ends: 10751 [2021-07-13 19:59:33,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 1927.1ms TimeCoverageRelationStatistics Valid=583, Invalid=2497, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:59:33,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10751 states. [2021-07-13 19:59:33,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10751 to 8993. [2021-07-13 19:59:33,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8993 states, 8992 states have (on average 4.47153024911032) internal successors, (40208), 8992 states have internal predecessors, (40208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:33,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8993 states to 8993 states and 40208 transitions. [2021-07-13 19:59:33,354 INFO L78 Accepts]: Start accepts. Automaton has 8993 states and 40208 transitions. Word has length 33 [2021-07-13 19:59:33,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:33,354 INFO L482 AbstractCegarLoop]: Abstraction has 8993 states and 40208 transitions. [2021-07-13 19:59:33,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:33,354 INFO L276 IsEmpty]: Start isEmpty. Operand 8993 states and 40208 transitions. [2021-07-13 19:59:33,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:33,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:33,374 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:33,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-07-13 19:59:33,574 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:33,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:33,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1456365050, now seen corresponding path program 155 times [2021-07-13 19:59:33,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:33,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540632884] [2021-07-13 19:59:33,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:33,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:33,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540632884] [2021-07-13 19:59:33,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540632884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:33,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55741553] [2021-07-13 19:59:33,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:33,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:59:33,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:33,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:33,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:33,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:59:33,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:33,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:33,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:33,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 19:59:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:34,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55741553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:34,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:34,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:59:34,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911498759] [2021-07-13 19:59:34,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:59:34,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:34,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:59:34,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:59:34,016 INFO L87 Difference]: Start difference. First operand 8993 states and 40208 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:34,963 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-07-13 19:59:36,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:36,960 INFO L93 Difference]: Finished difference Result 10544 states and 45837 transitions. [2021-07-13 19:59:36,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:59:36,960 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:36,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:36,994 INFO L225 Difference]: With dead ends: 10544 [2021-07-13 19:59:36,994 INFO L226 Difference]: Without dead ends: 10486 [2021-07-13 19:59:36,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 2523.3ms TimeCoverageRelationStatistics Valid=528, Invalid=3132, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 19:59:37,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10486 states. [2021-07-13 19:59:37,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10486 to 8990. [2021-07-13 19:59:37,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8990 states, 8989 states have (on average 4.472021359439315) internal successors, (40199), 8989 states have internal predecessors, (40199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:37,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8990 states to 8990 states and 40199 transitions. [2021-07-13 19:59:37,214 INFO L78 Accepts]: Start accepts. Automaton has 8990 states and 40199 transitions. Word has length 33 [2021-07-13 19:59:37,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:37,214 INFO L482 AbstractCegarLoop]: Abstraction has 8990 states and 40199 transitions. [2021-07-13 19:59:37,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:37,214 INFO L276 IsEmpty]: Start isEmpty. Operand 8990 states and 40199 transitions. [2021-07-13 19:59:37,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:37,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:37,236 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:37,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-07-13 19:59:37,443 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:37,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:37,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1103225560, now seen corresponding path program 156 times [2021-07-13 19:59:37,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:37,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494392132] [2021-07-13 19:59:37,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:37,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:37,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494392132] [2021-07-13 19:59:37,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494392132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:37,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235088377] [2021-07-13 19:59:37,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:37,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:59:37,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:37,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:37,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:37,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:37,857 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 19:59:37,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 19:59:37,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:37,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:37,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:37,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-07-13 19:59:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:38,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235088377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:38,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:38,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:59:38,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606195172] [2021-07-13 19:59:38,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:59:38,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:38,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:59:38,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:59:38,043 INFO L87 Difference]: Start difference. First operand 8990 states and 40199 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:38,174 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-07-13 19:59:39,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:39,964 INFO L93 Difference]: Finished difference Result 9552 states and 42282 transitions. [2021-07-13 19:59:39,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:59:39,964 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:39,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:39,992 INFO L225 Difference]: With dead ends: 9552 [2021-07-13 19:59:39,992 INFO L226 Difference]: Without dead ends: 9506 [2021-07-13 19:59:39,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1751.2ms TimeCoverageRelationStatistics Valid=342, Invalid=2010, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:59:40,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9506 states. [2021-07-13 19:59:40,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9506 to 8996. [2021-07-13 19:59:40,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8996 states, 8995 states have (on average 4.470372429127293) internal successors, (40211), 8995 states have internal predecessors, (40211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8996 states to 8996 states and 40211 transitions. [2021-07-13 19:59:40,177 INFO L78 Accepts]: Start accepts. Automaton has 8996 states and 40211 transitions. Word has length 33 [2021-07-13 19:59:40,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:40,177 INFO L482 AbstractCegarLoop]: Abstraction has 8996 states and 40211 transitions. [2021-07-13 19:59:40,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:40,177 INFO L276 IsEmpty]: Start isEmpty. Operand 8996 states and 40211 transitions. [2021-07-13 19:59:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:40,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:40,196 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:40,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-07-13 19:59:40,396 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:40,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:40,396 INFO L82 PathProgramCache]: Analyzing trace with hash 914383994, now seen corresponding path program 157 times [2021-07-13 19:59:40,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:40,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829284935] [2021-07-13 19:59:40,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:40,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:40,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829284935] [2021-07-13 19:59:40,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829284935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:40,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840558682] [2021-07-13 19:59:40,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:40,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:40,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:40,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:59:40,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:40,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:40,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:40,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 19:59:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:40,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840558682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:40,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:40,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:59:40,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194797940] [2021-07-13 19:59:40,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:59:40,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:40,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:59:40,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:59:40,892 INFO L87 Difference]: Start difference. First operand 8996 states and 40211 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:43,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:43,000 INFO L93 Difference]: Finished difference Result 9838 states and 43435 transitions. [2021-07-13 19:59:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:59:43,001 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:43,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:43,029 INFO L225 Difference]: With dead ends: 9838 [2021-07-13 19:59:43,029 INFO L226 Difference]: Without dead ends: 9800 [2021-07-13 19:59:43,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1777.0ms TimeCoverageRelationStatistics Valid=552, Invalid=2754, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 19:59:43,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9800 states. [2021-07-13 19:59:43,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9800 to 8984. [2021-07-13 19:59:43,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8984 states, 8983 states have (on average 4.472002671713236) internal successors, (40172), 8983 states have internal predecessors, (40172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8984 states to 8984 states and 40172 transitions. [2021-07-13 19:59:43,228 INFO L78 Accepts]: Start accepts. Automaton has 8984 states and 40172 transitions. Word has length 33 [2021-07-13 19:59:43,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:43,228 INFO L482 AbstractCegarLoop]: Abstraction has 8984 states and 40172 transitions. [2021-07-13 19:59:43,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand 8984 states and 40172 transitions. [2021-07-13 19:59:43,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:43,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:43,245 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:43,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:43,446 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:43,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:43,446 INFO L82 PathProgramCache]: Analyzing trace with hash 407592648, now seen corresponding path program 158 times [2021-07-13 19:59:43,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:43,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699182535] [2021-07-13 19:59:43,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:43,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:43,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699182535] [2021-07-13 19:59:43,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699182535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:43,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486077528] [2021-07-13 19:59:43,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:43,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:43,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:43,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:43,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:43,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:43,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 19:59:43,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:43,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:43,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:43,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 19:59:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:43,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486077528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:43,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:43,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:59:43,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206362174] [2021-07-13 19:59:43,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:59:43,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:43,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:59:43,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:59:43,952 INFO L87 Difference]: Start difference. First operand 8984 states and 40172 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:45,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:45,874 INFO L93 Difference]: Finished difference Result 9957 states and 43886 transitions. [2021-07-13 19:59:45,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:59:45,875 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:45,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:45,905 INFO L225 Difference]: With dead ends: 9957 [2021-07-13 19:59:45,905 INFO L226 Difference]: Without dead ends: 9926 [2021-07-13 19:59:45,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1491.1ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:59:45,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9926 states. [2021-07-13 19:59:46,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9926 to 9045. [2021-07-13 19:59:46,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9045 states, 9044 states have (on average 4.472246793454223) internal successors, (40447), 9044 states have internal predecessors, (40447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:46,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9045 states to 9045 states and 40447 transitions. [2021-07-13 19:59:46,084 INFO L78 Accepts]: Start accepts. Automaton has 9045 states and 40447 transitions. Word has length 33 [2021-07-13 19:59:46,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:46,084 INFO L482 AbstractCegarLoop]: Abstraction has 9045 states and 40447 transitions. [2021-07-13 19:59:46,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:46,084 INFO L276 IsEmpty]: Start isEmpty. Operand 9045 states and 40447 transitions. [2021-07-13 19:59:46,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:46,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:46,101 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:46,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-07-13 19:59:46,305 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:46,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:46,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1710865254, now seen corresponding path program 159 times [2021-07-13 19:59:46,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:46,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995885259] [2021-07-13 19:59:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:46,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:46,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995885259] [2021-07-13 19:59:46,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995885259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:46,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578590358] [2021-07-13 19:59:46,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:46,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:59:46,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:46,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:46,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:46,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:46,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-13 19:59:46,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:46,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:46,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:46,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-13 19:59:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:46,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578590358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:46,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:46,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 19:59:46,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804952837] [2021-07-13 19:59:46,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:59:46,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:46,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:59:46,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:59:46,792 INFO L87 Difference]: Start difference. First operand 9045 states and 40447 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:48,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:48,315 INFO L93 Difference]: Finished difference Result 9702 states and 42878 transitions. [2021-07-13 19:59:48,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:59:48,316 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:48,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:48,345 INFO L225 Difference]: With dead ends: 9702 [2021-07-13 19:59:48,345 INFO L226 Difference]: Without dead ends: 9685 [2021-07-13 19:59:48,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1263.1ms TimeCoverageRelationStatistics Valid=378, Invalid=1602, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:59:48,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9685 states. [2021-07-13 19:59:48,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9685 to 9054. [2021-07-13 19:59:48,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9054 states, 9053 states have (on average 4.470341323318237) internal successors, (40470), 9053 states have internal predecessors, (40470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9054 states to 9054 states and 40470 transitions. [2021-07-13 19:59:48,524 INFO L78 Accepts]: Start accepts. Automaton has 9054 states and 40470 transitions. Word has length 33 [2021-07-13 19:59:48,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:48,524 INFO L482 AbstractCegarLoop]: Abstraction has 9054 states and 40470 transitions. [2021-07-13 19:59:48,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:48,524 INFO L276 IsEmpty]: Start isEmpty. Operand 9054 states and 40470 transitions. [2021-07-13 19:59:48,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:48,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:48,542 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:48,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-07-13 19:59:48,743 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:48,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:48,743 INFO L82 PathProgramCache]: Analyzing trace with hash 811503182, now seen corresponding path program 160 times [2021-07-13 19:59:48,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:48,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269273345] [2021-07-13 19:59:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:48,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:48,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269273345] [2021-07-13 19:59:48,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269273345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:48,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924777749] [2021-07-13 19:59:48,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:49,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:49,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:49,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:49,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:49,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:59:49,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:49,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:49,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:49,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 19:59:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:49,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924777749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:49,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:49,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:59:49,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387715675] [2021-07-13 19:59:49,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:59:49,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:49,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:59:49,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:59:49,195 INFO L87 Difference]: Start difference. First operand 9054 states and 40470 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:50,231 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-07-13 19:59:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:51,867 INFO L93 Difference]: Finished difference Result 10760 states and 47205 transitions. [2021-07-13 19:59:51,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 19:59:51,867 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:51,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:51,899 INFO L225 Difference]: With dead ends: 10760 [2021-07-13 19:59:51,900 INFO L226 Difference]: Without dead ends: 10714 [2021-07-13 19:59:51,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 2247.1ms TimeCoverageRelationStatistics Valid=637, Invalid=3145, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 19:59:51,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10714 states. [2021-07-13 19:59:52,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10714 to 9112. [2021-07-13 19:59:52,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9112 states, 9111 states have (on average 4.47349357918999) internal successors, (40758), 9111 states have internal predecessors, (40758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:52,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9112 states to 9112 states and 40758 transitions. [2021-07-13 19:59:52,092 INFO L78 Accepts]: Start accepts. Automaton has 9112 states and 40758 transitions. Word has length 33 [2021-07-13 19:59:52,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:52,092 INFO L482 AbstractCegarLoop]: Abstraction has 9112 states and 40758 transitions. [2021-07-13 19:59:52,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:52,093 INFO L276 IsEmpty]: Start isEmpty. Operand 9112 states and 40758 transitions. [2021-07-13 19:59:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:52,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:52,111 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:52,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-07-13 19:59:52,313 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:52,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:52,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1657478734, now seen corresponding path program 161 times [2021-07-13 19:59:52,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:52,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663620438] [2021-07-13 19:59:52,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:52,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:52,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663620438] [2021-07-13 19:59:52,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663620438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:52,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776652253] [2021-07-13 19:59:52,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:52,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:59:52,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:52,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:52,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:52,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:59:52,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:52,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:52,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:52,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 19:59:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:52,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776652253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:52,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:52,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:59:52,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942677867] [2021-07-13 19:59:52,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:59:52,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:52,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:59:52,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:59:52,848 INFO L87 Difference]: Start difference. First operand 9112 states and 40758 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:54,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:54,895 INFO L93 Difference]: Finished difference Result 11088 states and 47707 transitions. [2021-07-13 19:59:54,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:59:54,895 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:54,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:54,927 INFO L225 Difference]: With dead ends: 11088 [2021-07-13 19:59:54,927 INFO L226 Difference]: Without dead ends: 10991 [2021-07-13 19:59:54,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 1801.2ms TimeCoverageRelationStatistics Valid=563, Invalid=2407, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 19:59:54,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10991 states. [2021-07-13 19:59:55,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10991 to 9100. [2021-07-13 19:59:55,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9100 states, 9099 states have (on average 4.475546763380591) internal successors, (40723), 9099 states have internal predecessors, (40723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:55,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9100 states to 9100 states and 40723 transitions. [2021-07-13 19:59:55,155 INFO L78 Accepts]: Start accepts. Automaton has 9100 states and 40723 transitions. Word has length 33 [2021-07-13 19:59:55,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:55,155 INFO L482 AbstractCegarLoop]: Abstraction has 9100 states and 40723 transitions. [2021-07-13 19:59:55,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:55,155 INFO L276 IsEmpty]: Start isEmpty. Operand 9100 states and 40723 transitions. [2021-07-13 19:59:55,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:55,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:55,173 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:55,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:55,374 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:55,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:55,374 INFO L82 PathProgramCache]: Analyzing trace with hash 926824968, now seen corresponding path program 162 times [2021-07-13 19:59:55,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:55,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957235484] [2021-07-13 19:59:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:55,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:55,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957235484] [2021-07-13 19:59:55,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957235484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:55,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121422300] [2021-07-13 19:59:55,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:55,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:59:55,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:55,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:55,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:55,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:55,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 19:59:55,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:55,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:55,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:55,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 19:59:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:55,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121422300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:55,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:55,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:59:55,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852429876] [2021-07-13 19:59:55,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:59:55,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:55,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:59:55,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:59:55,898 INFO L87 Difference]: Start difference. First operand 9100 states and 40723 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:57,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:57,593 INFO L93 Difference]: Finished difference Result 9971 states and 44277 transitions. [2021-07-13 19:59:57,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:59:57,594 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:57,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:57,623 INFO L225 Difference]: With dead ends: 9971 [2021-07-13 19:59:57,623 INFO L226 Difference]: Without dead ends: 9919 [2021-07-13 19:59:57,623 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1288.6ms TimeCoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:59:57,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9919 states. [2021-07-13 19:59:57,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9919 to 9085. [2021-07-13 19:59:57,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9085 states, 9084 states have (on average 4.477542932628798) internal successors, (40674), 9084 states have internal predecessors, (40674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:57,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9085 states to 9085 states and 40674 transitions. [2021-07-13 19:59:57,799 INFO L78 Accepts]: Start accepts. Automaton has 9085 states and 40674 transitions. Word has length 33 [2021-07-13 19:59:57,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:57,799 INFO L482 AbstractCegarLoop]: Abstraction has 9085 states and 40674 transitions. [2021-07-13 19:59:57,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:57,800 INFO L276 IsEmpty]: Start isEmpty. Operand 9085 states and 40674 transitions. [2021-07-13 19:59:57,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:57,818 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:57,818 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:58,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-07-13 19:59:58,018 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:58,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:58,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1452593824, now seen corresponding path program 163 times [2021-07-13 19:59:58,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:58,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503850735] [2021-07-13 19:59:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:58,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:58,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503850735] [2021-07-13 19:59:58,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503850735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:58,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128717250] [2021-07-13 19:59:58,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:58,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:59:58,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:58,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:59:58,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:58,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:58,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:58,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-13 19:59:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:58,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128717250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:58,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:58,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:59:58,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164753094] [2021-07-13 19:59:58,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:59:58,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:58,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:59:58,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:59:58,395 INFO L87 Difference]: Start difference. First operand 9085 states and 40674 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:00,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:00,046 INFO L93 Difference]: Finished difference Result 10896 states and 47670 transitions. [2021-07-13 20:00:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:00:00,047 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:00,079 INFO L225 Difference]: With dead ends: 10896 [2021-07-13 20:00:00,079 INFO L226 Difference]: Without dead ends: 10834 [2021-07-13 20:00:00,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1204.8ms TimeCoverageRelationStatistics Valid=427, Invalid=2653, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:00:00,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2021-07-13 20:00:00,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 9270. [2021-07-13 20:00:00,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9270 states, 9269 states have (on average 4.479879167116194) internal successors, (41524), 9269 states have internal predecessors, (41524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:00,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9270 states to 9270 states and 41524 transitions. [2021-07-13 20:00:00,275 INFO L78 Accepts]: Start accepts. Automaton has 9270 states and 41524 transitions. Word has length 33 [2021-07-13 20:00:00,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:00,275 INFO L482 AbstractCegarLoop]: Abstraction has 9270 states and 41524 transitions. [2021-07-13 20:00:00,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:00,276 INFO L276 IsEmpty]: Start isEmpty. Operand 9270 states and 41524 transitions. [2021-07-13 20:00:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:00,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:00,294 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:00,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:00,495 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:00,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:00,495 INFO L82 PathProgramCache]: Analyzing trace with hash -149321218, now seen corresponding path program 164 times [2021-07-13 20:00:00,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:00,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627888842] [2021-07-13 20:00:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:00,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:00,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627888842] [2021-07-13 20:00:00,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627888842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:00,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092297454] [2021-07-13 20:00:00,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:00,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:00:00,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:00,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:00:00,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:00,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:00,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 20:00:00,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:00,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:00,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:00,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-13 20:00:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:01,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092297454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:01,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:01,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:00:01,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748068696] [2021-07-13 20:00:01,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:00:01,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:01,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:00:01,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:00:01,036 INFO L87 Difference]: Start difference. First operand 9270 states and 41524 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:02,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:02,359 INFO L93 Difference]: Finished difference Result 10145 states and 44797 transitions. [2021-07-13 20:00:02,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:00:02,360 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:02,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:02,393 INFO L225 Difference]: With dead ends: 10145 [2021-07-13 20:00:02,394 INFO L226 Difference]: Without dead ends: 10128 [2021-07-13 20:00:02,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1090.2ms TimeCoverageRelationStatistics Valid=314, Invalid=1408, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:00:02,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10128 states. [2021-07-13 20:00:02,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10128 to 9270. [2021-07-13 20:00:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9270 states, 9269 states have (on average 4.479123961592405) internal successors, (41517), 9269 states have internal predecessors, (41517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:02,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9270 states to 9270 states and 41517 transitions. [2021-07-13 20:00:02,608 INFO L78 Accepts]: Start accepts. Automaton has 9270 states and 41517 transitions. Word has length 33 [2021-07-13 20:00:02,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:02,609 INFO L482 AbstractCegarLoop]: Abstraction has 9270 states and 41517 transitions. [2021-07-13 20:00:02,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:02,609 INFO L276 IsEmpty]: Start isEmpty. Operand 9270 states and 41517 transitions. [2021-07-13 20:00:02,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:02,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:02,627 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:02,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:02,841 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:02,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:02,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1048683290, now seen corresponding path program 165 times [2021-07-13 20:00:02,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:02,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30414797] [2021-07-13 20:00:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:03,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:03,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30414797] [2021-07-13 20:00:03,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30414797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:03,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028210508] [2021-07-13 20:00:03,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:03,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:00:03,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:03,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:00:03,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:03,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:03,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:00:03,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:03,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2021-07-13 20:00:03,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:03,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:03,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:03,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:32 [2021-07-13 20:00:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:03,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028210508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:03,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:03,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:00:03,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930345562] [2021-07-13 20:00:03,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:00:03,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:03,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:00:03,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:00:03,417 INFO L87 Difference]: Start difference. First operand 9270 states and 41517 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:03,684 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-07-13 20:00:06,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:06,851 INFO L93 Difference]: Finished difference Result 10598 states and 46439 transitions. [2021-07-13 20:00:06,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:00:06,852 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:06,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:06,883 INFO L225 Difference]: With dead ends: 10598 [2021-07-13 20:00:06,883 INFO L226 Difference]: Without dead ends: 10552 [2021-07-13 20:00:06,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 2851.8ms TimeCoverageRelationStatistics Valid=599, Invalid=4093, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:00:06,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10552 states. [2021-07-13 20:00:07,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10552 to 9361. [2021-07-13 20:00:07,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9361 states, 9360 states have (on average 4.479594017094017) internal successors, (41929), 9360 states have internal predecessors, (41929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9361 states to 9361 states and 41929 transitions. [2021-07-13 20:00:07,151 INFO L78 Accepts]: Start accepts. Automaton has 9361 states and 41929 transitions. Word has length 33 [2021-07-13 20:00:07,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:07,151 INFO L482 AbstractCegarLoop]: Abstraction has 9361 states and 41929 transitions. [2021-07-13 20:00:07,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:07,152 INFO L276 IsEmpty]: Start isEmpty. Operand 9361 states and 41929 transitions. [2021-07-13 20:00:07,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:07,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:07,170 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:07,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-07-13 20:00:07,371 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:07,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:07,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1465685704, now seen corresponding path program 166 times [2021-07-13 20:00:07,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:07,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972049583] [2021-07-13 20:00:07,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:07,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:07,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972049583] [2021-07-13 20:00:07,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972049583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:07,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539150181] [2021-07-13 20:00:07,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:07,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:00:07,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:07,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:00:07,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:07,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:07,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 20:00:07,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:07,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:07,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:07,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 20:00:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:07,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539150181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:07,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:07,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:00:07,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625786053] [2021-07-13 20:00:07,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:00:07,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:07,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:00:07,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:00:07,880 INFO L87 Difference]: Start difference. First operand 9361 states and 41929 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:08,747 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-07-13 20:00:10,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:10,280 INFO L93 Difference]: Finished difference Result 11121 states and 48607 transitions. [2021-07-13 20:00:10,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:00:10,280 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:10,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:10,320 INFO L225 Difference]: With dead ends: 11121 [2021-07-13 20:00:10,321 INFO L226 Difference]: Without dead ends: 11048 [2021-07-13 20:00:10,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1936.1ms TimeCoverageRelationStatistics Valid=591, Invalid=2949, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:00:10,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11048 states. [2021-07-13 20:00:10,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11048 to 9324. [2021-07-13 20:00:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9324 states, 9323 states have (on average 4.480639279201974) internal successors, (41773), 9323 states have internal predecessors, (41773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:10,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9324 states to 9324 states and 41773 transitions. [2021-07-13 20:00:10,587 INFO L78 Accepts]: Start accepts. Automaton has 9324 states and 41773 transitions. Word has length 33 [2021-07-13 20:00:10,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:10,588 INFO L482 AbstractCegarLoop]: Abstraction has 9324 states and 41773 transitions. [2021-07-13 20:00:10,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:10,588 INFO L276 IsEmpty]: Start isEmpty. Operand 9324 states and 41773 transitions. [2021-07-13 20:00:10,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:10,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:10,610 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:10,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-07-13 20:00:10,811 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:10,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:10,811 INFO L82 PathProgramCache]: Analyzing trace with hash -933361504, now seen corresponding path program 167 times [2021-07-13 20:00:10,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:10,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155900987] [2021-07-13 20:00:10,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:10,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:10,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155900987] [2021-07-13 20:00:10,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155900987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:10,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567855223] [2021-07-13 20:00:10,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:11,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:00:11,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:11,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:00:11,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:11,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:11,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 20:00:11,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:11,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:11,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:11,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 20:00:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:11,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567855223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:11,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:11,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:00:11,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043794220] [2021-07-13 20:00:11,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:00:11,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:11,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:00:11,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:00:11,253 INFO L87 Difference]: Start difference. First operand 9324 states and 41773 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:12,514 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-07-13 20:00:13,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:13,125 INFO L93 Difference]: Finished difference Result 10619 states and 46840 transitions. [2021-07-13 20:00:13,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:00:13,125 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:13,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:13,170 INFO L225 Difference]: With dead ends: 10619 [2021-07-13 20:00:13,170 INFO L226 Difference]: Without dead ends: 10527 [2021-07-13 20:00:13,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1376.0ms TimeCoverageRelationStatistics Valid=285, Invalid=2265, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:00:13,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10527 states. [2021-07-13 20:00:13,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10527 to 9312. [2021-07-13 20:00:13,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9312 states, 9311 states have (on average 4.4805069272903015) internal successors, (41718), 9311 states have internal predecessors, (41718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:13,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9312 states to 9312 states and 41718 transitions. [2021-07-13 20:00:13,445 INFO L78 Accepts]: Start accepts. Automaton has 9312 states and 41718 transitions. Word has length 33 [2021-07-13 20:00:13,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:13,445 INFO L482 AbstractCegarLoop]: Abstraction has 9312 states and 41718 transitions. [2021-07-13 20:00:13,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:13,445 INFO L276 IsEmpty]: Start isEmpty. Operand 9312 states and 41718 transitions. [2021-07-13 20:00:13,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:13,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:13,470 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:13,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-07-13 20:00:13,671 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:13,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:13,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1177278074, now seen corresponding path program 168 times [2021-07-13 20:00:13,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:13,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783989884] [2021-07-13 20:00:13,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:13,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:13,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783989884] [2021-07-13 20:00:13,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783989884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:13,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359787981] [2021-07-13 20:00:13,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:13,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:00:13,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:13,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:00:13,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:14,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:14,183 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:00:14,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 61 [2021-07-13 20:00:14,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:00:14,228 INFO L628 ElimStorePlain]: treesize reduction 83, result has 21.0 percent of original size [2021-07-13 20:00:14,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:14,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-07-13 20:00:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:14,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359787981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:14,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:14,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:00:14,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350836274] [2021-07-13 20:00:14,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:00:14,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:14,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:00:14,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:00:14,317 INFO L87 Difference]: Start difference. First operand 9312 states and 41718 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:15,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:15,903 INFO L93 Difference]: Finished difference Result 10057 states and 44611 transitions. [2021-07-13 20:00:15,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:00:15,903 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:15,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:15,939 INFO L225 Difference]: With dead ends: 10057 [2021-07-13 20:00:15,939 INFO L226 Difference]: Without dead ends: 10003 [2021-07-13 20:00:15,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1184.6ms TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:00:15,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10003 states. [2021-07-13 20:00:16,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10003 to 9297. [2021-07-13 20:00:16,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9297 states, 9296 states have (on average 4.48171256454389) internal successors, (41662), 9296 states have internal predecessors, (41662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:16,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9297 states to 9297 states and 41662 transitions. [2021-07-13 20:00:16,168 INFO L78 Accepts]: Start accepts. Automaton has 9297 states and 41662 transitions. Word has length 33 [2021-07-13 20:00:16,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:16,169 INFO L482 AbstractCegarLoop]: Abstraction has 9297 states and 41662 transitions. [2021-07-13 20:00:16,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:16,169 INFO L276 IsEmpty]: Start isEmpty. Operand 9297 states and 41662 transitions. [2021-07-13 20:00:16,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:16,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:16,191 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:16,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-07-13 20:00:16,392 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:16,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:16,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1294173688, now seen corresponding path program 169 times [2021-07-13 20:00:16,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:16,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411574046] [2021-07-13 20:00:16,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:16,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:16,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411574046] [2021-07-13 20:00:16,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411574046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:16,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001132674] [2021-07-13 20:00:16,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:16,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:00:16,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:16,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:16,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 20:00:16,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:16,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:16,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:16,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 20:00:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:16,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001132674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:16,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:16,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:00:16,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694529924] [2021-07-13 20:00:16,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:00:16,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:16,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:00:16,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:00:16,834 INFO L87 Difference]: Start difference. First operand 9297 states and 41662 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:19,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:19,026 INFO L93 Difference]: Finished difference Result 11538 states and 50533 transitions. [2021-07-13 20:00:19,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:00:19,026 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:19,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:19,074 INFO L225 Difference]: With dead ends: 11538 [2021-07-13 20:00:19,074 INFO L226 Difference]: Without dead ends: 11500 [2021-07-13 20:00:19,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1406.6ms TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:00:19,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11500 states. [2021-07-13 20:00:19,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11500 to 9442. [2021-07-13 20:00:19,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9442 states, 9441 states have (on average 4.487766126469654) internal successors, (42369), 9441 states have internal predecessors, (42369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:19,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9442 states to 9442 states and 42369 transitions. [2021-07-13 20:00:19,425 INFO L78 Accepts]: Start accepts. Automaton has 9442 states and 42369 transitions. Word has length 33 [2021-07-13 20:00:19,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:19,425 INFO L482 AbstractCegarLoop]: Abstraction has 9442 states and 42369 transitions. [2021-07-13 20:00:19,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:19,425 INFO L276 IsEmpty]: Start isEmpty. Operand 9442 states and 42369 transitions. [2021-07-13 20:00:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:19,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:19,452 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:19,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-07-13 20:00:19,653 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:19,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:19,653 INFO L82 PathProgramCache]: Analyzing trace with hash 9098918, now seen corresponding path program 170 times [2021-07-13 20:00:19,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:19,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405086593] [2021-07-13 20:00:19,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:19,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:19,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405086593] [2021-07-13 20:00:19,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405086593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:19,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993874612] [2021-07-13 20:00:19,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:19,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:00:19,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:19,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:00:19,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:20,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:20,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:20,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 30 [2021-07-13 20:00:20,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:20,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:20,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:20,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-07-13 20:00:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:20,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993874612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:20,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:20,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:00:20,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282485704] [2021-07-13 20:00:20,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:00:20,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:20,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:00:20,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:00:20,182 INFO L87 Difference]: Start difference. First operand 9442 states and 42369 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:21,494 INFO L93 Difference]: Finished difference Result 10301 states and 45730 transitions. [2021-07-13 20:00:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:00:21,494 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:21,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:21,534 INFO L225 Difference]: With dead ends: 10301 [2021-07-13 20:00:21,534 INFO L226 Difference]: Without dead ends: 10288 [2021-07-13 20:00:21,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 806.9ms TimeCoverageRelationStatistics Valid=228, Invalid=1332, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:00:21,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10288 states. [2021-07-13 20:00:21,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10288 to 9442. [2021-07-13 20:00:21,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9442 states, 9441 states have (on average 4.487448363520813) internal successors, (42366), 9441 states have internal predecessors, (42366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:21,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9442 states to 9442 states and 42366 transitions. [2021-07-13 20:00:21,785 INFO L78 Accepts]: Start accepts. Automaton has 9442 states and 42366 transitions. Word has length 33 [2021-07-13 20:00:21,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:21,785 INFO L482 AbstractCegarLoop]: Abstraction has 9442 states and 42366 transitions. [2021-07-13 20:00:21,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:21,785 INFO L276 IsEmpty]: Start isEmpty. Operand 9442 states and 42366 transitions. [2021-07-13 20:00:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:21,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:21,808 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:22,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable350 [2021-07-13 20:00:22,009 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:22,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:22,009 INFO L82 PathProgramCache]: Analyzing trace with hash -890263154, now seen corresponding path program 171 times [2021-07-13 20:00:22,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:22,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792264661] [2021-07-13 20:00:22,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:22,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:22,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792264661] [2021-07-13 20:00:22,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792264661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:22,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265362949] [2021-07-13 20:00:22,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:22,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:00:22,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:22,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:00:22,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:22,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:22,430 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:00:22,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-07-13 20:00:22,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:00:22,463 INFO L628 ElimStorePlain]: treesize reduction 88, result has 20.0 percent of original size [2021-07-13 20:00:22,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:22,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-13 20:00:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:22,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265362949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:22,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:22,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 20:00:22,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750922091] [2021-07-13 20:00:22,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:00:22,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:22,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:00:22,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:00:22,609 INFO L87 Difference]: Start difference. First operand 9442 states and 42366 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:24,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:24,443 INFO L93 Difference]: Finished difference Result 10776 states and 47511 transitions. [2021-07-13 20:00:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:00:24,444 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:24,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:24,482 INFO L225 Difference]: With dead ends: 10776 [2021-07-13 20:00:24,482 INFO L226 Difference]: Without dead ends: 10740 [2021-07-13 20:00:24,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1191.1ms TimeCoverageRelationStatistics Valid=310, Invalid=2446, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:00:24,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10740 states. [2021-07-13 20:00:24,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10740 to 9444. [2021-07-13 20:00:24,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9444 states, 9443 states have (on average 4.491157471142645) internal successors, (42410), 9443 states have internal predecessors, (42410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:24,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9444 states to 9444 states and 42410 transitions. [2021-07-13 20:00:24,737 INFO L78 Accepts]: Start accepts. Automaton has 9444 states and 42410 transitions. Word has length 33 [2021-07-13 20:00:24,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:24,737 INFO L482 AbstractCegarLoop]: Abstraction has 9444 states and 42410 transitions. [2021-07-13 20:00:24,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:24,737 INFO L276 IsEmpty]: Start isEmpty. Operand 9444 states and 42410 transitions. [2021-07-13 20:00:24,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:24,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:24,760 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:24,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:24,960 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:24,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:24,960 INFO L82 PathProgramCache]: Analyzing trace with hash 2018541494, now seen corresponding path program 172 times [2021-07-13 20:00:24,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:24,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665193598] [2021-07-13 20:00:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:25,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:25,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665193598] [2021-07-13 20:00:25,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665193598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:25,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571705859] [2021-07-13 20:00:25,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:25,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:00:25,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:25,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:00:25,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:25,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:25,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 20:00:25,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:25,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:25,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:25,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 20:00:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:25,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571705859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:25,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:25,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:00:25,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969929879] [2021-07-13 20:00:25,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:00:25,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:25,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:00:25,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:00:25,462 INFO L87 Difference]: Start difference. First operand 9444 states and 42410 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:27,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:27,396 INFO L93 Difference]: Finished difference Result 11277 states and 49500 transitions. [2021-07-13 20:00:27,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:00:27,397 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:27,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:27,436 INFO L225 Difference]: With dead ends: 11277 [2021-07-13 20:00:27,436 INFO L226 Difference]: Without dead ends: 11228 [2021-07-13 20:00:27,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1283.0ms TimeCoverageRelationStatistics Valid=293, Invalid=2463, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:00:27,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11228 states. [2021-07-13 20:00:27,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11228 to 9432. [2021-07-13 20:00:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9432 states, 9431 states have (on average 4.4919944862686885) internal successors, (42364), 9431 states have internal predecessors, (42364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:27,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9432 states to 9432 states and 42364 transitions. [2021-07-13 20:00:27,710 INFO L78 Accepts]: Start accepts. Automaton has 9432 states and 42364 transitions. Word has length 33 [2021-07-13 20:00:27,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:27,710 INFO L482 AbstractCegarLoop]: Abstraction has 9432 states and 42364 transitions. [2021-07-13 20:00:27,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:27,710 INFO L276 IsEmpty]: Start isEmpty. Operand 9432 states and 42364 transitions. [2021-07-13 20:00:27,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:27,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:27,731 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:27,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-07-13 20:00:27,932 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:27,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:27,932 INFO L82 PathProgramCache]: Analyzing trace with hash -200970036, now seen corresponding path program 173 times [2021-07-13 20:00:27,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:27,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254157005] [2021-07-13 20:00:27,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:28,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:28,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254157005] [2021-07-13 20:00:28,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254157005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:28,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742024957] [2021-07-13 20:00:28,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:28,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:00:28,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:28,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:00:28,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:28,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:28,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 20:00:28,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:28,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:28,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:28,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-07-13 20:00:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:28,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742024957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:28,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:28,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:00:28,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502927234] [2021-07-13 20:00:28,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:00:28,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:28,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:00:28,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:00:28,535 INFO L87 Difference]: Start difference. First operand 9432 states and 42364 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:29,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:29,796 INFO L93 Difference]: Finished difference Result 10344 states and 46104 transitions. [2021-07-13 20:00:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:00:29,796 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:29,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:29,831 INFO L225 Difference]: With dead ends: 10344 [2021-07-13 20:00:29,832 INFO L226 Difference]: Without dead ends: 10329 [2021-07-13 20:00:29,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 972.6ms TimeCoverageRelationStatistics Valid=207, Invalid=1685, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:00:29,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10329 states. [2021-07-13 20:00:30,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10329 to 9417. [2021-07-13 20:00:30,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9417 states, 9416 states have (on average 4.492353440951572) internal successors, (42300), 9416 states have internal predecessors, (42300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9417 states to 9417 states and 42300 transitions. [2021-07-13 20:00:30,065 INFO L78 Accepts]: Start accepts. Automaton has 9417 states and 42300 transitions. Word has length 33 [2021-07-13 20:00:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:30,065 INFO L482 AbstractCegarLoop]: Abstraction has 9417 states and 42300 transitions. [2021-07-13 20:00:30,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:30,065 INFO L276 IsEmpty]: Start isEmpty. Operand 9417 states and 42300 transitions. [2021-07-13 20:00:30,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:30,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:30,087 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:30,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-07-13 20:00:30,301 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:30,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:30,301 INFO L82 PathProgramCache]: Analyzing trace with hash 655113932, now seen corresponding path program 174 times [2021-07-13 20:00:30,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:30,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167729876] [2021-07-13 20:00:30,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:30,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:30,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167729876] [2021-07-13 20:00:30,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167729876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:30,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079231448] [2021-07-13 20:00:30,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:30,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:00:30,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:30,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:00:30,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:30,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:30,689 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:00:30,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 20:00:30,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:30,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:30,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:30,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-07-13 20:00:30,997 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-13 20:00:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:31,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079231448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:31,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:31,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:00:31,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693106319] [2021-07-13 20:00:31,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:00:31,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:31,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:00:31,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:00:31,014 INFO L87 Difference]: Start difference. First operand 9417 states and 42300 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:32,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:32,928 INFO L93 Difference]: Finished difference Result 10450 states and 46386 transitions. [2021-07-13 20:00:32,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:00:32,929 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:32,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:32,967 INFO L225 Difference]: With dead ends: 10450 [2021-07-13 20:00:32,967 INFO L226 Difference]: Without dead ends: 10419 [2021-07-13 20:00:32,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1475.6ms TimeCoverageRelationStatistics Valid=396, Invalid=2574, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:00:32,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10419 states. [2021-07-13 20:00:33,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10419 to 9499. [2021-07-13 20:00:33,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9499 states, 9498 states have (on average 4.49273531269741) internal successors, (42672), 9498 states have internal predecessors, (42672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9499 states to 9499 states and 42672 transitions. [2021-07-13 20:00:33,220 INFO L78 Accepts]: Start accepts. Automaton has 9499 states and 42672 transitions. Word has length 33 [2021-07-13 20:00:33,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:33,221 INFO L482 AbstractCegarLoop]: Abstraction has 9499 states and 42672 transitions. [2021-07-13 20:00:33,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 9499 states and 42672 transitions. [2021-07-13 20:00:33,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:33,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:33,325 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:33,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-07-13 20:00:33,526 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:33,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1958386538, now seen corresponding path program 175 times [2021-07-13 20:00:33,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:33,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472536859] [2021-07-13 20:00:33,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:33,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:33,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472536859] [2021-07-13 20:00:33,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472536859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:33,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515873048] [2021-07-13 20:00:33,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:33,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:00:33,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:33,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:00:33,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:33,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:33,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:33,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 20:00:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:33,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515873048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:33,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:33,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:00:33,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296630848] [2021-07-13 20:00:33,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:00:33,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:33,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:00:33,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:00:33,992 INFO L87 Difference]: Start difference. First operand 9499 states and 42672 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:35,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:35,302 INFO L93 Difference]: Finished difference Result 10963 states and 48287 transitions. [2021-07-13 20:00:35,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:00:35,303 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:35,351 INFO L225 Difference]: With dead ends: 10963 [2021-07-13 20:00:35,351 INFO L226 Difference]: Without dead ends: 10935 [2021-07-13 20:00:35,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 992.6ms TimeCoverageRelationStatistics Valid=365, Invalid=1705, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:00:35,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10935 states. [2021-07-13 20:00:35,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10935 to 9630. [2021-07-13 20:00:35,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9630 states, 9629 states have (on average 4.4952746910374906) internal successors, (43285), 9629 states have internal predecessors, (43285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:35,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9630 states to 9630 states and 43285 transitions. [2021-07-13 20:00:35,638 INFO L78 Accepts]: Start accepts. Automaton has 9630 states and 43285 transitions. Word has length 33 [2021-07-13 20:00:35,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:35,638 INFO L482 AbstractCegarLoop]: Abstraction has 9630 states and 43285 transitions. [2021-07-13 20:00:35,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:35,638 INFO L276 IsEmpty]: Start isEmpty. Operand 9630 states and 43285 transitions. [2021-07-13 20:00:35,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:35,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:35,735 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:35,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:35,935 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:35,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:35,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1905000018, now seen corresponding path program 176 times [2021-07-13 20:00:35,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:35,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173996821] [2021-07-13 20:00:35,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:36,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:36,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173996821] [2021-07-13 20:00:36,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173996821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:36,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435873139] [2021-07-13 20:00:36,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:36,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:00:36,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:36,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:00:36,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:36,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:36,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:00:36,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:36,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:36,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:36,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 20:00:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:36,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435873139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:36,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:36,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-13 20:00:36,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701897646] [2021-07-13 20:00:36,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:00:36,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:36,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:00:36,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:00:36,445 INFO L87 Difference]: Start difference. First operand 9630 states and 43285 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:36,833 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-07-13 20:00:38,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:38,355 INFO L93 Difference]: Finished difference Result 10286 states and 45812 transitions. [2021-07-13 20:00:38,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:00:38,356 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:38,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:38,402 INFO L225 Difference]: With dead ends: 10286 [2021-07-13 20:00:38,402 INFO L226 Difference]: Without dead ends: 10263 [2021-07-13 20:00:38,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1659.9ms TimeCoverageRelationStatistics Valid=424, Invalid=1738, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:00:38,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10263 states. [2021-07-13 20:00:38,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10263 to 9590. [2021-07-13 20:00:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9590 states, 9589 states have (on average 4.497340702888726) internal successors, (43125), 9589 states have internal predecessors, (43125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:38,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9590 states to 9590 states and 43125 transitions. [2021-07-13 20:00:38,678 INFO L78 Accepts]: Start accepts. Automaton has 9590 states and 43125 transitions. Word has length 33 [2021-07-13 20:00:38,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:38,678 INFO L482 AbstractCegarLoop]: Abstraction has 9590 states and 43125 transitions. [2021-07-13 20:00:38,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:38,678 INFO L276 IsEmpty]: Start isEmpty. Operand 9590 states and 43125 transitions. [2021-07-13 20:00:38,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:38,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:38,702 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:38,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:38,916 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:38,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:38,916 INFO L82 PathProgramCache]: Analyzing trace with hash -327138182, now seen corresponding path program 177 times [2021-07-13 20:00:38,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:38,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211531295] [2021-07-13 20:00:38,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:39,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:39,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:39,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211531295] [2021-07-13 20:00:39,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211531295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:39,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276401647] [2021-07-13 20:00:39,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:39,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:00:39,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:39,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:00:39,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:39,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:39,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:00:39,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:39,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:39,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:39,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 20:00:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:39,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276401647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:39,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:39,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:00:39,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709354131] [2021-07-13 20:00:39,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:00:39,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:39,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:00:39,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:00:39,537 INFO L87 Difference]: Start difference. First operand 9590 states and 43125 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:41,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:41,025 INFO L93 Difference]: Finished difference Result 10184 states and 45537 transitions. [2021-07-13 20:00:41,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:00:41,026 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:41,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:41,143 INFO L225 Difference]: With dead ends: 10184 [2021-07-13 20:00:41,143 INFO L226 Difference]: Without dead ends: 10169 [2021-07-13 20:00:41,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1197.9ms TimeCoverageRelationStatistics Valid=244, Invalid=1826, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:00:41,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10169 states. [2021-07-13 20:00:41,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10169 to 9590. [2021-07-13 20:00:41,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9590 states, 9589 states have (on average 4.497340702888726) internal successors, (43125), 9589 states have internal predecessors, (43125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:41,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9590 states to 9590 states and 43125 transitions. [2021-07-13 20:00:41,369 INFO L78 Accepts]: Start accepts. Automaton has 9590 states and 43125 transitions. Word has length 33 [2021-07-13 20:00:41,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:41,369 INFO L482 AbstractCegarLoop]: Abstraction has 9590 states and 43125 transitions. [2021-07-13 20:00:41,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:41,369 INFO L276 IsEmpty]: Start isEmpty. Operand 9590 states and 43125 transitions. [2021-07-13 20:00:41,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:41,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:41,393 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:41,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-07-13 20:00:41,593 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:41,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:41,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1757454616, now seen corresponding path program 178 times [2021-07-13 20:00:41,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:41,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447768715] [2021-07-13 20:00:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:41,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:41,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447768715] [2021-07-13 20:00:41,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447768715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:41,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147207202] [2021-07-13 20:00:41,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:41,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:00:41,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:41,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:00:41,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:41,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:00:41,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:41,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:41,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:41,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 20:00:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:41,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147207202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:41,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:41,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:00:41,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611904597] [2021-07-13 20:00:41,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:00:42,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:42,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:00:42,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:00:42,000 INFO L87 Difference]: Start difference. First operand 9590 states and 43125 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:43,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:43,386 INFO L93 Difference]: Finished difference Result 10656 states and 47208 transitions. [2021-07-13 20:00:43,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:00:43,386 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:43,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:43,492 INFO L225 Difference]: With dead ends: 10656 [2021-07-13 20:00:43,492 INFO L226 Difference]: Without dead ends: 10632 [2021-07-13 20:00:43,492 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1046.2ms TimeCoverageRelationStatistics Valid=338, Invalid=1918, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:00:43,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2021-07-13 20:00:43,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 9575. [2021-07-13 20:00:43,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9575 states, 9574 states have (on average 4.498537706287863) internal successors, (43069), 9574 states have internal predecessors, (43069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9575 states to 9575 states and 43069 transitions. [2021-07-13 20:00:43,727 INFO L78 Accepts]: Start accepts. Automaton has 9575 states and 43069 transitions. Word has length 33 [2021-07-13 20:00:43,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:43,727 INFO L482 AbstractCegarLoop]: Abstraction has 9575 states and 43069 transitions. [2021-07-13 20:00:43,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:43,727 INFO L276 IsEmpty]: Start isEmpty. Operand 9575 states and 43069 transitions. [2021-07-13 20:00:43,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:43,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:43,748 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:43,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-07-13 20:00:43,949 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:43,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:43,950 INFO L82 PathProgramCache]: Analyzing trace with hash -72637978, now seen corresponding path program 179 times [2021-07-13 20:00:43,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:43,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042226889] [2021-07-13 20:00:43,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:44,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:44,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042226889] [2021-07-13 20:00:44,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042226889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:44,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111814585] [2021-07-13 20:00:44,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:44,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:00:44,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:44,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:00:44,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:44,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:44,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:00:44,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:44,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:44,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:44,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 20:00:44,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:44,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111814585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:44,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:44,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:00:44,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113788828] [2021-07-13 20:00:44,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:00:44,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:44,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:00:44,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:00:44,369 INFO L87 Difference]: Start difference. First operand 9575 states and 43069 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:45,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:45,449 INFO L93 Difference]: Finished difference Result 10707 states and 47282 transitions. [2021-07-13 20:00:45,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:00:45,451 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:45,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:45,494 INFO L225 Difference]: With dead ends: 10707 [2021-07-13 20:00:45,494 INFO L226 Difference]: Without dead ends: 10685 [2021-07-13 20:00:45,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 853.2ms TimeCoverageRelationStatistics Valid=344, Invalid=1548, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:00:45,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10685 states. [2021-07-13 20:00:45,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10685 to 9623. [2021-07-13 20:00:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9623 states, 9622 states have (on average 4.498960715028061) internal successors, (43289), 9622 states have internal predecessors, (43289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:45,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9623 states to 9623 states and 43289 transitions. [2021-07-13 20:00:45,860 INFO L78 Accepts]: Start accepts. Automaton has 9623 states and 43289 transitions. Word has length 33 [2021-07-13 20:00:45,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:45,860 INFO L482 AbstractCegarLoop]: Abstraction has 9623 states and 43289 transitions. [2021-07-13 20:00:45,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:45,860 INFO L276 IsEmpty]: Start isEmpty. Operand 9623 states and 43289 transitions. [2021-07-13 20:00:45,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:45,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:45,889 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:46,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable367,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:46,091 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:46,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:46,092 INFO L82 PathProgramCache]: Analyzing trace with hash -126024498, now seen corresponding path program 180 times [2021-07-13 20:00:46,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:46,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508522993] [2021-07-13 20:00:46,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:46,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:46,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:46,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508522993] [2021-07-13 20:00:46,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508522993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:46,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61850339] [2021-07-13 20:00:46,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:46,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:00:46,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:46,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:00:46,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:46,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:46,460 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:00:46,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 20:00:46,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:46,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:46,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:46,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-07-13 20:00:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:46,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61850339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:46,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:46,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:00:46,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072996904] [2021-07-13 20:00:46,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:00:46,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:46,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:00:46,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:00:46,668 INFO L87 Difference]: Start difference. First operand 9623 states and 43289 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:48,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:48,321 INFO L93 Difference]: Finished difference Result 10459 states and 46480 transitions. [2021-07-13 20:00:48,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:00:48,321 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:48,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:48,359 INFO L225 Difference]: With dead ends: 10459 [2021-07-13 20:00:48,360 INFO L226 Difference]: Without dead ends: 10432 [2021-07-13 20:00:48,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1225.4ms TimeCoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:00:48,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10432 states. [2021-07-13 20:00:48,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10432 to 9599. [2021-07-13 20:00:48,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9599 states, 9598 states have (on average 4.503542404667639) internal successors, (43225), 9598 states have internal predecessors, (43225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9599 states to 9599 states and 43225 transitions. [2021-07-13 20:00:48,633 INFO L78 Accepts]: Start accepts. Automaton has 9599 states and 43225 transitions. Word has length 33 [2021-07-13 20:00:48,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:48,633 INFO L482 AbstractCegarLoop]: Abstraction has 9599 states and 43225 transitions. [2021-07-13 20:00:48,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:48,634 INFO L276 IsEmpty]: Start isEmpty. Operand 9599 states and 43225 transitions. [2021-07-13 20:00:48,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:48,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:48,661 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:48,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-07-13 20:00:48,862 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:48,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:48,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1420275688, now seen corresponding path program 181 times [2021-07-13 20:00:48,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:48,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707137843] [2021-07-13 20:00:48,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:49,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:49,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707137843] [2021-07-13 20:00:49,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707137843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:49,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471053185] [2021-07-13 20:00:49,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:49,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:49,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:00:49,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:49,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:49,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:00:49,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:49,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:49,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:49,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 20:00:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:49,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471053185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:49,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:49,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:00:49,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149641628] [2021-07-13 20:00:49,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:00:49,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:49,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:00:49,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:00:49,316 INFO L87 Difference]: Start difference. First operand 9599 states and 43225 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:50,875 INFO L93 Difference]: Finished difference Result 10782 states and 47731 transitions. [2021-07-13 20:00:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:00:50,875 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:50,924 INFO L225 Difference]: With dead ends: 10782 [2021-07-13 20:00:50,924 INFO L226 Difference]: Without dead ends: 10740 [2021-07-13 20:00:50,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1303.5ms TimeCoverageRelationStatistics Valid=393, Invalid=2057, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:00:50,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10740 states. [2021-07-13 20:00:51,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10740 to 9590. [2021-07-13 20:00:51,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9590 states, 9589 states have (on average 4.503702158723537) internal successors, (43186), 9589 states have internal predecessors, (43186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:51,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9590 states to 9590 states and 43186 transitions. [2021-07-13 20:00:51,241 INFO L78 Accepts]: Start accepts. Automaton has 9590 states and 43186 transitions. Word has length 33 [2021-07-13 20:00:51,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:51,241 INFO L482 AbstractCegarLoop]: Abstraction has 9590 states and 43186 transitions. [2021-07-13 20:00:51,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:51,241 INFO L276 IsEmpty]: Start isEmpty. Operand 9590 states and 43186 transitions. [2021-07-13 20:00:51,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:51,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:51,268 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:51,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:51,468 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:51,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:51,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1328692334, now seen corresponding path program 182 times [2021-07-13 20:00:51,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:51,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588788827] [2021-07-13 20:00:51,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:51,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:51,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588788827] [2021-07-13 20:00:51,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588788827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:51,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631727097] [2021-07-13 20:00:51,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:51,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:00:51,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:51,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:00:51,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:51,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:51,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:00:51,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:51,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:51,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:51,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 20:00:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:52,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631727097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:52,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:52,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:00:52,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279805687] [2021-07-13 20:00:52,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:00:52,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:52,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:00:52,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:00:52,047 INFO L87 Difference]: Start difference. First operand 9590 states and 43186 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:53,051 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-07-13 20:00:54,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:54,257 INFO L93 Difference]: Finished difference Result 10527 states and 46863 transitions. [2021-07-13 20:00:54,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:00:54,257 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:54,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:54,293 INFO L225 Difference]: With dead ends: 10527 [2021-07-13 20:00:54,294 INFO L226 Difference]: Without dead ends: 10496 [2021-07-13 20:00:54,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1842.5ms TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:00:54,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10496 states. [2021-07-13 20:00:54,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10496 to 9618. [2021-07-13 20:00:54,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9618 states, 9617 states have (on average 4.507226785899968) internal successors, (43346), 9617 states have internal predecessors, (43346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:54,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9618 states to 9618 states and 43346 transitions. [2021-07-13 20:00:54,541 INFO L78 Accepts]: Start accepts. Automaton has 9618 states and 43346 transitions. Word has length 33 [2021-07-13 20:00:54,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:54,541 INFO L482 AbstractCegarLoop]: Abstraction has 9618 states and 43346 transitions. [2021-07-13 20:00:54,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:54,541 INFO L276 IsEmpty]: Start isEmpty. Operand 9618 states and 43346 transitions. [2021-07-13 20:00:54,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:54,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:54,564 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:54,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable373 [2021-07-13 20:00:54,767 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:54,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:54,768 INFO L82 PathProgramCache]: Analyzing trace with hash -25419728, now seen corresponding path program 183 times [2021-07-13 20:00:54,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:54,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195901280] [2021-07-13 20:00:54,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:54,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:54,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195901280] [2021-07-13 20:00:54,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195901280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:54,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649512866] [2021-07-13 20:00:54,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:54,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:00:54,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:54,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:00:54,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:55,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:55,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:00:55,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:55,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:55,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:55,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 20:00:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:55,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649512866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:55,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:55,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:00:55,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664099712] [2021-07-13 20:00:55,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:00:55,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:55,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:00:55,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:00:55,310 INFO L87 Difference]: Start difference. First operand 9618 states and 43346 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:55,531 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-07-13 20:00:57,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:57,078 INFO L93 Difference]: Finished difference Result 10272 states and 45855 transitions. [2021-07-13 20:00:57,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:00:57,078 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:00:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:57,113 INFO L225 Difference]: With dead ends: 10272 [2021-07-13 20:00:57,113 INFO L226 Difference]: Without dead ends: 10255 [2021-07-13 20:00:57,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1514.3ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:00:57,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10255 states. [2021-07-13 20:00:57,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10255 to 9660. [2021-07-13 20:00:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9660 states, 9659 states have (on average 4.5019153121441144) internal successors, (43484), 9659 states have internal predecessors, (43484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:57,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9660 states to 9660 states and 43484 transitions. [2021-07-13 20:00:57,381 INFO L78 Accepts]: Start accepts. Automaton has 9660 states and 43484 transitions. Word has length 33 [2021-07-13 20:00:57,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:57,381 INFO L482 AbstractCegarLoop]: Abstraction has 9660 states and 43484 transitions. [2021-07-13 20:00:57,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:57,381 INFO L276 IsEmpty]: Start isEmpty. Operand 9660 states and 43484 transitions. [2021-07-13 20:00:57,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:00:57,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:57,408 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:57,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-07-13 20:00:57,608 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:57,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:57,609 INFO L82 PathProgramCache]: Analyzing trace with hash -924781800, now seen corresponding path program 184 times [2021-07-13 20:00:57,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:57,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661745065] [2021-07-13 20:00:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:57,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:57,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:57,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661745065] [2021-07-13 20:00:57,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661745065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:57,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922434773] [2021-07-13 20:00:57,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:57,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:00:57,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:57,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:00:57,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:58,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:58,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:00:58,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:58,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:58,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:58,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 20:00:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:58,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922434773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:58,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:58,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:00:58,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381716352] [2021-07-13 20:00:58,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:00:58,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:58,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:00:58,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:00:58,248 INFO L87 Difference]: Start difference. First operand 9660 states and 43484 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:58,804 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-07-13 20:00:59,638 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-07-13 20:01:01,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:01,615 INFO L93 Difference]: Finished difference Result 11445 states and 50459 transitions. [2021-07-13 20:01:01,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:01:01,615 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:01,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:01,654 INFO L225 Difference]: With dead ends: 11445 [2021-07-13 20:01:01,654 INFO L226 Difference]: Without dead ends: 11399 [2021-07-13 20:01:01,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 2861.1ms TimeCoverageRelationStatistics Valid=746, Invalid=3946, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:01:01,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11399 states. [2021-07-13 20:01:01,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11399 to 9757. [2021-07-13 20:01:01,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9757 states, 9756 states have (on average 4.504612546125461) internal successors, (43947), 9756 states have internal predecessors, (43947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9757 states to 9757 states and 43947 transitions. [2021-07-13 20:01:01,934 INFO L78 Accepts]: Start accepts. Automaton has 9757 states and 43947 transitions. Word has length 33 [2021-07-13 20:01:01,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:01,935 INFO L482 AbstractCegarLoop]: Abstraction has 9757 states and 43947 transitions. [2021-07-13 20:01:01,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:01,935 INFO L276 IsEmpty]: Start isEmpty. Operand 9757 states and 43947 transitions. [2021-07-13 20:01:01,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:01,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:01,957 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:02,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-07-13 20:01:02,157 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:02,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:02,158 INFO L82 PathProgramCache]: Analyzing trace with hash -78806248, now seen corresponding path program 185 times [2021-07-13 20:01:02,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:02,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654706177] [2021-07-13 20:01:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:02,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:02,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654706177] [2021-07-13 20:01:02,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654706177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:02,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75937036] [2021-07-13 20:01:02,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:02,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:01:02,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:02,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:02,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:02,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:01:02,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:02,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:02,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:02,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 20:01:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:02,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75937036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:02,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:02,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:01:02,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116565403] [2021-07-13 20:01:02,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:01:02,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:02,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:01:02,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:01:02,669 INFO L87 Difference]: Start difference. First operand 9757 states and 43947 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:03,670 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-07-13 20:01:05,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:05,239 INFO L93 Difference]: Finished difference Result 11662 states and 50636 transitions. [2021-07-13 20:01:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:01:05,239 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:05,289 INFO L225 Difference]: With dead ends: 11662 [2021-07-13 20:01:05,289 INFO L226 Difference]: Without dead ends: 11601 [2021-07-13 20:01:05,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 2255.4ms TimeCoverageRelationStatistics Valid=641, Invalid=2781, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:01:05,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11601 states. [2021-07-13 20:01:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11601 to 9692. [2021-07-13 20:01:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9692 states, 9691 states have (on average 4.504591889381901) internal successors, (43654), 9691 states have internal predecessors, (43654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:05,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9692 states to 9692 states and 43654 transitions. [2021-07-13 20:01:05,611 INFO L78 Accepts]: Start accepts. Automaton has 9692 states and 43654 transitions. Word has length 33 [2021-07-13 20:01:05,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:05,611 INFO L482 AbstractCegarLoop]: Abstraction has 9692 states and 43654 transitions. [2021-07-13 20:01:05,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:05,611 INFO L276 IsEmpty]: Start isEmpty. Operand 9692 states and 43654 transitions. [2021-07-13 20:01:05,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:05,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:05,637 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:05,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-13 20:01:05,838 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:05,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:05,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1984022848, now seen corresponding path program 186 times [2021-07-13 20:01:05,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:05,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100619920] [2021-07-13 20:01:05,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:06,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:06,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100619920] [2021-07-13 20:01:06,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100619920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:06,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296933023] [2021-07-13 20:01:06,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:06,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:01:06,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:06,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:06,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:06,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:06,359 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:01:06,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 20:01:06,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:06,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:06,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:06,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-07-13 20:01:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:06,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296933023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:06,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:06,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 20:01:06,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575895572] [2021-07-13 20:01:06,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:01:06,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:06,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:01:06,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:01:06,592 INFO L87 Difference]: Start difference. First operand 9692 states and 43654 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:08,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:08,612 INFO L93 Difference]: Finished difference Result 10771 states and 47275 transitions. [2021-07-13 20:01:08,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:01:08,612 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:08,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:08,648 INFO L225 Difference]: With dead ends: 10771 [2021-07-13 20:01:08,648 INFO L226 Difference]: Without dead ends: 10701 [2021-07-13 20:01:08,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1944.6ms TimeCoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:01:08,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10701 states. [2021-07-13 20:01:08,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10701 to 9677. [2021-07-13 20:01:08,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9677 states, 9676 states have (on average 4.506510954940058) internal successors, (43605), 9676 states have internal predecessors, (43605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:08,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9677 states to 9677 states and 43605 transitions. [2021-07-13 20:01:08,929 INFO L78 Accepts]: Start accepts. Automaton has 9677 states and 43605 transitions. Word has length 33 [2021-07-13 20:01:08,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:08,929 INFO L482 AbstractCegarLoop]: Abstraction has 9677 states and 43605 transitions. [2021-07-13 20:01:08,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 9677 states and 43605 transitions. [2021-07-13 20:01:08,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:08,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:08,951 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:09,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-07-13 20:01:09,151 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:09,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:09,152 INFO L82 PathProgramCache]: Analyzing trace with hash 935250446, now seen corresponding path program 187 times [2021-07-13 20:01:09,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:09,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178596493] [2021-07-13 20:01:09,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:09,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:09,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178596493] [2021-07-13 20:01:09,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178596493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:09,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773869476] [2021-07-13 20:01:09,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:09,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:09,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:09,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:09,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:01:09,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:09,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:09,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:09,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 20:01:09,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:09,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773869476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:09,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:09,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:01:09,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898197462] [2021-07-13 20:01:09,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:01:09,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:09,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:01:09,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:01:09,580 INFO L87 Difference]: Start difference. First operand 9677 states and 43605 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:11,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:11,047 INFO L93 Difference]: Finished difference Result 10880 states and 48121 transitions. [2021-07-13 20:01:11,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:01:11,047 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:11,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:11,084 INFO L225 Difference]: With dead ends: 10880 [2021-07-13 20:01:11,085 INFO L226 Difference]: Without dead ends: 10778 [2021-07-13 20:01:11,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1209.3ms TimeCoverageRelationStatistics Valid=469, Invalid=2183, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:01:11,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10778 states. [2021-07-13 20:01:11,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10778 to 9688. [2021-07-13 20:01:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9688 states, 9687 states have (on average 4.512439351708475) internal successors, (43712), 9687 states have internal predecessors, (43712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9688 states to 9688 states and 43712 transitions. [2021-07-13 20:01:11,391 INFO L78 Accepts]: Start accepts. Automaton has 9688 states and 43712 transitions. Word has length 33 [2021-07-13 20:01:11,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:11,391 INFO L482 AbstractCegarLoop]: Abstraction has 9688 states and 43712 transitions. [2021-07-13 20:01:11,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand 9688 states and 43712 transitions. [2021-07-13 20:01:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:11,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:11,413 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:11,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:11,614 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:11,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:11,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1454482766, now seen corresponding path program 188 times [2021-07-13 20:01:11,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:11,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502349868] [2021-07-13 20:01:11,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:11,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:11,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502349868] [2021-07-13 20:01:11,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502349868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:11,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092819103] [2021-07-13 20:01:11,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:11,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:01:11,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:11,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:11,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:11,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:11,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:01:11,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:11,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:11,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:11,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 20:01:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:12,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092819103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:12,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:12,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:01:12,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928579900] [2021-07-13 20:01:12,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:01:12,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:12,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:01:12,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:01:12,175 INFO L87 Difference]: Start difference. First operand 9688 states and 43712 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:13,756 INFO L93 Difference]: Finished difference Result 10543 states and 47197 transitions. [2021-07-13 20:01:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:01:13,756 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:13,863 INFO L225 Difference]: With dead ends: 10543 [2021-07-13 20:01:13,864 INFO L226 Difference]: Without dead ends: 10503 [2021-07-13 20:01:13,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1289.1ms TimeCoverageRelationStatistics Valid=249, Invalid=1643, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:01:13,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10503 states. [2021-07-13 20:01:14,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10503 to 9691. [2021-07-13 20:01:14,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9691 states, 9690 states have (on average 4.511661506707946) internal successors, (43718), 9690 states have internal predecessors, (43718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:14,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9691 states to 9691 states and 43718 transitions. [2021-07-13 20:01:14,118 INFO L78 Accepts]: Start accepts. Automaton has 9691 states and 43718 transitions. Word has length 33 [2021-07-13 20:01:14,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:14,118 INFO L482 AbstractCegarLoop]: Abstraction has 9691 states and 43718 transitions. [2021-07-13 20:01:14,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:14,119 INFO L276 IsEmpty]: Start isEmpty. Operand 9691 states and 43718 transitions. [2021-07-13 20:01:14,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:14,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:14,142 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:14,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:14,343 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:14,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:14,344 INFO L82 PathProgramCache]: Analyzing trace with hash 519660336, now seen corresponding path program 189 times [2021-07-13 20:01:14,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:14,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272156802] [2021-07-13 20:01:14,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:14,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:14,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272156802] [2021-07-13 20:01:14,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272156802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:14,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739226808] [2021-07-13 20:01:14,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:14,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:01:14,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:14,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:14,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:14,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:14,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:01:14,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:14,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:14,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:14,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 20:01:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:14,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739226808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:14,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:14,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:01:14,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366966967] [2021-07-13 20:01:14,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:01:14,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:14,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:01:14,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:01:14,869 INFO L87 Difference]: Start difference. First operand 9691 states and 43718 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:16,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:16,019 INFO L93 Difference]: Finished difference Result 10141 states and 45503 transitions. [2021-07-13 20:01:16,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:01:16,020 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:16,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:16,056 INFO L225 Difference]: With dead ends: 10141 [2021-07-13 20:01:16,057 INFO L226 Difference]: Without dead ends: 10112 [2021-07-13 20:01:16,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 972.7ms TimeCoverageRelationStatistics Valid=276, Invalid=1284, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:01:16,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10112 states. [2021-07-13 20:01:16,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10112 to 9676. [2021-07-13 20:01:16,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9676 states, 9675 states have (on average 4.51359173126615) internal successors, (43669), 9675 states have internal predecessors, (43669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:16,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9676 states to 9676 states and 43669 transitions. [2021-07-13 20:01:16,348 INFO L78 Accepts]: Start accepts. Automaton has 9676 states and 43669 transitions. Word has length 33 [2021-07-13 20:01:16,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:16,348 INFO L482 AbstractCegarLoop]: Abstraction has 9676 states and 43669 transitions. [2021-07-13 20:01:16,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:16,348 INFO L276 IsEmpty]: Start isEmpty. Operand 9676 states and 43669 transitions. [2021-07-13 20:01:16,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:16,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:16,370 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:16,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-07-13 20:01:16,585 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:16,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:16,585 INFO L82 PathProgramCache]: Analyzing trace with hash 378336580, now seen corresponding path program 190 times [2021-07-13 20:01:16,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:16,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077195230] [2021-07-13 20:01:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:16,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:16,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077195230] [2021-07-13 20:01:16,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077195230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:16,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530341112] [2021-07-13 20:01:16,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:16,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:01:16,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:16,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:16,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:16,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:16,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 20:01:16,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:16,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:16,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:16,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 20:01:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:17,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530341112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:17,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:17,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:01:17,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789879529] [2021-07-13 20:01:17,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:01:17,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:17,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:01:17,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:01:17,004 INFO L87 Difference]: Start difference. First operand 9676 states and 43669 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:18,070 INFO L93 Difference]: Finished difference Result 10992 states and 48564 transitions. [2021-07-13 20:01:18,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:01:18,070 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:18,110 INFO L225 Difference]: With dead ends: 10992 [2021-07-13 20:01:18,111 INFO L226 Difference]: Without dead ends: 10952 [2021-07-13 20:01:18,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 796.0ms TimeCoverageRelationStatistics Valid=281, Invalid=1525, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:01:18,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10952 states. [2021-07-13 20:01:18,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10952 to 9749. [2021-07-13 20:01:18,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9749 states, 9748 states have (on average 4.516208453016003) internal successors, (44024), 9748 states have internal predecessors, (44024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9749 states to 9749 states and 44024 transitions. [2021-07-13 20:01:18,420 INFO L78 Accepts]: Start accepts. Automaton has 9749 states and 44024 transitions. Word has length 33 [2021-07-13 20:01:18,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:18,420 INFO L482 AbstractCegarLoop]: Abstraction has 9749 states and 44024 transitions. [2021-07-13 20:01:18,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 9749 states and 44024 transitions. [2021-07-13 20:01:18,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:18,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:18,441 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:18,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-07-13 20:01:18,642 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:18,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:18,642 INFO L82 PathProgramCache]: Analyzing trace with hash 324950060, now seen corresponding path program 191 times [2021-07-13 20:01:18,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:18,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716381362] [2021-07-13 20:01:18,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:18,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:18,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716381362] [2021-07-13 20:01:18,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716381362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:18,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236993699] [2021-07-13 20:01:18,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:18,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:01:18,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:18,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:18,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:19,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:19,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 20:01:19,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:19,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:19,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:19,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 20:01:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:19,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236993699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:19,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:19,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:01:19,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430955525] [2021-07-13 20:01:19,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:01:19,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:19,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:01:19,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:01:19,102 INFO L87 Difference]: Start difference. First operand 9749 states and 44024 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:22,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:22,097 INFO L93 Difference]: Finished difference Result 12361 states and 53176 transitions. [2021-07-13 20:01:22,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:01:22,097 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:22,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:22,137 INFO L225 Difference]: With dead ends: 12361 [2021-07-13 20:01:22,137 INFO L226 Difference]: Without dead ends: 12232 [2021-07-13 20:01:22,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 2504.3ms TimeCoverageRelationStatistics Valid=635, Invalid=3271, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:01:22,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12232 states. [2021-07-13 20:01:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12232 to 9721. [2021-07-13 20:01:22,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9721 states, 9720 states have (on average 4.515637860082305) internal successors, (43892), 9720 states have internal predecessors, (43892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9721 states to 9721 states and 43892 transitions. [2021-07-13 20:01:22,408 INFO L78 Accepts]: Start accepts. Automaton has 9721 states and 43892 transitions. Word has length 33 [2021-07-13 20:01:22,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:22,409 INFO L482 AbstractCegarLoop]: Abstraction has 9721 states and 43892 transitions. [2021-07-13 20:01:22,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:22,409 INFO L276 IsEmpty]: Start isEmpty. Operand 9721 states and 43892 transitions. [2021-07-13 20:01:22,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:22,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:22,438 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:22,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-07-13 20:01:22,638 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:22,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:22,638 INFO L82 PathProgramCache]: Analyzing trace with hash -649620276, now seen corresponding path program 192 times [2021-07-13 20:01:22,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:22,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212701635] [2021-07-13 20:01:22,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:22,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:22,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212701635] [2021-07-13 20:01:22,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212701635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:22,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514777432] [2021-07-13 20:01:22,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:22,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:01:22,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:22,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:22,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:23,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:23,085 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:01:23,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 61 [2021-07-13 20:01:23,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:01:23,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:23,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:23,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-07-13 20:01:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:23,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514777432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:23,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:23,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:01:23,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593853516] [2021-07-13 20:01:23,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:01:23,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:23,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:01:23,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:01:23,177 INFO L87 Difference]: Start difference. First operand 9721 states and 43892 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:24,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:24,654 INFO L93 Difference]: Finished difference Result 10477 states and 46818 transitions. [2021-07-13 20:01:24,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:01:24,655 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:24,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:24,690 INFO L225 Difference]: With dead ends: 10477 [2021-07-13 20:01:24,690 INFO L226 Difference]: Without dead ends: 10431 [2021-07-13 20:01:24,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1087.1ms TimeCoverageRelationStatistics Valid=210, Invalid=2046, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:01:24,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10431 states. [2021-07-13 20:01:24,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10431 to 9721. [2021-07-13 20:01:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9721 states, 9720 states have (on average 4.515432098765432) internal successors, (43890), 9720 states have internal predecessors, (43890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:24,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9721 states to 9721 states and 43890 transitions. [2021-07-13 20:01:24,898 INFO L78 Accepts]: Start accepts. Automaton has 9721 states and 43890 transitions. Word has length 33 [2021-07-13 20:01:24,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:24,898 INFO L482 AbstractCegarLoop]: Abstraction has 9721 states and 43890 transitions. [2021-07-13 20:01:24,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:24,898 INFO L276 IsEmpty]: Start isEmpty. Operand 9721 states and 43890 transitions. [2021-07-13 20:01:24,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:24,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:24,918 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:25,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:25,119 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:25,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:25,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2062303326, now seen corresponding path program 193 times [2021-07-13 20:01:25,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:25,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303600611] [2021-07-13 20:01:25,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:25,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:25,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303600611] [2021-07-13 20:01:25,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303600611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:25,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466807647] [2021-07-13 20:01:25,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:25,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:25,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:25,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:01:25,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:25,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:25,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:25,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-13 20:01:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:25,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466807647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:25,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:25,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:01:25,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645944565] [2021-07-13 20:01:25,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:01:25,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:25,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:01:25,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:01:25,580 INFO L87 Difference]: Start difference. First operand 9721 states and 43890 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:27,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:27,086 INFO L93 Difference]: Finished difference Result 10858 states and 48414 transitions. [2021-07-13 20:01:27,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:01:27,086 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:27,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:27,119 INFO L225 Difference]: With dead ends: 10858 [2021-07-13 20:01:27,119 INFO L226 Difference]: Without dead ends: 10767 [2021-07-13 20:01:27,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1225.1ms TimeCoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:01:27,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10767 states. [2021-07-13 20:01:27,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10767 to 9706. [2021-07-13 20:01:27,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9706 states, 9705 states have (on average 4.517053065430191) internal successors, (43838), 9705 states have internal predecessors, (43838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:27,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9706 states to 9706 states and 43838 transitions. [2021-07-13 20:01:27,328 INFO L78 Accepts]: Start accepts. Automaton has 9706 states and 43838 transitions. Word has length 33 [2021-07-13 20:01:27,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:27,328 INFO L482 AbstractCegarLoop]: Abstraction has 9706 states and 43838 transitions. [2021-07-13 20:01:27,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:27,328 INFO L276 IsEmpty]: Start isEmpty. Operand 9706 states and 43838 transitions. [2021-07-13 20:01:27,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:27,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:27,354 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:27,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:27,569 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:27,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:27,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1162175214, now seen corresponding path program 194 times [2021-07-13 20:01:27,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:27,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258080522] [2021-07-13 20:01:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:27,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:27,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258080522] [2021-07-13 20:01:27,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258080522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:27,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214023766] [2021-07-13 20:01:27,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:27,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:01:27,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:27,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:27,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:27,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:27,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-13 20:01:27,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:27,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:27,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:27,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-13 20:01:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:28,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214023766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:28,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:28,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:01:28,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114954760] [2021-07-13 20:01:28,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:01:28,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:28,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:01:28,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:01:28,121 INFO L87 Difference]: Start difference. First operand 9706 states and 43838 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:28,293 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-07-13 20:01:28,428 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-07-13 20:01:30,196 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-07-13 20:01:30,377 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-07-13 20:01:30,534 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-07-13 20:01:30,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:30,546 INFO L93 Difference]: Finished difference Result 10499 states and 46897 transitions. [2021-07-13 20:01:30,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:01:30,547 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:30,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:30,581 INFO L225 Difference]: With dead ends: 10499 [2021-07-13 20:01:30,581 INFO L226 Difference]: Without dead ends: 10468 [2021-07-13 20:01:30,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 2091.3ms TimeCoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:01:30,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10468 states. [2021-07-13 20:01:30,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10468 to 9710. [2021-07-13 20:01:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9710 states, 9709 states have (on average 4.515913070347101) internal successors, (43845), 9709 states have internal predecessors, (43845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:30,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9710 states to 9710 states and 43845 transitions. [2021-07-13 20:01:30,781 INFO L78 Accepts]: Start accepts. Automaton has 9710 states and 43845 transitions. Word has length 33 [2021-07-13 20:01:30,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:30,781 INFO L482 AbstractCegarLoop]: Abstraction has 9710 states and 43845 transitions. [2021-07-13 20:01:30,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:30,782 INFO L276 IsEmpty]: Start isEmpty. Operand 9710 states and 43845 transitions. [2021-07-13 20:01:30,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:30,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:30,802 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:31,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:31,003 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:31,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:31,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1829519476, now seen corresponding path program 195 times [2021-07-13 20:01:31,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:31,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729121394] [2021-07-13 20:01:31,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:31,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:31,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729121394] [2021-07-13 20:01:31,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729121394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:31,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535854675] [2021-07-13 20:01:31,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:31,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:01:31,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:31,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:01:31,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:31,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:31,380 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:01:31,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 20:01:31,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:31,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:31,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:31,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-07-13 20:01:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:31,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535854675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:31,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:31,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 20:01:31,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931099443] [2021-07-13 20:01:31,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:01:31,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:31,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:01:31,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:01:31,566 INFO L87 Difference]: Start difference. First operand 9710 states and 43845 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:32,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:32,940 INFO L93 Difference]: Finished difference Result 10473 states and 46775 transitions. [2021-07-13 20:01:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:01:32,940 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:32,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:32,973 INFO L225 Difference]: With dead ends: 10473 [2021-07-13 20:01:32,973 INFO L226 Difference]: Without dead ends: 10464 [2021-07-13 20:01:32,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1103.3ms TimeCoverageRelationStatistics Valid=382, Invalid=2168, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:01:32,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10464 states. [2021-07-13 20:01:33,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10464 to 9719. [2021-07-13 20:01:33,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9719 states, 9718 states have (on average 4.514817863757975) internal successors, (43875), 9718 states have internal predecessors, (43875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:33,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9719 states to 9719 states and 43875 transitions. [2021-07-13 20:01:33,217 INFO L78 Accepts]: Start accepts. Automaton has 9719 states and 43875 transitions. Word has length 33 [2021-07-13 20:01:33,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:33,217 INFO L482 AbstractCegarLoop]: Abstraction has 9719 states and 43875 transitions. [2021-07-13 20:01:33,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:33,217 INFO L276 IsEmpty]: Start isEmpty. Operand 9719 states and 43875 transitions. [2021-07-13 20:01:33,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:33,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:33,240 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:33,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:33,440 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:33,441 INFO L82 PathProgramCache]: Analyzing trace with hash 797054378, now seen corresponding path program 196 times [2021-07-13 20:01:33,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:33,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787617960] [2021-07-13 20:01:33,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:33,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:33,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787617960] [2021-07-13 20:01:33,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787617960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:33,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686132018] [2021-07-13 20:01:33,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:33,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:01:33,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:33,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:33,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:33,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:01:33,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:33,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:33,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:33,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 20:01:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:33,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686132018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:33,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:33,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:01:33,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691882824] [2021-07-13 20:01:33,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:01:33,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:33,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:01:33,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:01:33,843 INFO L87 Difference]: Start difference. First operand 9719 states and 43875 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:35,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:35,098 INFO L93 Difference]: Finished difference Result 10764 states and 47830 transitions. [2021-07-13 20:01:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:01:35,098 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:35,131 INFO L225 Difference]: With dead ends: 10764 [2021-07-13 20:01:35,131 INFO L226 Difference]: Without dead ends: 10736 [2021-07-13 20:01:35,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1016.1ms TimeCoverageRelationStatistics Valid=388, Invalid=1964, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:01:35,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10736 states. [2021-07-13 20:01:35,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10736 to 9767. [2021-07-13 20:01:35,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 4.518124104034405) internal successors, (44124), 9766 states have internal predecessors, (44124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 44124 transitions. [2021-07-13 20:01:35,338 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 44124 transitions. Word has length 33 [2021-07-13 20:01:35,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:35,338 INFO L482 AbstractCegarLoop]: Abstraction has 9767 states and 44124 transitions. [2021-07-13 20:01:35,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:35,339 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 44124 transitions. [2021-07-13 20:01:35,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:35,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:35,359 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:35,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-07-13 20:01:35,559 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:35,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:35,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1566085748, now seen corresponding path program 197 times [2021-07-13 20:01:35,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:35,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403994862] [2021-07-13 20:01:35,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:35,684 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-07-13 20:01:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:35,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:35,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403994862] [2021-07-13 20:01:35,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403994862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:35,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558282131] [2021-07-13 20:01:35,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:35,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:01:35,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:35,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:35,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:36,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:36,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:01:36,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:36,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:36,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:36,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 20:01:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:36,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558282131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:36,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:36,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:01:36,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66147081] [2021-07-13 20:01:36,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:01:36,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:36,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:01:36,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:01:36,122 INFO L87 Difference]: Start difference. First operand 9767 states and 44124 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:39,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:39,443 INFO L93 Difference]: Finished difference Result 11259 states and 49833 transitions. [2021-07-13 20:01:39,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:01:39,443 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:39,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:39,488 INFO L225 Difference]: With dead ends: 11259 [2021-07-13 20:01:39,488 INFO L226 Difference]: Without dead ends: 11151 [2021-07-13 20:01:39,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2851.2ms TimeCoverageRelationStatistics Valid=758, Invalid=4792, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:01:39,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11151 states. [2021-07-13 20:01:39,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11151 to 9762. [2021-07-13 20:01:39,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9762 states, 9761 states have (on average 4.516545435918451) internal successors, (44086), 9761 states have internal predecessors, (44086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:39,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9762 states to 9762 states and 44086 transitions. [2021-07-13 20:01:39,754 INFO L78 Accepts]: Start accepts. Automaton has 9762 states and 44086 transitions. Word has length 33 [2021-07-13 20:01:39,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:39,754 INFO L482 AbstractCegarLoop]: Abstraction has 9762 states and 44086 transitions. [2021-07-13 20:01:39,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 9762 states and 44086 transitions. [2021-07-13 20:01:39,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:39,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:39,779 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:39,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:39,980 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:39,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:39,980 INFO L82 PathProgramCache]: Analyzing trace with hash 179923100, now seen corresponding path program 198 times [2021-07-13 20:01:39,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:39,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990118496] [2021-07-13 20:01:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:40,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:40,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990118496] [2021-07-13 20:01:40,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990118496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:40,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531095910] [2021-07-13 20:01:40,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:40,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:01:40,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:40,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:40,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:40,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:40,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:01:40,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:40,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:40,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:40,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 20:01:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:40,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531095910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:40,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:40,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:01:40,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399538844] [2021-07-13 20:01:40,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:01:40,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:40,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:01:40,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:01:40,597 INFO L87 Difference]: Start difference. First operand 9762 states and 44086 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:43,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:43,303 INFO L93 Difference]: Finished difference Result 11048 states and 48438 transitions. [2021-07-13 20:01:43,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:01:43,303 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:43,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:43,344 INFO L225 Difference]: With dead ends: 11048 [2021-07-13 20:01:43,344 INFO L226 Difference]: Without dead ends: 11007 [2021-07-13 20:01:43,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 2090.2ms TimeCoverageRelationStatistics Valid=333, Invalid=2859, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:01:43,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11007 states. [2021-07-13 20:01:43,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11007 to 9747. [2021-07-13 20:01:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9747 states, 9746 states have (on average 4.518469115534578) internal successors, (44037), 9746 states have internal predecessors, (44037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9747 states to 9747 states and 44037 transitions. [2021-07-13 20:01:43,605 INFO L78 Accepts]: Start accepts. Automaton has 9747 states and 44037 transitions. Word has length 33 [2021-07-13 20:01:43,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:43,605 INFO L482 AbstractCegarLoop]: Abstraction has 9747 states and 44037 transitions. [2021-07-13 20:01:43,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:43,605 INFO L276 IsEmpty]: Start isEmpty. Operand 9747 states and 44037 transitions. [2021-07-13 20:01:43,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:43,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:43,628 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:43,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-07-13 20:01:43,829 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:43,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:43,829 INFO L82 PathProgramCache]: Analyzing trace with hash -868849302, now seen corresponding path program 199 times [2021-07-13 20:01:43,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:43,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213069388] [2021-07-13 20:01:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:44,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:44,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213069388] [2021-07-13 20:01:44,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213069388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:44,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580116663] [2021-07-13 20:01:44,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:44,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:44,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:44,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:44,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:01:44,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:44,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:44,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:44,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 20:01:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:44,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580116663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:44,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:44,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:01:44,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817332331] [2021-07-13 20:01:44,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:01:44,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:44,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:01:44,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:01:44,258 INFO L87 Difference]: Start difference. First operand 9747 states and 44037 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:46,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:46,077 INFO L93 Difference]: Finished difference Result 11122 states and 49316 transitions. [2021-07-13 20:01:46,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:01:46,077 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:46,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:46,125 INFO L225 Difference]: With dead ends: 11122 [2021-07-13 20:01:46,125 INFO L226 Difference]: Without dead ends: 11060 [2021-07-13 20:01:46,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1505.6ms TimeCoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:01:46,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11060 states. [2021-07-13 20:01:46,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11060 to 9909. [2021-07-13 20:01:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9909 states, 9908 states have (on average 4.515643924101736) internal successors, (44741), 9908 states have internal predecessors, (44741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:46,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9909 states to 9909 states and 44741 transitions. [2021-07-13 20:01:46,442 INFO L78 Accepts]: Start accepts. Automaton has 9909 states and 44741 transitions. Word has length 33 [2021-07-13 20:01:46,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:46,442 INFO L482 AbstractCegarLoop]: Abstraction has 9909 states and 44741 transitions. [2021-07-13 20:01:46,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 9909 states and 44741 transitions. [2021-07-13 20:01:46,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:46,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:46,470 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:46,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:46,671 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:46,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:46,671 INFO L82 PathProgramCache]: Analyzing trace with hash 434423304, now seen corresponding path program 200 times [2021-07-13 20:01:46,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:46,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2517956] [2021-07-13 20:01:46,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:46,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:46,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2517956] [2021-07-13 20:01:46,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2517956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:46,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543069370] [2021-07-13 20:01:46,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:46,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:01:46,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:46,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:46,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:46,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:46,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:01:47,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:47,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:47,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:47,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 20:01:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:47,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543069370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:47,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:47,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:01:47,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150024595] [2021-07-13 20:01:47,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:01:47,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:47,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:01:47,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:01:47,215 INFO L87 Difference]: Start difference. First operand 9909 states and 44741 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:48,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:48,726 INFO L93 Difference]: Finished difference Result 10535 states and 47047 transitions. [2021-07-13 20:01:48,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:01:48,726 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:48,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:48,761 INFO L225 Difference]: With dead ends: 10535 [2021-07-13 20:01:48,761 INFO L226 Difference]: Without dead ends: 10518 [2021-07-13 20:01:48,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1285.5ms TimeCoverageRelationStatistics Valid=386, Invalid=1684, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:01:48,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10518 states. [2021-07-13 20:01:48,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10518 to 9909. [2021-07-13 20:01:48,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9909 states, 9908 states have (on average 4.514937424303593) internal successors, (44734), 9908 states have internal predecessors, (44734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9909 states to 9909 states and 44734 transitions. [2021-07-13 20:01:48,986 INFO L78 Accepts]: Start accepts. Automaton has 9909 states and 44734 transitions. Word has length 33 [2021-07-13 20:01:48,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:48,986 INFO L482 AbstractCegarLoop]: Abstraction has 9909 states and 44734 transitions. [2021-07-13 20:01:48,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 9909 states and 44734 transitions. [2021-07-13 20:01:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:49,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:49,010 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:49,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:49,211 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:49,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:49,211 INFO L82 PathProgramCache]: Analyzing trace with hash -464938768, now seen corresponding path program 201 times [2021-07-13 20:01:49,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:49,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744519712] [2021-07-13 20:01:49,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:49,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:49,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744519712] [2021-07-13 20:01:49,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744519712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:49,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203102732] [2021-07-13 20:01:49,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:49,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:01:49,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:49,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:01:49,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:49,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:49,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:49,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-07-13 20:01:49,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:49,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:49,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:49,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:38 [2021-07-13 20:01:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:49,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203102732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:49,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:49,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:01:49,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999651196] [2021-07-13 20:01:49,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:01:49,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:49,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:01:49,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:01:49,860 INFO L87 Difference]: Start difference. First operand 9909 states and 44734 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:50,988 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-07-13 20:01:51,255 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-07-13 20:01:53,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:53,077 INFO L93 Difference]: Finished difference Result 10925 states and 48576 transitions. [2021-07-13 20:01:53,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:01:53,077 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:53,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:53,123 INFO L225 Difference]: With dead ends: 10925 [2021-07-13 20:01:53,123 INFO L226 Difference]: Without dead ends: 10879 [2021-07-13 20:01:53,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 2631.9ms TimeCoverageRelationStatistics Valid=541, Invalid=3119, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:01:53,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10879 states. [2021-07-13 20:01:53,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10879 to 9900. [2021-07-13 20:01:53,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9900 states, 9899 states have (on average 4.516011718355389) internal successors, (44704), 9899 states have internal predecessors, (44704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:53,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9900 states to 9900 states and 44704 transitions. [2021-07-13 20:01:53,428 INFO L78 Accepts]: Start accepts. Automaton has 9900 states and 44704 transitions. Word has length 33 [2021-07-13 20:01:53,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:53,428 INFO L482 AbstractCegarLoop]: Abstraction has 9900 states and 44704 transitions. [2021-07-13 20:01:53,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:53,428 INFO L276 IsEmpty]: Start isEmpty. Operand 9900 states and 44704 transitions. [2021-07-13 20:01:53,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:53,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:53,454 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:53,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-07-13 20:01:53,655 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:53,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:53,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2049430226, now seen corresponding path program 202 times [2021-07-13 20:01:53,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:53,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011043036] [2021-07-13 20:01:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:53,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:53,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011043036] [2021-07-13 20:01:53,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011043036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:53,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536504274] [2021-07-13 20:01:53,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:53,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:01:53,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:53,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:53,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:54,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:01:54,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:54,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:54,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:54,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 20:01:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:54,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536504274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:54,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:54,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:01:54,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260003283] [2021-07-13 20:01:54,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:01:54,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:54,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:01:54,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:01:54,158 INFO L87 Difference]: Start difference. First operand 9900 states and 44704 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:55,159 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-13 20:01:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:56,541 INFO L93 Difference]: Finished difference Result 10927 states and 48544 transitions. [2021-07-13 20:01:56,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:01:56,541 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:56,578 INFO L225 Difference]: With dead ends: 10927 [2021-07-13 20:01:56,578 INFO L226 Difference]: Without dead ends: 10861 [2021-07-13 20:01:56,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 2001.9ms TimeCoverageRelationStatistics Valid=591, Invalid=2949, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:01:56,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10861 states. [2021-07-13 20:01:56,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10861 to 9863. [2021-07-13 20:01:56,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9863 states, 9862 states have (on average 4.517136483471912) internal successors, (44548), 9862 states have internal predecessors, (44548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9863 states to 9863 states and 44548 transitions. [2021-07-13 20:01:56,832 INFO L78 Accepts]: Start accepts. Automaton has 9863 states and 44548 transitions. Word has length 33 [2021-07-13 20:01:56,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:56,832 INFO L482 AbstractCegarLoop]: Abstraction has 9863 states and 44548 transitions. [2021-07-13 20:01:56,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:56,833 INFO L276 IsEmpty]: Start isEmpty. Operand 9863 states and 44548 transitions. [2021-07-13 20:01:56,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:56,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:56,855 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:57,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:57,056 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:57,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:57,056 INFO L82 PathProgramCache]: Analyzing trace with hash -349616982, now seen corresponding path program 203 times [2021-07-13 20:01:57,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:57,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462434519] [2021-07-13 20:01:57,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:57,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:57,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462434519] [2021-07-13 20:01:57,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462434519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:57,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12874402] [2021-07-13 20:01:57,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:57,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:01:57,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:57,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:57,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:57,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:01:57,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:57,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:57,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:57,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 20:01:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:57,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12874402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:57,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:57,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:01:57,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854743166] [2021-07-13 20:01:57,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:01:57,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:57,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:01:57,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:01:57,492 INFO L87 Difference]: Start difference. First operand 9863 states and 44548 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:59,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:59,076 INFO L93 Difference]: Finished difference Result 10515 states and 47212 transitions. [2021-07-13 20:01:59,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:01:59,077 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:01:59,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:59,122 INFO L225 Difference]: With dead ends: 10515 [2021-07-13 20:01:59,122 INFO L226 Difference]: Without dead ends: 10463 [2021-07-13 20:01:59,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1320.7ms TimeCoverageRelationStatistics Valid=340, Invalid=1916, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:01:59,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10463 states. [2021-07-13 20:01:59,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10463 to 9848. [2021-07-13 20:01:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9848 states, 9847 states have (on average 4.519041332385498) internal successors, (44499), 9847 states have internal predecessors, (44499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:59,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9848 states to 9848 states and 44499 transitions. [2021-07-13 20:01:59,395 INFO L78 Accepts]: Start accepts. Automaton has 9848 states and 44499 transitions. Word has length 33 [2021-07-13 20:01:59,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:59,395 INFO L482 AbstractCegarLoop]: Abstraction has 9848 states and 44499 transitions. [2021-07-13 20:01:59,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:59,395 INFO L276 IsEmpty]: Start isEmpty. Operand 9848 states and 44499 transitions. [2021-07-13 20:01:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:01:59,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:59,421 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:59,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-07-13 20:01:59,622 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:59,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:59,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1565931522, now seen corresponding path program 204 times [2021-07-13 20:01:59,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:59,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011415616] [2021-07-13 20:01:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:59,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:59,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011415616] [2021-07-13 20:01:59,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011415616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:59,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974835273] [2021-07-13 20:01:59,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:59,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:01:59,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:59,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:01:59,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:00,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:00,053 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:02:00,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-07-13 20:02:00,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:02:00,089 INFO L628 ElimStorePlain]: treesize reduction 88, result has 20.0 percent of original size [2021-07-13 20:02:00,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:00,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-13 20:02:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:00,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974835273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:00,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:00,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:02:00,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045378567] [2021-07-13 20:02:00,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:02:00,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:00,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:02:00,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:02:00,227 INFO L87 Difference]: Start difference. First operand 9848 states and 44499 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:01,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:01,987 INFO L93 Difference]: Finished difference Result 10903 states and 48475 transitions. [2021-07-13 20:02:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:02:01,987 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:01,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:02,022 INFO L225 Difference]: With dead ends: 10903 [2021-07-13 20:02:02,022 INFO L226 Difference]: Without dead ends: 10872 [2021-07-13 20:02:02,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1287.2ms TimeCoverageRelationStatistics Valid=315, Invalid=2441, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:02:02,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10872 states. [2021-07-13 20:02:02,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10872 to 9939. [2021-07-13 20:02:02,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9939 states, 9938 states have (on average 4.519118534916482) internal successors, (44911), 9938 states have internal predecessors, (44911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:02,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9939 states to 9939 states and 44911 transitions. [2021-07-13 20:02:02,249 INFO L78 Accepts]: Start accepts. Automaton has 9939 states and 44911 transitions. Word has length 33 [2021-07-13 20:02:02,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:02,249 INFO L482 AbstractCegarLoop]: Abstraction has 9939 states and 44911 transitions. [2021-07-13 20:02:02,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:02,250 INFO L276 IsEmpty]: Start isEmpty. Operand 9939 states and 44911 transitions. [2021-07-13 20:02:02,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:02,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:02,274 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:02,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-07-13 20:02:02,475 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:02,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:02,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1425763168, now seen corresponding path program 205 times [2021-07-13 20:02:02,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:02,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387165810] [2021-07-13 20:02:02,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:02,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:02,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387165810] [2021-07-13 20:02:02,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387165810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:02,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971522657] [2021-07-13 20:02:02,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:02,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:02,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:02,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:02,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 20:02:02,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:02,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:02,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:02,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 20:02:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:02,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971522657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:02,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:02,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:02:02,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629160485] [2021-07-13 20:02:02,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:02:02,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:02,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:02:02,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:02:02,918 INFO L87 Difference]: Start difference. First operand 9939 states and 44911 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:04,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:04,356 INFO L93 Difference]: Finished difference Result 11337 states and 50150 transitions. [2021-07-13 20:02:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:02:04,356 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:04,406 INFO L225 Difference]: With dead ends: 11337 [2021-07-13 20:02:04,406 INFO L226 Difference]: Without dead ends: 11305 [2021-07-13 20:02:04,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1074.3ms TimeCoverageRelationStatistics Valid=363, Invalid=2087, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:02:04,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11305 states. [2021-07-13 20:02:04,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11305 to 10013. [2021-07-13 20:02:04,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10013 states, 10012 states have (on average 4.521973631642029) internal successors, (45274), 10012 states have internal predecessors, (45274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:04,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10013 states to 10013 states and 45274 transitions. [2021-07-13 20:02:04,736 INFO L78 Accepts]: Start accepts. Automaton has 10013 states and 45274 transitions. Word has length 33 [2021-07-13 20:02:04,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:04,736 INFO L482 AbstractCegarLoop]: Abstraction has 10013 states and 45274 transitions. [2021-07-13 20:02:04,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:04,736 INFO L276 IsEmpty]: Start isEmpty. Operand 10013 states and 45274 transitions. [2021-07-13 20:02:04,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:04,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:04,760 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:04,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:04,960 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:04,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:04,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1200810686, now seen corresponding path program 206 times [2021-07-13 20:02:04,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:04,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404989405] [2021-07-13 20:02:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:05,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:05,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404989405] [2021-07-13 20:02:05,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404989405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:05,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047880516] [2021-07-13 20:02:05,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:05,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:02:05,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:05,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:05,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:05,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:05,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 20:02:05,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:05,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:05,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:05,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-13 20:02:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:05,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047880516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:05,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:05,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:02:05,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100217045] [2021-07-13 20:02:05,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:02:05,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:05,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:02:05,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:02:05,517 INFO L87 Difference]: Start difference. First operand 10013 states and 45274 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:06,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:06,891 INFO L93 Difference]: Finished difference Result 10866 states and 48475 transitions. [2021-07-13 20:02:06,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:02:06,891 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:06,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:06,928 INFO L225 Difference]: With dead ends: 10866 [2021-07-13 20:02:06,929 INFO L226 Difference]: Without dead ends: 10848 [2021-07-13 20:02:06,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1156.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:02:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10848 states. [2021-07-13 20:02:07,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10848 to 10009. [2021-07-13 20:02:07,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10009 states, 10008 states have (on average 4.5223820943245405) internal successors, (45260), 10008 states have internal predecessors, (45260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:07,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10009 states to 10009 states and 45260 transitions. [2021-07-13 20:02:07,324 INFO L78 Accepts]: Start accepts. Automaton has 10009 states and 45260 transitions. Word has length 33 [2021-07-13 20:02:07,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:07,324 INFO L482 AbstractCegarLoop]: Abstraction has 10009 states and 45260 transitions. [2021-07-13 20:02:07,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:07,324 INFO L276 IsEmpty]: Start isEmpty. Operand 10009 states and 45260 transitions. [2021-07-13 20:02:07,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:07,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:07,350 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:07,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:07,550 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:07,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:07,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1479149688, now seen corresponding path program 207 times [2021-07-13 20:02:07,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:07,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633950236] [2021-07-13 20:02:07,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:07,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:07,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633950236] [2021-07-13 20:02:07,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633950236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:07,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622863237] [2021-07-13 20:02:07,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:07,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:02:07,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:07,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:07,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:07,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:07,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-07-13 20:02:07,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:07,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:07,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:07,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-07-13 20:02:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:08,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622863237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:08,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:08,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:02:08,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272968968] [2021-07-13 20:02:08,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:02:08,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:08,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:02:08,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:02:08,170 INFO L87 Difference]: Start difference. First operand 10009 states and 45260 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:08,310 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-07-13 20:02:08,531 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-07-13 20:02:09,250 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-07-13 20:02:11,258 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-07-13 20:02:11,623 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-07-13 20:02:11,804 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-07-13 20:02:12,000 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-07-13 20:02:12,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:12,225 INFO L93 Difference]: Finished difference Result 12044 states and 52051 transitions. [2021-07-13 20:02:12,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:02:12,225 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:12,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:12,269 INFO L225 Difference]: With dead ends: 12044 [2021-07-13 20:02:12,270 INFO L226 Difference]: Without dead ends: 11983 [2021-07-13 20:02:12,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 3283.7ms TimeCoverageRelationStatistics Valid=668, Invalid=3888, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:02:12,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11983 states. [2021-07-13 20:02:12,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11983 to 9932. [2021-07-13 20:02:12,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9932 states, 9931 states have (on average 4.521699728124056) internal successors, (44905), 9931 states have internal predecessors, (44905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:12,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9932 states to 9932 states and 44905 transitions. [2021-07-13 20:02:12,550 INFO L78 Accepts]: Start accepts. Automaton has 9932 states and 44905 transitions. Word has length 33 [2021-07-13 20:02:12,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:12,550 INFO L482 AbstractCegarLoop]: Abstraction has 9932 states and 44905 transitions. [2021-07-13 20:02:12,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:12,551 INFO L276 IsEmpty]: Start isEmpty. Operand 9932 states and 44905 transitions. [2021-07-13 20:02:12,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:12,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:12,575 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:12,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:12,775 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:12,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:12,776 INFO L82 PathProgramCache]: Analyzing trace with hash 2085163842, now seen corresponding path program 208 times [2021-07-13 20:02:12,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:12,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559384859] [2021-07-13 20:02:12,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:12,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:12,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559384859] [2021-07-13 20:02:12,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559384859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:12,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819128860] [2021-07-13 20:02:12,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:12,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:02:12,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:12,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:12,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:13,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:02:13,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:13,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:13,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:13,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-13 20:02:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:13,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819128860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:13,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:13,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:02:13,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537064470] [2021-07-13 20:02:13,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:02:13,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:13,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:02:13,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:02:13,241 INFO L87 Difference]: Start difference. First operand 9932 states and 44905 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:15,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:15,057 INFO L93 Difference]: Finished difference Result 10683 states and 47883 transitions. [2021-07-13 20:02:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:02:15,058 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:15,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:15,101 INFO L225 Difference]: With dead ends: 10683 [2021-07-13 20:02:15,101 INFO L226 Difference]: Without dead ends: 10643 [2021-07-13 20:02:15,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1483.5ms TimeCoverageRelationStatistics Valid=325, Invalid=2225, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:02:15,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10643 states. [2021-07-13 20:02:15,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10643 to 9935. [2021-07-13 20:02:15,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9935 states, 9934 states have (on average 4.520938192067646) internal successors, (44911), 9934 states have internal predecessors, (44911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9935 states to 9935 states and 44911 transitions. [2021-07-13 20:02:15,382 INFO L78 Accepts]: Start accepts. Automaton has 9935 states and 44911 transitions. Word has length 33 [2021-07-13 20:02:15,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:15,382 INFO L482 AbstractCegarLoop]: Abstraction has 9935 states and 44911 transitions. [2021-07-13 20:02:15,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:15,382 INFO L276 IsEmpty]: Start isEmpty. Operand 9935 states and 44911 transitions. [2021-07-13 20:02:15,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:15,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:15,407 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:15,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-07-13 20:02:15,608 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:15,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:15,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1521566418, now seen corresponding path program 209 times [2021-07-13 20:02:15,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:15,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417102168] [2021-07-13 20:02:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:15,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:15,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417102168] [2021-07-13 20:02:15,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417102168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:15,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870962731] [2021-07-13 20:02:15,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:15,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:02:15,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:15,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:15,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:16,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:16,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 20:02:16,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:16,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:16,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:16,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 20:02:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:16,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870962731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:16,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:16,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:02:16,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043792204] [2021-07-13 20:02:16,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:02:16,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:16,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:02:16,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:02:16,100 INFO L87 Difference]: Start difference. First operand 9935 states and 44911 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:18,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:18,036 INFO L93 Difference]: Finished difference Result 11298 states and 50151 transitions. [2021-07-13 20:02:18,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:02:18,036 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:18,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:18,090 INFO L225 Difference]: With dead ends: 11298 [2021-07-13 20:02:18,091 INFO L226 Difference]: Without dead ends: 11216 [2021-07-13 20:02:18,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1521.1ms TimeCoverageRelationStatistics Valid=376, Invalid=2594, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:02:18,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11216 states. [2021-07-13 20:02:18,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11216 to 9944. [2021-07-13 20:02:18,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9944 states, 9943 states have (on average 4.521371819370412) internal successors, (44956), 9943 states have internal predecessors, (44956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:18,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9944 states to 9944 states and 44956 transitions. [2021-07-13 20:02:18,459 INFO L78 Accepts]: Start accepts. Automaton has 9944 states and 44956 transitions. Word has length 33 [2021-07-13 20:02:18,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:18,459 INFO L482 AbstractCegarLoop]: Abstraction has 9944 states and 44956 transitions. [2021-07-13 20:02:18,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:18,459 INFO L276 IsEmpty]: Start isEmpty. Operand 9944 states and 44956 transitions. [2021-07-13 20:02:18,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:18,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:18,490 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:18,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-07-13 20:02:18,691 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:18,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:18,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1841247272, now seen corresponding path program 210 times [2021-07-13 20:02:18,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:18,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408455732] [2021-07-13 20:02:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:18,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:18,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408455732] [2021-07-13 20:02:18,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408455732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:18,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934688484] [2021-07-13 20:02:18,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:18,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:02:18,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:18,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:18,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:19,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:19,207 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:02:19,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 61 [2021-07-13 20:02:19,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:02:19,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:19,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:19,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-07-13 20:02:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:19,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934688484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:19,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:19,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:02:19,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687938092] [2021-07-13 20:02:19,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:02:19,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:19,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:02:19,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:02:19,316 INFO L87 Difference]: Start difference. First operand 9944 states and 44956 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:21,061 INFO L93 Difference]: Finished difference Result 10525 states and 47152 transitions. [2021-07-13 20:02:21,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:02:21,062 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:21,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:21,102 INFO L225 Difference]: With dead ends: 10525 [2021-07-13 20:02:21,103 INFO L226 Difference]: Without dead ends: 10471 [2021-07-13 20:02:21,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1169.3ms TimeCoverageRelationStatistics Valid=187, Invalid=1883, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:02:21,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10471 states. [2021-07-13 20:02:21,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10471 to 9929. [2021-07-13 20:02:21,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9929 states, 9928 states have (on average 4.522562449637389) internal successors, (44900), 9928 states have internal predecessors, (44900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:21,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9929 states to 9929 states and 44900 transitions. [2021-07-13 20:02:21,364 INFO L78 Accepts]: Start accepts. Automaton has 9929 states and 44900 transitions. Word has length 33 [2021-07-13 20:02:21,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:21,364 INFO L482 AbstractCegarLoop]: Abstraction has 9929 states and 44900 transitions. [2021-07-13 20:02:21,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:21,365 INFO L276 IsEmpty]: Start isEmpty. Operand 9929 states and 44900 transitions. [2021-07-13 20:02:21,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:21,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:21,390 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:21,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-07-13 20:02:21,604 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:21,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:21,604 INFO L82 PathProgramCache]: Analyzing trace with hash -417874744, now seen corresponding path program 211 times [2021-07-13 20:02:21,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:21,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072394617] [2021-07-13 20:02:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:21,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:21,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072394617] [2021-07-13 20:02:21,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072394617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:21,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181136633] [2021-07-13 20:02:21,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:21,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:21,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:22,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:22,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 20:02:22,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:22,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:22,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:22,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 20:02:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:22,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181136633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:22,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:22,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:02:22,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738644803] [2021-07-13 20:02:22,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:02:22,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:22,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:02:22,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:02:22,103 INFO L87 Difference]: Start difference. First operand 9929 states and 44900 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:24,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:24,130 INFO L93 Difference]: Finished difference Result 11120 states and 49642 transitions. [2021-07-13 20:02:24,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:02:24,130 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:24,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:24,171 INFO L225 Difference]: With dead ends: 11120 [2021-07-13 20:02:24,171 INFO L226 Difference]: Without dead ends: 11089 [2021-07-13 20:02:24,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1641.6ms TimeCoverageRelationStatistics Valid=398, Invalid=2572, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:02:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11089 states. [2021-07-13 20:02:24,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11089 to 10047. [2021-07-13 20:02:24,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 4.522496516026279) internal successors, (45433), 10046 states have internal predecessors, (45433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 45433 transitions. [2021-07-13 20:02:24,424 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 45433 transitions. Word has length 33 [2021-07-13 20:02:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:24,424 INFO L482 AbstractCegarLoop]: Abstraction has 10047 states and 45433 transitions. [2021-07-13 20:02:24,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 45433 transitions. [2021-07-13 20:02:24,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:24,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:24,452 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:24,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-07-13 20:02:24,653 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:24,653 INFO L82 PathProgramCache]: Analyzing trace with hash 885397862, now seen corresponding path program 212 times [2021-07-13 20:02:24,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:24,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597021222] [2021-07-13 20:02:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:24,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:24,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597021222] [2021-07-13 20:02:24,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597021222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:24,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603073936] [2021-07-13 20:02:24,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:24,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:02:24,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:24,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:24,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:25,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:25,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 20:02:25,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:25,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:25,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:25,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-13 20:02:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:25,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603073936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:25,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:25,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:02:25,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719252403] [2021-07-13 20:02:25,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:02:25,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:25,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:02:25,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:02:25,207 INFO L87 Difference]: Start difference. First operand 10047 states and 45433 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:26,502 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2021-07-13 20:02:26,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:26,505 INFO L93 Difference]: Finished difference Result 10679 states and 47706 transitions. [2021-07-13 20:02:26,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:02:26,506 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:26,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:26,545 INFO L225 Difference]: With dead ends: 10679 [2021-07-13 20:02:26,545 INFO L226 Difference]: Without dead ends: 10662 [2021-07-13 20:02:26,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1076.9ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:02:26,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10662 states. [2021-07-13 20:02:26,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10662 to 10047. [2021-07-13 20:02:26,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 4.521799721282102) internal successors, (45426), 10046 states have internal predecessors, (45426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:26,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 45426 transitions. [2021-07-13 20:02:26,779 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 45426 transitions. Word has length 33 [2021-07-13 20:02:26,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:26,779 INFO L482 AbstractCegarLoop]: Abstraction has 10047 states and 45426 transitions. [2021-07-13 20:02:26,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:26,779 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 45426 transitions. [2021-07-13 20:02:26,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:26,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:26,803 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:27,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:27,003 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:27,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:27,004 INFO L82 PathProgramCache]: Analyzing trace with hash -13964210, now seen corresponding path program 213 times [2021-07-13 20:02:27,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:27,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154237941] [2021-07-13 20:02:27,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:27,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:27,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154237941] [2021-07-13 20:02:27,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154237941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:27,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411143269] [2021-07-13 20:02:27,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:27,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:02:27,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:27,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:27,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:27,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:27,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 20:02:27,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:27,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:27,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:27,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-13 20:02:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:27,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411143269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:27,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:27,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:02:27,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978413248] [2021-07-13 20:02:27,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:02:27,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:27,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:02:27,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:02:27,654 INFO L87 Difference]: Start difference. First operand 10047 states and 45426 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:27,797 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-07-13 20:02:28,034 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2021-07-13 20:02:28,607 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-07-13 20:02:28,823 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-07-13 20:02:30,745 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-07-13 20:02:30,997 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-07-13 20:02:31,204 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-07-13 20:02:31,400 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-07-13 20:02:31,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:31,415 INFO L93 Difference]: Finished difference Result 11114 states and 49418 transitions. [2021-07-13 20:02:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:02:31,415 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:31,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:31,461 INFO L225 Difference]: With dead ends: 11114 [2021-07-13 20:02:31,461 INFO L226 Difference]: Without dead ends: 11091 [2021-07-13 20:02:31,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 3126.3ms TimeCoverageRelationStatistics Valid=494, Invalid=3288, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:02:31,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11091 states. [2021-07-13 20:02:31,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11091 to 10047. [2021-07-13 20:02:31,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 4.521799721282102) internal successors, (45426), 10046 states have internal predecessors, (45426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 45426 transitions. [2021-07-13 20:02:31,732 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 45426 transitions. Word has length 33 [2021-07-13 20:02:31,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:31,732 INFO L482 AbstractCegarLoop]: Abstraction has 10047 states and 45426 transitions. [2021-07-13 20:02:31,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:31,733 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 45426 transitions. [2021-07-13 20:02:31,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:31,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:31,756 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:31,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:31,957 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:31,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:31,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1794562512, now seen corresponding path program 214 times [2021-07-13 20:02:31,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:31,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039656901] [2021-07-13 20:02:31,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:32,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:32,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039656901] [2021-07-13 20:02:32,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039656901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:32,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056564365] [2021-07-13 20:02:32,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:32,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:02:32,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:32,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:32,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:32,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:02:32,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:32,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:32,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:32,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-13 20:02:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:32,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056564365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:32,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:32,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:02:32,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637519151] [2021-07-13 20:02:32,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:02:32,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:32,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:02:32,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:02:32,459 INFO L87 Difference]: Start difference. First operand 10047 states and 45426 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:32,872 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-07-13 20:02:33,594 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-07-13 20:02:33,796 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-07-13 20:02:34,087 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-07-13 20:02:35,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:35,463 INFO L93 Difference]: Finished difference Result 11226 states and 49984 transitions. [2021-07-13 20:02:35,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:02:35,463 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:35,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:35,504 INFO L225 Difference]: With dead ends: 11226 [2021-07-13 20:02:35,504 INFO L226 Difference]: Without dead ends: 11169 [2021-07-13 20:02:35,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 2439.4ms TimeCoverageRelationStatistics Valid=499, Invalid=2807, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:02:35,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11169 states. [2021-07-13 20:02:35,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11169 to 10001. [2021-07-13 20:02:35,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10001 states, 10000 states have (on average 4.5222) internal successors, (45222), 10000 states have internal predecessors, (45222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10001 states to 10001 states and 45222 transitions. [2021-07-13 20:02:35,758 INFO L78 Accepts]: Start accepts. Automaton has 10001 states and 45222 transitions. Word has length 33 [2021-07-13 20:02:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:35,759 INFO L482 AbstractCegarLoop]: Abstraction has 10001 states and 45222 transitions. [2021-07-13 20:02:35,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:35,759 INFO L276 IsEmpty]: Start isEmpty. Operand 10001 states and 45222 transitions. [2021-07-13 20:02:35,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:35,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:35,781 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:35,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:35,981 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:35,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:35,982 INFO L82 PathProgramCache]: Analyzing trace with hash 101357576, now seen corresponding path program 215 times [2021-07-13 20:02:35,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:35,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310420473] [2021-07-13 20:02:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:36,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:36,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310420473] [2021-07-13 20:02:36,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310420473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:36,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762928453] [2021-07-13 20:02:36,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:36,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:02:36,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:36,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:36,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:36,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:02:36,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:36,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:36,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:36,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-13 20:02:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:36,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762928453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:36,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:36,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:02:36,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185757272] [2021-07-13 20:02:36,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:02:36,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:36,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:02:36,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:02:36,488 INFO L87 Difference]: Start difference. First operand 10001 states and 45222 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:38,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:38,360 INFO L93 Difference]: Finished difference Result 10673 states and 47914 transitions. [2021-07-13 20:02:38,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:02:38,360 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:38,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:38,401 INFO L225 Difference]: With dead ends: 10673 [2021-07-13 20:02:38,401 INFO L226 Difference]: Without dead ends: 10621 [2021-07-13 20:02:38,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1492.2ms TimeCoverageRelationStatistics Valid=344, Invalid=2308, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:02:38,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10621 states. [2021-07-13 20:02:38,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10621 to 9977. [2021-07-13 20:02:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9977 states, 9976 states have (on average 4.522453889334402) internal successors, (45116), 9976 states have internal predecessors, (45116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:38,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9977 states to 9977 states and 45116 transitions. [2021-07-13 20:02:38,756 INFO L78 Accepts]: Start accepts. Automaton has 9977 states and 45116 transitions. Word has length 33 [2021-07-13 20:02:38,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:38,756 INFO L482 AbstractCegarLoop]: Abstraction has 9977 states and 45116 transitions. [2021-07-13 20:02:38,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:38,756 INFO L276 IsEmpty]: Start isEmpty. Operand 9977 states and 45116 transitions. [2021-07-13 20:02:38,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:38,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:38,780 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:38,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-07-13 20:02:38,981 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:38,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:38,981 INFO L82 PathProgramCache]: Analyzing trace with hash -142558994, now seen corresponding path program 216 times [2021-07-13 20:02:38,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:38,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898493552] [2021-07-13 20:02:38,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:39,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:39,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:39,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898493552] [2021-07-13 20:02:39,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898493552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:39,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009767728] [2021-07-13 20:02:39,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:39,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:02:39,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:39,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:39,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:39,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:39,456 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:02:39,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 61 [2021-07-13 20:02:39,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:02:39,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:39,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:39,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-07-13 20:02:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:39,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009767728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:39,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:39,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:02:39,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895060857] [2021-07-13 20:02:39,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:02:39,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:39,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:02:39,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:02:39,551 INFO L87 Difference]: Start difference. First operand 9977 states and 45116 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:40,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:40,979 INFO L93 Difference]: Finished difference Result 10560 states and 47255 transitions. [2021-07-13 20:02:40,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:02:40,979 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:40,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:41,014 INFO L225 Difference]: With dead ends: 10560 [2021-07-13 20:02:41,014 INFO L226 Difference]: Without dead ends: 10506 [2021-07-13 20:02:41,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1074.3ms TimeCoverageRelationStatistics Valid=181, Invalid=1889, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:02:41,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10506 states. [2021-07-13 20:02:41,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10506 to 9956. [2021-07-13 20:02:41,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9956 states, 9955 states have (on average 4.521546961325967) internal successors, (45012), 9955 states have internal predecessors, (45012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:41,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9956 states to 9956 states and 45012 transitions. [2021-07-13 20:02:41,242 INFO L78 Accepts]: Start accepts. Automaton has 9956 states and 45012 transitions. Word has length 33 [2021-07-13 20:02:41,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:41,242 INFO L482 AbstractCegarLoop]: Abstraction has 9956 states and 45012 transitions. [2021-07-13 20:02:41,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:41,242 INFO L276 IsEmpty]: Start isEmpty. Operand 9956 states and 45012 transitions. [2021-07-13 20:02:41,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:41,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:41,265 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:41,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-07-13 20:02:41,465 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:41,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:41,466 INFO L82 PathProgramCache]: Analyzing trace with hash 2012117000, now seen corresponding path program 217 times [2021-07-13 20:02:41,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:41,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422739909] [2021-07-13 20:02:41,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:41,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:41,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422739909] [2021-07-13 20:02:41,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422739909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:41,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259980398] [2021-07-13 20:02:41,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:41,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:41,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:41,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:02:41,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:41,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:41,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:41,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 20:02:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:41,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259980398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:41,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:41,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:02:41,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132918438] [2021-07-13 20:02:41,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:02:41,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:41,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:02:41,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:02:41,995 INFO L87 Difference]: Start difference. First operand 9956 states and 45012 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:43,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:43,355 INFO L93 Difference]: Finished difference Result 10386 states and 46734 transitions. [2021-07-13 20:02:43,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:02:43,356 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:43,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:43,389 INFO L225 Difference]: With dead ends: 10386 [2021-07-13 20:02:43,390 INFO L226 Difference]: Without dead ends: 10334 [2021-07-13 20:02:43,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1059.8ms TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:02:43,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10334 states. [2021-07-13 20:02:43,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10334 to 9956. [2021-07-13 20:02:43,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9956 states, 9955 states have (on average 4.521346057257659) internal successors, (45010), 9955 states have internal predecessors, (45010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9956 states to 9956 states and 45010 transitions. [2021-07-13 20:02:43,609 INFO L78 Accepts]: Start accepts. Automaton has 9956 states and 45010 transitions. Word has length 33 [2021-07-13 20:02:43,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:43,609 INFO L482 AbstractCegarLoop]: Abstraction has 9956 states and 45010 transitions. [2021-07-13 20:02:43,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand 9956 states and 45010 transitions. [2021-07-13 20:02:43,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:43,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:43,630 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:43,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-07-13 20:02:43,830 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:43,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:43,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1560871832, now seen corresponding path program 218 times [2021-07-13 20:02:43,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:43,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178618880] [2021-07-13 20:02:43,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:43,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:43,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178618880] [2021-07-13 20:02:43,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178618880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:43,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63804327] [2021-07-13 20:02:43,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:44,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:02:44,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:44,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:44,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:44,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:44,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 20:02:44,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:44,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:44,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:44,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-07-13 20:02:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:44,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63804327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:44,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:44,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:02:44,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351486181] [2021-07-13 20:02:44,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:02:44,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:44,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:02:44,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:02:44,412 INFO L87 Difference]: Start difference. First operand 9956 states and 45010 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:45,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:45,532 INFO L93 Difference]: Finished difference Result 10549 states and 47330 transitions. [2021-07-13 20:02:45,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:02:45,532 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:45,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:45,566 INFO L225 Difference]: With dead ends: 10549 [2021-07-13 20:02:45,566 INFO L226 Difference]: Without dead ends: 10493 [2021-07-13 20:02:45,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 907.5ms TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:02:45,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10493 states. [2021-07-13 20:02:45,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10493 to 9929. [2021-07-13 20:02:45,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9929 states, 9928 states have (on average 4.522562449637389) internal successors, (44900), 9928 states have internal predecessors, (44900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:45,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9929 states to 9929 states and 44900 transitions. [2021-07-13 20:02:45,769 INFO L78 Accepts]: Start accepts. Automaton has 9929 states and 44900 transitions. Word has length 33 [2021-07-13 20:02:45,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:45,770 INFO L482 AbstractCegarLoop]: Abstraction has 9929 states and 44900 transitions. [2021-07-13 20:02:45,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:45,770 INFO L276 IsEmpty]: Start isEmpty. Operand 9929 states and 44900 transitions. [2021-07-13 20:02:45,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:45,790 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:45,790 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:45,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:45,990 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:45,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:45,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1229275904, now seen corresponding path program 1 times [2021-07-13 20:02:45,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:45,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069883702] [2021-07-13 20:02:45,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:46,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:46,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069883702] [2021-07-13 20:02:46,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069883702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:46,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451330849] [2021-07-13 20:02:46,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:46,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:46,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:46,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:02:46,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:46,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:46,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:46,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 20:02:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:46,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451330849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:46,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:46,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:02:46,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642014287] [2021-07-13 20:02:46,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:02:46,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:46,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:02:46,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:02:46,388 INFO L87 Difference]: Start difference. First operand 9929 states and 44900 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:47,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:47,717 INFO L93 Difference]: Finished difference Result 11004 states and 49283 transitions. [2021-07-13 20:02:47,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:02:47,718 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:47,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:47,752 INFO L225 Difference]: With dead ends: 11004 [2021-07-13 20:02:47,753 INFO L226 Difference]: Without dead ends: 10955 [2021-07-13 20:02:47,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 976.5ms TimeCoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:02:47,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10955 states. [2021-07-13 20:02:47,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10955 to 10002. [2021-07-13 20:02:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10002 states, 10001 states have (on average 4.5233476652334765) internal successors, (45238), 10001 states have internal predecessors, (45238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10002 states to 10002 states and 45238 transitions. [2021-07-13 20:02:47,986 INFO L78 Accepts]: Start accepts. Automaton has 10002 states and 45238 transitions. Word has length 33 [2021-07-13 20:02:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:47,986 INFO L482 AbstractCegarLoop]: Abstraction has 10002 states and 45238 transitions. [2021-07-13 20:02:47,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:47,987 INFO L276 IsEmpty]: Start isEmpty. Operand 10002 states and 45238 transitions. [2021-07-13 20:02:48,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:48,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:48,008 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:48,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:48,209 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:48,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:48,209 INFO L82 PathProgramCache]: Analyzing trace with hash 994565066, now seen corresponding path program 2 times [2021-07-13 20:02:48,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:48,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576210121] [2021-07-13 20:02:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:48,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:48,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576210121] [2021-07-13 20:02:48,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576210121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:48,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912569196] [2021-07-13 20:02:48,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:48,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:02:48,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:48,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:48,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:48,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:48,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 20:02:48,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:48,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:48,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:48,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-13 20:02:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:48,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912569196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:48,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:48,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:02:48,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589261865] [2021-07-13 20:02:48,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:02:48,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:48,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:02:48,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:02:48,698 INFO L87 Difference]: Start difference. First operand 10002 states and 45238 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:49,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:49,919 INFO L93 Difference]: Finished difference Result 11153 states and 49890 transitions. [2021-07-13 20:02:49,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:02:49,920 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:49,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:49,955 INFO L225 Difference]: With dead ends: 11153 [2021-07-13 20:02:49,955 INFO L226 Difference]: Without dead ends: 11113 [2021-07-13 20:02:49,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 879.2ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:02:49,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11113 states. [2021-07-13 20:02:50,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11113 to 10002. [2021-07-13 20:02:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10002 states, 10001 states have (on average 4.5233476652334765) internal successors, (45238), 10001 states have internal predecessors, (45238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:50,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10002 states to 10002 states and 45238 transitions. [2021-07-13 20:02:50,176 INFO L78 Accepts]: Start accepts. Automaton has 10002 states and 45238 transitions. Word has length 33 [2021-07-13 20:02:50,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:50,176 INFO L482 AbstractCegarLoop]: Abstraction has 10002 states and 45238 transitions. [2021-07-13 20:02:50,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:50,176 INFO L276 IsEmpty]: Start isEmpty. Operand 10002 states and 45238 transitions. [2021-07-13 20:02:50,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:50,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:50,196 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:50,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:50,397 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:50,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:50,397 INFO L82 PathProgramCache]: Analyzing trace with hash 430967642, now seen corresponding path program 3 times [2021-07-13 20:02:50,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:50,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343856132] [2021-07-13 20:02:50,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:50,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:50,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343856132] [2021-07-13 20:02:50,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343856132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:50,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778426664] [2021-07-13 20:02:50,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:50,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:02:50,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:50,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:50,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:50,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:50,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-07-13 20:02:50,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:50,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:50,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:50,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-07-13 20:02:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:50,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778426664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:50,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:50,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:02:50,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194153790] [2021-07-13 20:02:50,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:02:50,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:50,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:02:50,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:02:50,885 INFO L87 Difference]: Start difference. First operand 10002 states and 45238 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:52,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:52,222 INFO L93 Difference]: Finished difference Result 11171 states and 49912 transitions. [2021-07-13 20:02:52,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:02:52,222 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:52,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:52,256 INFO L225 Difference]: With dead ends: 11171 [2021-07-13 20:02:52,256 INFO L226 Difference]: Without dead ends: 11140 [2021-07-13 20:02:52,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 911.4ms TimeCoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:02:52,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11140 states. [2021-07-13 20:02:52,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11140 to 10005. [2021-07-13 20:02:52,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 4.5225909636145545) internal successors, (45244), 10004 states have internal predecessors, (45244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:52,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 45244 transitions. [2021-07-13 20:02:52,487 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 45244 transitions. Word has length 33 [2021-07-13 20:02:52,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:52,487 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 45244 transitions. [2021-07-13 20:02:52,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:52,487 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 45244 transitions. [2021-07-13 20:02:52,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:52,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:52,512 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:52,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-07-13 20:02:52,713 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:52,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:52,713 INFO L82 PathProgramCache]: Analyzing trace with hash 59742636, now seen corresponding path program 4 times [2021-07-13 20:02:52,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:52,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480758271] [2021-07-13 20:02:52,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:52,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:52,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480758271] [2021-07-13 20:02:52,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480758271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:52,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344297446] [2021-07-13 20:02:52,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:52,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:02:52,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:52,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:52,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:53,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:53,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 20:02:53,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:53,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:53,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:53,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 20:02:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:53,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344297446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:53,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:53,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:02:53,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004615098] [2021-07-13 20:02:53,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:02:53,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:53,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:02:53,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:02:53,159 INFO L87 Difference]: Start difference. First operand 10005 states and 45244 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:54,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:54,356 INFO L93 Difference]: Finished difference Result 11207 states and 50044 transitions. [2021-07-13 20:02:54,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:02:54,356 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:54,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:54,394 INFO L225 Difference]: With dead ends: 11207 [2021-07-13 20:02:54,394 INFO L226 Difference]: Without dead ends: 11184 [2021-07-13 20:02:54,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 864.1ms TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:02:54,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11184 states. [2021-07-13 20:02:54,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11184 to 10079. [2021-07-13 20:02:54,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10079 states, 10078 states have (on average 4.520341337566977) internal successors, (45556), 10078 states have internal predecessors, (45556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:54,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10079 states to 10079 states and 45556 transitions. [2021-07-13 20:02:54,699 INFO L78 Accepts]: Start accepts. Automaton has 10079 states and 45556 transitions. Word has length 33 [2021-07-13 20:02:54,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:54,699 INFO L482 AbstractCegarLoop]: Abstraction has 10079 states and 45556 transitions. [2021-07-13 20:02:54,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:54,699 INFO L276 IsEmpty]: Start isEmpty. Operand 10079 states and 45556 transitions. [2021-07-13 20:02:54,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:54,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:54,727 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:54,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-07-13 20:02:54,927 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:54,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:54,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1608650806, now seen corresponding path program 5 times [2021-07-13 20:02:54,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:54,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492935631] [2021-07-13 20:02:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:55,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:55,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492935631] [2021-07-13 20:02:55,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492935631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:55,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749692525] [2021-07-13 20:02:55,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:55,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:02:55,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:55,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:55,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:55,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:02:55,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:55,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:55,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:55,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-13 20:02:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:55,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749692525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:55,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:55,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:02:55,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289231357] [2021-07-13 20:02:55,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:02:55,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:55,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:02:55,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:02:55,356 INFO L87 Difference]: Start difference. First operand 10079 states and 45556 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:56,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:56,481 INFO L93 Difference]: Finished difference Result 11215 states and 50057 transitions. [2021-07-13 20:02:56,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:02:56,482 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:56,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:56,519 INFO L225 Difference]: With dead ends: 11215 [2021-07-13 20:02:56,519 INFO L226 Difference]: Without dead ends: 11123 [2021-07-13 20:02:56,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 842.9ms TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:02:56,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11123 states. [2021-07-13 20:02:56,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11123 to 10022. [2021-07-13 20:02:56,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10022 states, 10021 states have (on average 4.52230316335695) internal successors, (45318), 10021 states have internal predecessors, (45318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:56,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10022 states to 10022 states and 45318 transitions. [2021-07-13 20:02:56,858 INFO L78 Accepts]: Start accepts. Automaton has 10022 states and 45318 transitions. Word has length 33 [2021-07-13 20:02:56,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:56,858 INFO L482 AbstractCegarLoop]: Abstraction has 10022 states and 45318 transitions. [2021-07-13 20:02:56,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:56,858 INFO L276 IsEmpty]: Start isEmpty. Operand 10022 states and 45318 transitions. [2021-07-13 20:02:56,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:56,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:56,880 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:57,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-07-13 20:02:57,080 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:57,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:57,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1464921280, now seen corresponding path program 6 times [2021-07-13 20:02:57,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:57,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677707503] [2021-07-13 20:02:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:57,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:57,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677707503] [2021-07-13 20:02:57,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677707503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:57,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531101031] [2021-07-13 20:02:57,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:57,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:02:57,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:57,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:57,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:57,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:57,510 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:02:57,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-07-13 20:02:57,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:02:57,546 INFO L628 ElimStorePlain]: treesize reduction 82, result has 22.6 percent of original size [2021-07-13 20:02:57,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:57,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:24 [2021-07-13 20:02:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:57,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531101031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:57,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:57,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:02:57,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658603095] [2021-07-13 20:02:57,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:02:57,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:57,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:02:57,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:02:57,678 INFO L87 Difference]: Start difference. First operand 10022 states and 45318 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:59,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:59,042 INFO L93 Difference]: Finished difference Result 10925 states and 48921 transitions. [2021-07-13 20:02:59,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:02:59,042 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:02:59,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:59,075 INFO L225 Difference]: With dead ends: 10925 [2021-07-13 20:02:59,075 INFO L226 Difference]: Without dead ends: 10864 [2021-07-13 20:02:59,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1122.5ms TimeCoverageRelationStatistics Valid=216, Invalid=1946, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:02:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10864 states. [2021-07-13 20:02:59,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10864 to 9970. [2021-07-13 20:02:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9970 states, 9969 states have (on average 4.523322299127295) internal successors, (45093), 9969 states have internal predecessors, (45093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:59,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9970 states to 9970 states and 45093 transitions. [2021-07-13 20:02:59,326 INFO L78 Accepts]: Start accepts. Automaton has 9970 states and 45093 transitions. Word has length 33 [2021-07-13 20:02:59,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:59,327 INFO L482 AbstractCegarLoop]: Abstraction has 9970 states and 45093 transitions. [2021-07-13 20:02:59,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:59,327 INFO L276 IsEmpty]: Start isEmpty. Operand 9970 states and 45093 transitions. [2021-07-13 20:02:59,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:02:59,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:59,347 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:59,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:59,547 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:59,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:59,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1911888498, now seen corresponding path program 7 times [2021-07-13 20:02:59,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:59,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846663029] [2021-07-13 20:02:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:59,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:59,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846663029] [2021-07-13 20:02:59,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846663029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:59,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542196612] [2021-07-13 20:02:59,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:59,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:02:59,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:59,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:59,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:02:59,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:59,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:59,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:59,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 20:02:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:59,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542196612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:59,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:59,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:02:59,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047294188] [2021-07-13 20:02:59,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:02:59,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:59,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:02:59,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:02:59,932 INFO L87 Difference]: Start difference. First operand 9970 states and 45093 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:01,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:01,161 INFO L93 Difference]: Finished difference Result 11300 states and 50531 transitions. [2021-07-13 20:03:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:03:01,161 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:01,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:01,195 INFO L225 Difference]: With dead ends: 11300 [2021-07-13 20:03:01,195 INFO L226 Difference]: Without dead ends: 11269 [2021-07-13 20:03:01,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 965.7ms TimeCoverageRelationStatistics Valid=458, Invalid=1992, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:03:01,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11269 states. [2021-07-13 20:03:01,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11269 to 10052. [2021-07-13 20:03:01,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10052 states, 10051 states have (on average 4.521838623022584) internal successors, (45449), 10051 states have internal predecessors, (45449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:01,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10052 states to 10052 states and 45449 transitions. [2021-07-13 20:03:01,494 INFO L78 Accepts]: Start accepts. Automaton has 10052 states and 45449 transitions. Word has length 33 [2021-07-13 20:03:01,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:01,494 INFO L482 AbstractCegarLoop]: Abstraction has 10052 states and 45449 transitions. [2021-07-13 20:03:01,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:01,494 INFO L276 IsEmpty]: Start isEmpty. Operand 10052 states and 45449 transitions. [2021-07-13 20:03:01,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:01,515 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:01,515 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:01,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-07-13 20:03:01,715 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:01,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:01,716 INFO L82 PathProgramCache]: Analyzing trace with hash -608615892, now seen corresponding path program 8 times [2021-07-13 20:03:01,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:01,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468535245] [2021-07-13 20:03:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:01,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:01,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468535245] [2021-07-13 20:03:01,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468535245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:01,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423704493] [2021-07-13 20:03:01,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:01,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:03:01,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:01,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:01,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:02,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:02,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:03:02,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:02,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:02,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:02,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 20:03:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:02,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423704493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:02,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:02,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:03:02,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081554323] [2021-07-13 20:03:02,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:03:02,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:02,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:03:02,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:03:02,158 INFO L87 Difference]: Start difference. First operand 10052 states and 45449 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:03,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:03,299 INFO L93 Difference]: Finished difference Result 10700 states and 47984 transitions. [2021-07-13 20:03:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:03:03,300 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:03,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:03,338 INFO L225 Difference]: With dead ends: 10700 [2021-07-13 20:03:03,338 INFO L226 Difference]: Without dead ends: 10683 [2021-07-13 20:03:03,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1002.4ms TimeCoverageRelationStatistics Valid=449, Invalid=1807, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:03:03,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10683 states. [2021-07-13 20:03:03,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10683 to 10052. [2021-07-13 20:03:03,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10052 states, 10051 states have (on average 4.521142174907969) internal successors, (45442), 10051 states have internal predecessors, (45442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:03,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10052 states to 10052 states and 45442 transitions. [2021-07-13 20:03:03,681 INFO L78 Accepts]: Start accepts. Automaton has 10052 states and 45442 transitions. Word has length 33 [2021-07-13 20:03:03,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:03,681 INFO L482 AbstractCegarLoop]: Abstraction has 10052 states and 45442 transitions. [2021-07-13 20:03:03,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:03,681 INFO L276 IsEmpty]: Start isEmpty. Operand 10052 states and 45442 transitions. [2021-07-13 20:03:03,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:03,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:03,707 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:03,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:03,907 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:03,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:03,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1507977964, now seen corresponding path program 9 times [2021-07-13 20:03:03,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:03,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332456602] [2021-07-13 20:03:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:04,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:04,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332456602] [2021-07-13 20:03:04,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332456602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:04,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48278599] [2021-07-13 20:03:04,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:04,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:03:04,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:04,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:04,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:04,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:04,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-13 20:03:04,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:04,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:04,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:04,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-13 20:03:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:04,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48278599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:04,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:04,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:03:04,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605180830] [2021-07-13 20:03:04,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:03:04,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:04,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:03:04,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:03:04,394 INFO L87 Difference]: Start difference. First operand 10052 states and 45442 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:05,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:05,999 INFO L93 Difference]: Finished difference Result 10827 states and 48471 transitions. [2021-07-13 20:03:05,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:03:05,999 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:05,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:06,036 INFO L225 Difference]: With dead ends: 10827 [2021-07-13 20:03:06,036 INFO L226 Difference]: Without dead ends: 10804 [2021-07-13 20:03:06,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1286.3ms TimeCoverageRelationStatistics Valid=377, Invalid=1975, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:03:06,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10804 states. [2021-07-13 20:03:06,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10804 to 10052. [2021-07-13 20:03:06,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10052 states, 10051 states have (on average 4.521142174907969) internal successors, (45442), 10051 states have internal predecessors, (45442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:06,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10052 states to 10052 states and 45442 transitions. [2021-07-13 20:03:06,340 INFO L78 Accepts]: Start accepts. Automaton has 10052 states and 45442 transitions. Word has length 33 [2021-07-13 20:03:06,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:06,340 INFO L482 AbstractCegarLoop]: Abstraction has 10052 states and 45442 transitions. [2021-07-13 20:03:06,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:06,341 INFO L276 IsEmpty]: Start isEmpty. Operand 10052 states and 45442 transitions. [2021-07-13 20:03:06,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:06,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:06,364 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:06,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-07-13 20:03:06,565 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:06,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:06,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1006391030, now seen corresponding path program 10 times [2021-07-13 20:03:06,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:06,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475392581] [2021-07-13 20:03:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:06,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:06,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475392581] [2021-07-13 20:03:06,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475392581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:06,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354650265] [2021-07-13 20:03:06,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:06,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:03:06,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:06,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:06,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:06,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:03:06,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:06,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:06,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:06,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 20:03:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:06,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354650265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:06,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:06,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:03:06,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059508434] [2021-07-13 20:03:06,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:03:06,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:06,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:03:06,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:03:06,968 INFO L87 Difference]: Start difference. First operand 10052 states and 45442 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:07,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:07,981 INFO L93 Difference]: Finished difference Result 11029 states and 49362 transitions. [2021-07-13 20:03:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:03:07,981 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:07,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:08,020 INFO L225 Difference]: With dead ends: 11029 [2021-07-13 20:03:08,021 INFO L226 Difference]: Without dead ends: 10958 [2021-07-13 20:03:08,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 796.7ms TimeCoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:03:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10958 states. [2021-07-13 20:03:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10958 to 10003. [2021-07-13 20:03:08,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10003 states, 10002 states have (on average 4.521995600879824) internal successors, (45229), 10002 states have internal predecessors, (45229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:08,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10003 states to 10003 states and 45229 transitions. [2021-07-13 20:03:08,412 INFO L78 Accepts]: Start accepts. Automaton has 10003 states and 45229 transitions. Word has length 33 [2021-07-13 20:03:08,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:08,412 INFO L482 AbstractCegarLoop]: Abstraction has 10003 states and 45229 transitions. [2021-07-13 20:03:08,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:08,412 INFO L276 IsEmpty]: Start isEmpty. Operand 10003 states and 45229 transitions. [2021-07-13 20:03:08,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:08,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:08,443 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:08,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:08,643 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:08,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:08,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1400826684, now seen corresponding path program 11 times [2021-07-13 20:03:08,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:08,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483553173] [2021-07-13 20:03:08,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:08,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:08,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483553173] [2021-07-13 20:03:08,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483553173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:08,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072439540] [2021-07-13 20:03:08,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:08,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:03:08,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:08,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:08,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:09,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:03:09,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:09,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:09,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:09,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 20:03:09,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:09,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072439540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:09,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:09,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:03:09,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157370691] [2021-07-13 20:03:09,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:03:09,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:09,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:03:09,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:03:09,121 INFO L87 Difference]: Start difference. First operand 10003 states and 45229 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:10,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:10,356 INFO L93 Difference]: Finished difference Result 10904 states and 48996 transitions. [2021-07-13 20:03:10,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:03:10,356 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:10,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:10,401 INFO L225 Difference]: With dead ends: 10904 [2021-07-13 20:03:10,401 INFO L226 Difference]: Without dead ends: 10863 [2021-07-13 20:03:10,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1003.5ms TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:03:10,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10863 states. [2021-07-13 20:03:10,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10863 to 9988. [2021-07-13 20:03:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9988 states, 9987 states have (on average 4.523881045358967) internal successors, (45180), 9987 states have internal predecessors, (45180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:10,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9988 states to 9988 states and 45180 transitions. [2021-07-13 20:03:10,705 INFO L78 Accepts]: Start accepts. Automaton has 9988 states and 45180 transitions. Word has length 33 [2021-07-13 20:03:10,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:10,705 INFO L482 AbstractCegarLoop]: Abstraction has 9988 states and 45180 transitions. [2021-07-13 20:03:10,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:10,706 INFO L276 IsEmpty]: Start isEmpty. Operand 9988 states and 45180 transitions. [2021-07-13 20:03:10,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:10,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:10,734 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:10,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-07-13 20:03:10,934 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:10,935 INFO L82 PathProgramCache]: Analyzing trace with hash 352054282, now seen corresponding path program 12 times [2021-07-13 20:03:10,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:10,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428562619] [2021-07-13 20:03:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:11,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:11,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428562619] [2021-07-13 20:03:11,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428562619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:11,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245782852] [2021-07-13 20:03:11,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:11,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:03:11,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:11,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:11,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:11,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:11,279 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:03:11,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 20:03:11,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:11,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:11,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:11,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-07-13 20:03:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:11,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245782852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:11,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:11,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:03:11,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442740803] [2021-07-13 20:03:11,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:03:11,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:11,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:03:11,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:03:11,527 INFO L87 Difference]: Start difference. First operand 9988 states and 45180 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:12,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:12,898 INFO L93 Difference]: Finished difference Result 10908 states and 48736 transitions. [2021-07-13 20:03:12,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:03:12,899 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:12,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:12,936 INFO L225 Difference]: With dead ends: 10908 [2021-07-13 20:03:12,936 INFO L226 Difference]: Without dead ends: 10877 [2021-07-13 20:03:12,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1040.5ms TimeCoverageRelationStatistics Valid=334, Invalid=2018, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:03:12,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10877 states. [2021-07-13 20:03:13,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10877 to 10058. [2021-07-13 20:03:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10058 states, 10057 states have (on average 4.522720493188824) internal successors, (45485), 10057 states have internal predecessors, (45485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:13,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10058 states to 10058 states and 45485 transitions. [2021-07-13 20:03:13,157 INFO L78 Accepts]: Start accepts. Automaton has 10058 states and 45485 transitions. Word has length 33 [2021-07-13 20:03:13,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:13,157 INFO L482 AbstractCegarLoop]: Abstraction has 10058 states and 45485 transitions. [2021-07-13 20:03:13,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:13,158 INFO L276 IsEmpty]: Start isEmpty. Operand 10058 states and 45485 transitions. [2021-07-13 20:03:13,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:13,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:13,179 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:13,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-07-13 20:03:13,379 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:13,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:13,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1655326888, now seen corresponding path program 13 times [2021-07-13 20:03:13,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:13,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160158015] [2021-07-13 20:03:13,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:13,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:13,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160158015] [2021-07-13 20:03:13,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160158015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:13,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938390279] [2021-07-13 20:03:13,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:13,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:13,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:13,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:03:13,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:13,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:13,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:13,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 20:03:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:13,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938390279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:13,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:13,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:03:13,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537119979] [2021-07-13 20:03:13,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:03:13,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:13,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:03:13,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:03:13,827 INFO L87 Difference]: Start difference. First operand 10058 states and 45485 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:14,915 INFO L93 Difference]: Finished difference Result 11081 states and 49544 transitions. [2021-07-13 20:03:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:03:14,915 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:14,947 INFO L225 Difference]: With dead ends: 11081 [2021-07-13 20:03:14,947 INFO L226 Difference]: Without dead ends: 11058 [2021-07-13 20:03:14,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 896.8ms TimeCoverageRelationStatistics Valid=369, Invalid=1437, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:03:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11058 states. [2021-07-13 20:03:15,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11058 to 10062. [2021-07-13 20:03:15,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10062 states, 10061 states have (on average 4.521618129410595) internal successors, (45492), 10061 states have internal predecessors, (45492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10062 states to 10062 states and 45492 transitions. [2021-07-13 20:03:15,145 INFO L78 Accepts]: Start accepts. Automaton has 10062 states and 45492 transitions. Word has length 33 [2021-07-13 20:03:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:15,146 INFO L482 AbstractCegarLoop]: Abstraction has 10062 states and 45492 transitions. [2021-07-13 20:03:15,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:15,146 INFO L276 IsEmpty]: Start isEmpty. Operand 10062 states and 45492 transitions. [2021-07-13 20:03:15,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:15,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:15,166 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:15,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:15,366 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:15,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:15,366 INFO L82 PathProgramCache]: Analyzing trace with hash -13066554, now seen corresponding path program 14 times [2021-07-13 20:03:15,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:15,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143838015] [2021-07-13 20:03:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:15,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:15,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143838015] [2021-07-13 20:03:15,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143838015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:15,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750300597] [2021-07-13 20:03:15,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:15,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:03:15,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:15,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:15,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:15,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:15,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:03:15,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:15,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:15,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:15,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 20:03:15,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:15,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750300597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:15,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:15,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:03:15,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585991883] [2021-07-13 20:03:15,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:03:15,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:15,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:03:15,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:03:15,806 INFO L87 Difference]: Start difference. First operand 10062 states and 45492 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:17,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:17,004 INFO L93 Difference]: Finished difference Result 10746 states and 48090 transitions. [2021-07-13 20:03:17,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:03:17,004 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:17,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:17,037 INFO L225 Difference]: With dead ends: 10746 [2021-07-13 20:03:17,038 INFO L226 Difference]: Without dead ends: 10728 [2021-07-13 20:03:17,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1037.0ms TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:03:17,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10728 states. [2021-07-13 20:03:17,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10728 to 10058. [2021-07-13 20:03:17,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10058 states, 10057 states have (on average 4.522024460574724) internal successors, (45478), 10057 states have internal predecessors, (45478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:17,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10058 states to 10058 states and 45478 transitions. [2021-07-13 20:03:17,244 INFO L78 Accepts]: Start accepts. Automaton has 10058 states and 45478 transitions. Word has length 33 [2021-07-13 20:03:17,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:17,244 INFO L482 AbstractCegarLoop]: Abstraction has 10058 states and 45478 transitions. [2021-07-13 20:03:17,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:17,244 INFO L276 IsEmpty]: Start isEmpty. Operand 10058 states and 45478 transitions. [2021-07-13 20:03:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:17,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:17,266 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:17,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-07-13 20:03:17,466 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:17,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:17,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1601940368, now seen corresponding path program 15 times [2021-07-13 20:03:17,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:17,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986859815] [2021-07-13 20:03:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:17,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:17,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986859815] [2021-07-13 20:03:17,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986859815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:17,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536005099] [2021-07-13 20:03:17,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:17,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:03:17,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:17,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:17,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:17,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:17,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-13 20:03:17,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:17,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:17,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:17,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-13 20:03:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:17,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536005099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:17,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:17,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:03:17,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148700947] [2021-07-13 20:03:17,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:03:17,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:17,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:03:17,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:03:17,956 INFO L87 Difference]: Start difference. First operand 10058 states and 45478 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:19,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:19,180 INFO L93 Difference]: Finished difference Result 10718 states and 48037 transitions. [2021-07-13 20:03:19,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:03:19,180 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:19,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:19,213 INFO L225 Difference]: With dead ends: 10718 [2021-07-13 20:03:19,213 INFO L226 Difference]: Without dead ends: 10667 [2021-07-13 20:03:19,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1049.4ms TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:03:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10667 states. [2021-07-13 20:03:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10667 to 10009. [2021-07-13 20:03:19,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10009 states, 10008 states have (on average 4.523181454836131) internal successors, (45268), 10008 states have internal predecessors, (45268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:19,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10009 states to 10009 states and 45268 transitions. [2021-07-13 20:03:19,488 INFO L78 Accepts]: Start accepts. Automaton has 10009 states and 45268 transitions. Word has length 33 [2021-07-13 20:03:19,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:19,488 INFO L482 AbstractCegarLoop]: Abstraction has 10009 states and 45268 transitions. [2021-07-13 20:03:19,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:19,488 INFO L276 IsEmpty]: Start isEmpty. Operand 10009 states and 45268 transitions. [2021-07-13 20:03:19,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:19,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:19,508 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:19,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-07-13 20:03:19,709 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:19,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:19,709 INFO L82 PathProgramCache]: Analyzing trace with hash 871286602, now seen corresponding path program 16 times [2021-07-13 20:03:19,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:19,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787994073] [2021-07-13 20:03:19,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:19,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:19,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787994073] [2021-07-13 20:03:19,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787994073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:19,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699882867] [2021-07-13 20:03:19,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:19,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:03:19,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:19,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:19,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:20,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:20,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:03:20,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:20,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:20,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:20,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 20:03:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:20,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699882867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:20,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:20,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:03:20,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984829694] [2021-07-13 20:03:20,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:03:20,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:20,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:03:20,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:03:20,108 INFO L87 Difference]: Start difference. First operand 10009 states and 45268 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:21,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:21,494 INFO L93 Difference]: Finished difference Result 10890 states and 48869 transitions. [2021-07-13 20:03:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:03:21,494 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:21,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:21,526 INFO L225 Difference]: With dead ends: 10890 [2021-07-13 20:03:21,526 INFO L226 Difference]: Without dead ends: 10850 [2021-07-13 20:03:21,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1094.8ms TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:03:21,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10850 states. [2021-07-13 20:03:21,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10850 to 10012. [2021-07-13 20:03:21,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10012 states, 10011 states have (on average 4.5224253321346515) internal successors, (45274), 10011 states have internal predecessors, (45274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:21,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10012 states to 10012 states and 45274 transitions. [2021-07-13 20:03:21,734 INFO L78 Accepts]: Start accepts. Automaton has 10012 states and 45274 transitions. Word has length 33 [2021-07-13 20:03:21,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:21,734 INFO L482 AbstractCegarLoop]: Abstraction has 10012 states and 45274 transitions. [2021-07-13 20:03:21,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:21,734 INFO L276 IsEmpty]: Start isEmpty. Operand 10012 states and 45274 transitions. [2021-07-13 20:03:21,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:21,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:21,756 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:21,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable467 [2021-07-13 20:03:21,956 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:21,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:21,957 INFO L82 PathProgramCache]: Analyzing trace with hash 307689178, now seen corresponding path program 17 times [2021-07-13 20:03:21,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:21,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301346397] [2021-07-13 20:03:21,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:22,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:22,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301346397] [2021-07-13 20:03:22,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301346397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:22,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548708163] [2021-07-13 20:03:22,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:22,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:03:22,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:22,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:22,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:22,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:03:22,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:22,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:22,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:22,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 20:03:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:22,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548708163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:22,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:22,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:03:22,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350181788] [2021-07-13 20:03:22,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:03:22,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:22,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:03:22,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:03:22,425 INFO L87 Difference]: Start difference. First operand 10012 states and 45274 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:23,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:23,923 INFO L93 Difference]: Finished difference Result 11164 states and 50027 transitions. [2021-07-13 20:03:23,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:03:23,923 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:23,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:23,963 INFO L225 Difference]: With dead ends: 11164 [2021-07-13 20:03:23,964 INFO L226 Difference]: Without dead ends: 11113 [2021-07-13 20:03:23,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1238.7ms TimeCoverageRelationStatistics Valid=367, Invalid=1889, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:03:23,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11113 states. [2021-07-13 20:03:24,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11113 to 9988. [2021-07-13 20:03:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9988 states, 9987 states have (on average 4.523881045358967) internal successors, (45180), 9987 states have internal predecessors, (45180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:24,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9988 states to 9988 states and 45180 transitions. [2021-07-13 20:03:24,231 INFO L78 Accepts]: Start accepts. Automaton has 9988 states and 45180 transitions. Word has length 33 [2021-07-13 20:03:24,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:24,232 INFO L482 AbstractCegarLoop]: Abstraction has 9988 states and 45180 transitions. [2021-07-13 20:03:24,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:24,232 INFO L276 IsEmpty]: Start isEmpty. Operand 9988 states and 45180 transitions. [2021-07-13 20:03:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:24,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:24,257 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:24,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-07-13 20:03:24,458 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:24,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:24,458 INFO L82 PathProgramCache]: Analyzing trace with hash 49748224, now seen corresponding path program 18 times [2021-07-13 20:03:24,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:24,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444855409] [2021-07-13 20:03:24,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:24,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:24,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444855409] [2021-07-13 20:03:24,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444855409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:24,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393580270] [2021-07-13 20:03:24,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:24,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:03:24,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:24,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:24,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:24,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:24,864 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:03:24,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 59 [2021-07-13 20:03:24,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:24,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:24,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:24,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:51 [2021-07-13 20:03:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:25,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393580270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:25,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:25,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:03:25,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111043621] [2021-07-13 20:03:25,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:03:25,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:25,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:03:25,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:03:25,142 INFO L87 Difference]: Start difference. First operand 9988 states and 45180 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:26,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:26,817 INFO L93 Difference]: Finished difference Result 11171 states and 49992 transitions. [2021-07-13 20:03:26,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:03:26,817 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:26,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:26,857 INFO L225 Difference]: With dead ends: 11171 [2021-07-13 20:03:26,857 INFO L226 Difference]: Without dead ends: 11152 [2021-07-13 20:03:26,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1236.0ms TimeCoverageRelationStatistics Valid=344, Invalid=2626, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:03:26,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11152 states. [2021-07-13 20:03:27,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11152 to 10088. [2021-07-13 20:03:27,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10088 states, 10087 states have (on average 4.525825319718449) internal successors, (45652), 10087 states have internal predecessors, (45652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:27,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10088 states to 10088 states and 45652 transitions. [2021-07-13 20:03:27,107 INFO L78 Accepts]: Start accepts. Automaton has 10088 states and 45652 transitions. Word has length 33 [2021-07-13 20:03:27,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:27,108 INFO L482 AbstractCegarLoop]: Abstraction has 10088 states and 45652 transitions. [2021-07-13 20:03:27,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:27,108 INFO L276 IsEmpty]: Start isEmpty. Operand 10088 states and 45652 transitions. [2021-07-13 20:03:27,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:27,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:27,133 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:27,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:27,334 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:27,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:27,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1353020830, now seen corresponding path program 19 times [2021-07-13 20:03:27,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:27,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637621927] [2021-07-13 20:03:27,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:27,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:27,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637621927] [2021-07-13 20:03:27,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637621927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:27,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396545072] [2021-07-13 20:03:27,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:27,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:27,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:27,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:03:27,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:27,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:27,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:27,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 20:03:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:27,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396545072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:27,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:27,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:03:27,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727182832] [2021-07-13 20:03:27,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:03:27,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:27,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:03:27,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:03:27,758 INFO L87 Difference]: Start difference. First operand 10088 states and 45652 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:28,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:28,886 INFO L93 Difference]: Finished difference Result 11480 states and 51160 transitions. [2021-07-13 20:03:28,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:03:28,886 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:28,925 INFO L225 Difference]: With dead ends: 11480 [2021-07-13 20:03:28,925 INFO L226 Difference]: Without dead ends: 11465 [2021-07-13 20:03:28,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 772.0ms TimeCoverageRelationStatistics Valid=318, Invalid=1488, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:03:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11465 states. [2021-07-13 20:03:29,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11465 to 10094. [2021-07-13 20:03:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10094 states, 10093 states have (on average 4.525215495888239) internal successors, (45673), 10093 states have internal predecessors, (45673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10094 states to 10094 states and 45673 transitions. [2021-07-13 20:03:29,210 INFO L78 Accepts]: Start accepts. Automaton has 10094 states and 45673 transitions. Word has length 33 [2021-07-13 20:03:29,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:29,210 INFO L482 AbstractCegarLoop]: Abstraction has 10094 states and 45673 transitions. [2021-07-13 20:03:29,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:29,210 INFO L276 IsEmpty]: Start isEmpty. Operand 10094 states and 45673 transitions. [2021-07-13 20:03:29,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:29,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:29,237 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:29,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable473 [2021-07-13 20:03:29,438 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:29,438 INFO L82 PathProgramCache]: Analyzing trace with hash -315372612, now seen corresponding path program 20 times [2021-07-13 20:03:29,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:29,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293909375] [2021-07-13 20:03:29,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:29,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:29,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293909375] [2021-07-13 20:03:29,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293909375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:29,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949972478] [2021-07-13 20:03:29,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:29,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:03:29,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:29,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:03:29,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:29,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:29,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:29,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:29,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2021-07-13 20:03:29,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:29,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:29,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:29,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:30 [2021-07-13 20:03:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:29,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949972478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:29,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:29,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:03:29,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554571873] [2021-07-13 20:03:29,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:03:29,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:29,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:03:29,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:03:29,923 INFO L87 Difference]: Start difference. First operand 10094 states and 45673 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:31,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:31,071 INFO L93 Difference]: Finished difference Result 11006 states and 49259 transitions. [2021-07-13 20:03:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:03:31,072 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:31,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:31,109 INFO L225 Difference]: With dead ends: 11006 [2021-07-13 20:03:31,109 INFO L226 Difference]: Without dead ends: 10992 [2021-07-13 20:03:31,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 781.3ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:03:31,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10992 states. [2021-07-13 20:03:31,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10992 to 10094. [2021-07-13 20:03:31,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10094 states, 10093 states have (on average 4.524918260180323) internal successors, (45670), 10093 states have internal predecessors, (45670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10094 states to 10094 states and 45670 transitions. [2021-07-13 20:03:31,359 INFO L78 Accepts]: Start accepts. Automaton has 10094 states and 45670 transitions. Word has length 33 [2021-07-13 20:03:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:31,359 INFO L482 AbstractCegarLoop]: Abstraction has 10094 states and 45670 transitions. [2021-07-13 20:03:31,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand 10094 states and 45670 transitions. [2021-07-13 20:03:31,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:31,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:31,382 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:31,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-07-13 20:03:31,583 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:31,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:31,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1299634310, now seen corresponding path program 21 times [2021-07-13 20:03:31,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:31,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300530936] [2021-07-13 20:03:31,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:31,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:31,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300530936] [2021-07-13 20:03:31,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300530936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:31,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772926154] [2021-07-13 20:03:31,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:31,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:03:31,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:31,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:31,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:31,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:31,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:03:31,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:31,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:31,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:31,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-07-13 20:03:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:32,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772926154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:32,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:32,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:03:32,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711633655] [2021-07-13 20:03:32,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:03:32,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:32,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:03:32,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:03:32,067 INFO L87 Difference]: Start difference. First operand 10094 states and 45670 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:33,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:33,474 INFO L93 Difference]: Finished difference Result 11095 states and 49617 transitions. [2021-07-13 20:03:33,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:03:33,474 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:33,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:33,603 INFO L225 Difference]: With dead ends: 11095 [2021-07-13 20:03:33,603 INFO L226 Difference]: Without dead ends: 11072 [2021-07-13 20:03:33,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1066.0ms TimeCoverageRelationStatistics Valid=408, Invalid=1754, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:03:33,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11072 states. [2021-07-13 20:03:33,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11072 to 10045. [2021-07-13 20:03:33,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10045 states, 10044 states have (on average 4.525089605734767) internal successors, (45450), 10044 states have internal predecessors, (45450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:33,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10045 states to 10045 states and 45450 transitions. [2021-07-13 20:03:33,901 INFO L78 Accepts]: Start accepts. Automaton has 10045 states and 45450 transitions. Word has length 33 [2021-07-13 20:03:33,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:33,901 INFO L482 AbstractCegarLoop]: Abstraction has 10045 states and 45450 transitions. [2021-07-13 20:03:33,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:33,901 INFO L276 IsEmpty]: Start isEmpty. Operand 10045 states and 45450 transitions. [2021-07-13 20:03:33,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:33,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:33,932 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:34,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-07-13 20:03:34,132 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:34,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:34,133 INFO L82 PathProgramCache]: Analyzing trace with hash -932503890, now seen corresponding path program 22 times [2021-07-13 20:03:34,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:34,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69308510] [2021-07-13 20:03:34,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:34,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:34,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69308510] [2021-07-13 20:03:34,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69308510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:34,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891817434] [2021-07-13 20:03:34,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:34,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:03:34,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:34,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:34,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:34,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:03:34,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:34,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:34,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:34,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 20:03:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:34,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891817434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:34,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:34,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:03:34,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789335966] [2021-07-13 20:03:34,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:03:34,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:34,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:03:34,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:03:34,564 INFO L87 Difference]: Start difference. First operand 10045 states and 45450 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:35,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:35,919 INFO L93 Difference]: Finished difference Result 11215 states and 50280 transitions. [2021-07-13 20:03:35,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:03:35,920 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:35,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:35,958 INFO L225 Difference]: With dead ends: 11215 [2021-07-13 20:03:35,959 INFO L226 Difference]: Without dead ends: 11200 [2021-07-13 20:03:35,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 970.2ms TimeCoverageRelationStatistics Valid=253, Invalid=1817, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:03:35,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11200 states. [2021-07-13 20:03:36,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11200 to 10045. [2021-07-13 20:03:36,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10045 states, 10044 states have (on average 4.525089605734767) internal successors, (45450), 10044 states have internal predecessors, (45450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:36,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10045 states to 10045 states and 45450 transitions. [2021-07-13 20:03:36,300 INFO L78 Accepts]: Start accepts. Automaton has 10045 states and 45450 transitions. Word has length 33 [2021-07-13 20:03:36,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:36,300 INFO L482 AbstractCegarLoop]: Abstraction has 10045 states and 45450 transitions. [2021-07-13 20:03:36,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:36,300 INFO L276 IsEmpty]: Start isEmpty. Operand 10045 states and 45450 transitions. [2021-07-13 20:03:36,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:36,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:36,324 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:36,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-07-13 20:03:36,524 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:36,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:36,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1152088908, now seen corresponding path program 23 times [2021-07-13 20:03:36,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:36,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000584066] [2021-07-13 20:03:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:36,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:36,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000584066] [2021-07-13 20:03:36,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000584066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:36,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285258098] [2021-07-13 20:03:36,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:36,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:03:36,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:36,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:36,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:36,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:36,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:03:36,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:36,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:36,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:36,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:10 [2021-07-13 20:03:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:36,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285258098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:36,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:36,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:03:36,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728284956] [2021-07-13 20:03:36,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:03:36,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:36,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:03:36,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:03:36,925 INFO L87 Difference]: Start difference. First operand 10045 states and 45450 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:38,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:38,031 INFO L93 Difference]: Finished difference Result 11357 states and 50694 transitions. [2021-07-13 20:03:38,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:03:38,031 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:38,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:38,075 INFO L225 Difference]: With dead ends: 11357 [2021-07-13 20:03:38,075 INFO L226 Difference]: Without dead ends: 11343 [2021-07-13 20:03:38,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 791.2ms TimeCoverageRelationStatistics Valid=313, Invalid=1667, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:03:38,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11343 states. [2021-07-13 20:03:38,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11343 to 10030. [2021-07-13 20:03:38,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10030 states, 10029 states have (on average 4.526273805962708) internal successors, (45394), 10029 states have internal predecessors, (45394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:38,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10030 states to 10030 states and 45394 transitions. [2021-07-13 20:03:38,346 INFO L78 Accepts]: Start accepts. Automaton has 10030 states and 45394 transitions. Word has length 33 [2021-07-13 20:03:38,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:38,346 INFO L482 AbstractCegarLoop]: Abstraction has 10030 states and 45394 transitions. [2021-07-13 20:03:38,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 10030 states and 45394 transitions. [2021-07-13 20:03:38,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:38,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:38,368 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:38,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:38,568 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:38,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:38,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1142951876, now seen corresponding path program 24 times [2021-07-13 20:03:38,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:38,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025214231] [2021-07-13 20:03:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:38,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:38,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025214231] [2021-07-13 20:03:38,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025214231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:38,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911168849] [2021-07-13 20:03:38,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:38,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:03:38,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:38,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:38,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:39,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:39,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:39,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:39,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 20:03:39,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:39,132 INFO L628 ElimStorePlain]: treesize reduction 41, result has 47.4 percent of original size [2021-07-13 20:03:39,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:39,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:37 [2021-07-13 20:03:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:39,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911168849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:39,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:39,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 20:03:39,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662935693] [2021-07-13 20:03:39,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:03:39,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:39,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:03:39,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:03:39,240 INFO L87 Difference]: Start difference. First operand 10030 states and 45394 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:40,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:40,698 INFO L93 Difference]: Finished difference Result 10819 states and 48610 transitions. [2021-07-13 20:03:40,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:03:40,698 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:40,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:40,731 INFO L225 Difference]: With dead ends: 10819 [2021-07-13 20:03:40,731 INFO L226 Difference]: Without dead ends: 10804 [2021-07-13 20:03:40,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1130.7ms TimeCoverageRelationStatistics Valid=206, Invalid=2146, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:03:40,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10804 states. [2021-07-13 20:03:40,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10804 to 10015. [2021-07-13 20:03:40,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10015 states, 10014 states have (on average 4.526662672258838) internal successors, (45330), 10014 states have internal predecessors, (45330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10015 states to 10015 states and 45330 transitions. [2021-07-13 20:03:40,945 INFO L78 Accepts]: Start accepts. Automaton has 10015 states and 45330 transitions. Word has length 33 [2021-07-13 20:03:40,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:40,946 INFO L482 AbstractCegarLoop]: Abstraction has 10015 states and 45330 transitions. [2021-07-13 20:03:40,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:40,946 INFO L276 IsEmpty]: Start isEmpty. Operand 10015 states and 45330 transitions. [2021-07-13 20:03:40,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:40,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:40,968 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:41,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-07-13 20:03:41,169 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:41,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:41,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1999035844, now seen corresponding path program 25 times [2021-07-13 20:03:41,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:41,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521093693] [2021-07-13 20:03:41,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:41,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:41,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521093693] [2021-07-13 20:03:41,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521093693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:41,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750774898] [2021-07-13 20:03:41,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:41,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:41,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:41,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:03:41,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:41,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:41,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:41,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 20:03:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:41,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750774898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:41,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:41,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:03:41,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207183215] [2021-07-13 20:03:41,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:03:41,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:41,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:03:41,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:03:41,644 INFO L87 Difference]: Start difference. First operand 10015 states and 45330 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:42,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:42,835 INFO L93 Difference]: Finished difference Result 11513 states and 51424 transitions. [2021-07-13 20:03:42,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:03:42,835 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:42,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:42,869 INFO L225 Difference]: With dead ends: 11513 [2021-07-13 20:03:42,869 INFO L226 Difference]: Without dead ends: 11494 [2021-07-13 20:03:42,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1026.3ms TimeCoverageRelationStatistics Valid=424, Invalid=1928, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:03:42,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11494 states. [2021-07-13 20:03:43,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11494 to 10094. [2021-07-13 20:03:43,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10094 states, 10093 states have (on average 4.5270979887050435) internal successors, (45692), 10093 states have internal predecessors, (45692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:43,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10094 states to 10094 states and 45692 transitions. [2021-07-13 20:03:43,104 INFO L78 Accepts]: Start accepts. Automaton has 10094 states and 45692 transitions. Word has length 33 [2021-07-13 20:03:43,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:43,104 INFO L482 AbstractCegarLoop]: Abstraction has 10094 states and 45692 transitions. [2021-07-13 20:03:43,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:43,104 INFO L276 IsEmpty]: Start isEmpty. Operand 10094 states and 45692 transitions. [2021-07-13 20:03:43,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:43,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:43,124 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:43,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:43,325 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:43,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:43,325 INFO L82 PathProgramCache]: Analyzing trace with hash -992658846, now seen corresponding path program 26 times [2021-07-13 20:03:43,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:43,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490012544] [2021-07-13 20:03:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:43,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:43,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490012544] [2021-07-13 20:03:43,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490012544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:43,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863489636] [2021-07-13 20:03:43,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:43,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:03:43,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:43,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:43,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:43,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:43,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-13 20:03:43,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:43,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:43,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:43,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-13 20:03:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:43,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863489636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:43,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:43,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:03:43,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305443464] [2021-07-13 20:03:43,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:03:43,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:43,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:03:43,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:03:43,873 INFO L87 Difference]: Start difference. First operand 10094 states and 45692 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:45,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:45,273 INFO L93 Difference]: Finished difference Result 10810 states and 48520 transitions. [2021-07-13 20:03:45,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:03:45,274 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:45,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:45,308 INFO L225 Difference]: With dead ends: 10810 [2021-07-13 20:03:45,308 INFO L226 Difference]: Without dead ends: 10797 [2021-07-13 20:03:45,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1205.7ms TimeCoverageRelationStatistics Valid=459, Invalid=1893, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:03:45,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10797 states. [2021-07-13 20:03:45,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10797 to 10094. [2021-07-13 20:03:45,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10094 states, 10093 states have (on average 4.526800752997127) internal successors, (45689), 10093 states have internal predecessors, (45689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:45,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10094 states to 10094 states and 45689 transitions. [2021-07-13 20:03:45,528 INFO L78 Accepts]: Start accepts. Automaton has 10094 states and 45689 transitions. Word has length 33 [2021-07-13 20:03:45,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:45,528 INFO L482 AbstractCegarLoop]: Abstraction has 10094 states and 45689 transitions. [2021-07-13 20:03:45,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:45,529 INFO L276 IsEmpty]: Start isEmpty. Operand 10094 states and 45689 transitions. [2021-07-13 20:03:45,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:45,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:45,551 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:45,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable483 [2021-07-13 20:03:45,751 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:45,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:45,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1892020918, now seen corresponding path program 27 times [2021-07-13 20:03:45,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:45,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791896914] [2021-07-13 20:03:45,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:45,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:45,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791896914] [2021-07-13 20:03:45,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791896914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:45,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000089954] [2021-07-13 20:03:45,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:46,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:03:46,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:46,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:46,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:46,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:46,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:03:46,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:46,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:46,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:46,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 20:03:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:46,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000089954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:46,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:46,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:03:46,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159306239] [2021-07-13 20:03:46,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:03:46,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:46,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:03:46,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:03:46,317 INFO L87 Difference]: Start difference. First operand 10094 states and 45689 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:47,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:47,863 INFO L93 Difference]: Finished difference Result 10942 states and 49034 transitions. [2021-07-13 20:03:47,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:03:47,863 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:47,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:47,898 INFO L225 Difference]: With dead ends: 10942 [2021-07-13 20:03:47,898 INFO L226 Difference]: Without dead ends: 10927 [2021-07-13 20:03:47,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1341.5ms TimeCoverageRelationStatistics Valid=390, Invalid=2060, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:03:47,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10927 states. [2021-07-13 20:03:48,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10927 to 10094. [2021-07-13 20:03:48,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10094 states, 10093 states have (on average 4.526800752997127) internal successors, (45689), 10093 states have internal predecessors, (45689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:48,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10094 states to 10094 states and 45689 transitions. [2021-07-13 20:03:48,136 INFO L78 Accepts]: Start accepts. Automaton has 10094 states and 45689 transitions. Word has length 33 [2021-07-13 20:03:48,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:48,136 INFO L482 AbstractCegarLoop]: Abstraction has 10094 states and 45689 transitions. [2021-07-13 20:03:48,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:48,136 INFO L276 IsEmpty]: Start isEmpty. Operand 10094 states and 45689 transitions. [2021-07-13 20:03:48,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:48,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:48,221 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:48,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-07-13 20:03:48,421 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:48,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:48,421 INFO L82 PathProgramCache]: Analyzing trace with hash 622348076, now seen corresponding path program 28 times [2021-07-13 20:03:48,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:48,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934154302] [2021-07-13 20:03:48,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:48,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:48,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934154302] [2021-07-13 20:03:48,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934154302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:48,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923629381] [2021-07-13 20:03:48,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:48,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:03:48,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:48,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:48,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:48,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:03:48,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:48,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:48,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:48,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 20:03:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:48,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923629381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:48,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:48,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:03:48,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042951747] [2021-07-13 20:03:48,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:03:48,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:48,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:03:48,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:03:48,839 INFO L87 Difference]: Start difference. First operand 10094 states and 45689 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:49,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:49,902 INFO L93 Difference]: Finished difference Result 11278 states and 50360 transitions. [2021-07-13 20:03:49,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:03:49,902 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:49,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:49,941 INFO L225 Difference]: With dead ends: 11278 [2021-07-13 20:03:49,941 INFO L226 Difference]: Without dead ends: 11247 [2021-07-13 20:03:49,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 787.3ms TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:03:49,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11247 states. [2021-07-13 20:03:50,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11247 to 10048. [2021-07-13 20:03:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10048 states, 10047 states have (on average 4.526624863143227) internal successors, (45479), 10047 states have internal predecessors, (45479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10048 states to 10048 states and 45479 transitions. [2021-07-13 20:03:50,179 INFO L78 Accepts]: Start accepts. Automaton has 10048 states and 45479 transitions. Word has length 33 [2021-07-13 20:03:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:50,179 INFO L482 AbstractCegarLoop]: Abstraction has 10048 states and 45479 transitions. [2021-07-13 20:03:50,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:50,180 INFO L276 IsEmpty]: Start isEmpty. Operand 10048 states and 45479 transitions. [2021-07-13 20:03:50,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:50,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:50,201 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:50,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-07-13 20:03:50,401 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:50,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:50,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1016783730, now seen corresponding path program 29 times [2021-07-13 20:03:50,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:50,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010677192] [2021-07-13 20:03:50,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:50,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:50,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010677192] [2021-07-13 20:03:50,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010677192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:50,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507294996] [2021-07-13 20:03:50,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:50,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:03:50,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:50,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:50,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:50,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:03:50,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:50,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:50,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:50,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 20:03:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:50,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507294996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:50,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:50,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:03:50,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783394324] [2021-07-13 20:03:50,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:03:50,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:50,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:03:50,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:03:50,890 INFO L87 Difference]: Start difference. First operand 10048 states and 45479 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:52,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:52,099 INFO L93 Difference]: Finished difference Result 10994 states and 49401 transitions. [2021-07-13 20:03:52,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:03:52,100 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:52,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:52,134 INFO L225 Difference]: With dead ends: 10994 [2021-07-13 20:03:52,134 INFO L226 Difference]: Without dead ends: 10979 [2021-07-13 20:03:52,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1013.0ms TimeCoverageRelationStatistics Valid=240, Invalid=1482, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:03:52,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2021-07-13 20:03:52,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 10024. [2021-07-13 20:03:52,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10024 states, 10023 states have (on average 4.526788386710566) internal successors, (45372), 10023 states have internal predecessors, (45372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10024 states to 10024 states and 45372 transitions. [2021-07-13 20:03:52,354 INFO L78 Accepts]: Start accepts. Automaton has 10024 states and 45372 transitions. Word has length 33 [2021-07-13 20:03:52,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:52,355 INFO L482 AbstractCegarLoop]: Abstraction has 10024 states and 45372 transitions. [2021-07-13 20:03:52,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:52,355 INFO L276 IsEmpty]: Start isEmpty. Operand 10024 states and 45372 transitions. [2021-07-13 20:03:52,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:52,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:52,378 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:52,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-07-13 20:03:52,579 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:52,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:52,579 INFO L82 PathProgramCache]: Analyzing trace with hash -31988672, now seen corresponding path program 30 times [2021-07-13 20:03:52,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:52,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809470888] [2021-07-13 20:03:52,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:52,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:52,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809470888] [2021-07-13 20:03:52,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809470888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:52,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573592321] [2021-07-13 20:03:52,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:52,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:03:52,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:52,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:52,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:52,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:52,927 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:03:52,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 20:03:52,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:52,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:52,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:52,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-07-13 20:03:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:53,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573592321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:53,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:53,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:03:53,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604165358] [2021-07-13 20:03:53,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:03:53,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:53,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:03:53,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:03:53,191 INFO L87 Difference]: Start difference. First operand 10024 states and 45372 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:54,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:54,689 INFO L93 Difference]: Finished difference Result 10967 states and 49098 transitions. [2021-07-13 20:03:54,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:03:54,689 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:54,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:54,726 INFO L225 Difference]: With dead ends: 10967 [2021-07-13 20:03:54,726 INFO L226 Difference]: Without dead ends: 10948 [2021-07-13 20:03:54,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1159.5ms TimeCoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:03:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10948 states. [2021-07-13 20:03:54,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10948 to 10094. [2021-07-13 20:03:54,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10094 states, 10093 states have (on average 4.52739522441296) internal successors, (45695), 10093 states have internal predecessors, (45695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:54,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10094 states to 10094 states and 45695 transitions. [2021-07-13 20:03:54,947 INFO L78 Accepts]: Start accepts. Automaton has 10094 states and 45695 transitions. Word has length 33 [2021-07-13 20:03:54,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:54,947 INFO L482 AbstractCegarLoop]: Abstraction has 10094 states and 45695 transitions. [2021-07-13 20:03:54,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:54,947 INFO L276 IsEmpty]: Start isEmpty. Operand 10094 states and 45695 transitions. [2021-07-13 20:03:54,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:54,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:54,967 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:55,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:55,168 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:55,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:55,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1271283934, now seen corresponding path program 31 times [2021-07-13 20:03:55,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:55,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282853877] [2021-07-13 20:03:55,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:55,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:55,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282853877] [2021-07-13 20:03:55,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282853877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:55,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030679752] [2021-07-13 20:03:55,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:55,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:55,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:55,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:03:55,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:55,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:55,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:55,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 20:03:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:55,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030679752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:55,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:55,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:03:55,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707198006] [2021-07-13 20:03:55,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:03:55,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:55,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:03:55,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:03:55,615 INFO L87 Difference]: Start difference. First operand 10094 states and 45695 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:56,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:56,690 INFO L93 Difference]: Finished difference Result 11355 states and 50696 transitions. [2021-07-13 20:03:56,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:03:56,690 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:56,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:56,724 INFO L225 Difference]: With dead ends: 11355 [2021-07-13 20:03:56,725 INFO L226 Difference]: Without dead ends: 11340 [2021-07-13 20:03:56,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 878.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:03:56,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11340 states. [2021-07-13 20:03:56,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11340 to 10097. [2021-07-13 20:03:56,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10097 states, 10096 states have (on average 4.527040412044374) internal successors, (45705), 10096 states have internal predecessors, (45705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:56,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10097 states to 10097 states and 45705 transitions. [2021-07-13 20:03:56,945 INFO L78 Accepts]: Start accepts. Automaton has 10097 states and 45705 transitions. Word has length 33 [2021-07-13 20:03:56,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:56,945 INFO L482 AbstractCegarLoop]: Abstraction has 10097 states and 45705 transitions. [2021-07-13 20:03:56,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:56,945 INFO L276 IsEmpty]: Start isEmpty. Operand 10097 states and 45705 transitions. [2021-07-13 20:03:56,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:56,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:56,965 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:57,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:57,166 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:57,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:57,166 INFO L82 PathProgramCache]: Analyzing trace with hash -397109508, now seen corresponding path program 32 times [2021-07-13 20:03:57,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:57,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616655674] [2021-07-13 20:03:57,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:57,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:57,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616655674] [2021-07-13 20:03:57,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616655674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:57,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681151868] [2021-07-13 20:03:57,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:57,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:03:57,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:57,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:57,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:57,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:57,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:03:57,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:57,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:57,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:57,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 20:03:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:57,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681151868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:57,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:57,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:03:57,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898359577] [2021-07-13 20:03:57,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:03:57,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:57,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:03:57,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:03:57,648 INFO L87 Difference]: Start difference. First operand 10097 states and 45705 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:58,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:58,871 INFO L93 Difference]: Finished difference Result 10865 states and 48670 transitions. [2021-07-13 20:03:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:03:58,871 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:03:58,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:58,903 INFO L225 Difference]: With dead ends: 10865 [2021-07-13 20:03:58,903 INFO L226 Difference]: Without dead ends: 10851 [2021-07-13 20:03:58,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1095.5ms TimeCoverageRelationStatistics Valid=413, Invalid=1567, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:03:58,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2021-07-13 20:03:59,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10097. [2021-07-13 20:03:59,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10097 states, 10096 states have (on average 4.526743264659271) internal successors, (45702), 10096 states have internal predecessors, (45702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10097 states to 10097 states and 45702 transitions. [2021-07-13 20:03:59,105 INFO L78 Accepts]: Start accepts. Automaton has 10097 states and 45702 transitions. Word has length 33 [2021-07-13 20:03:59,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:59,105 INFO L482 AbstractCegarLoop]: Abstraction has 10097 states and 45702 transitions. [2021-07-13 20:03:59,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:59,105 INFO L276 IsEmpty]: Start isEmpty. Operand 10097 states and 45702 transitions. [2021-07-13 20:03:59,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:03:59,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:59,125 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:59,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:59,326 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:59,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:59,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1217897414, now seen corresponding path program 33 times [2021-07-13 20:03:59,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:59,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376496792] [2021-07-13 20:03:59,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:59,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:59,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376496792] [2021-07-13 20:03:59,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376496792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:59,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669091669] [2021-07-13 20:03:59,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:59,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:03:59,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:59,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:59,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:59,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:59,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-13 20:03:59,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:59,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:59,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:59,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-13 20:03:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:59,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669091669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:59,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:59,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:03:59,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652974357] [2021-07-13 20:03:59,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:03:59,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:59,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:03:59,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:03:59,791 INFO L87 Difference]: Start difference. First operand 10097 states and 45702 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:01,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:01,058 INFO L93 Difference]: Finished difference Result 10842 states and 48625 transitions. [2021-07-13 20:04:01,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:04:01,058 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:01,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:01,090 INFO L225 Difference]: With dead ends: 10842 [2021-07-13 20:04:01,090 INFO L226 Difference]: Without dead ends: 10819 [2021-07-13 20:04:01,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1028.9ms TimeCoverageRelationStatistics Valid=396, Invalid=1496, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:04:01,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10819 states. [2021-07-13 20:04:01,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10819 to 10048. [2021-07-13 20:04:01,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10048 states, 10047 states have (on average 4.526923459739225) internal successors, (45482), 10047 states have internal predecessors, (45482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:01,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10048 states to 10048 states and 45482 transitions. [2021-07-13 20:04:01,289 INFO L78 Accepts]: Start accepts. Automaton has 10048 states and 45482 transitions. Word has length 33 [2021-07-13 20:04:01,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:01,289 INFO L482 AbstractCegarLoop]: Abstraction has 10048 states and 45482 transitions. [2021-07-13 20:04:01,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 10048 states and 45482 transitions. [2021-07-13 20:04:01,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:01,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:01,314 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:01,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-07-13 20:04:01,515 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:01,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:01,515 INFO L82 PathProgramCache]: Analyzing trace with hash 487243648, now seen corresponding path program 34 times [2021-07-13 20:04:01,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:01,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230181264] [2021-07-13 20:04:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:01,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:01,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230181264] [2021-07-13 20:04:01,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230181264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:01,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547776544] [2021-07-13 20:04:01,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:01,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:04:01,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:01,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:01,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:01,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:04:01,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:01,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:01,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:01,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 20:04:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:01,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547776544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:01,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:01,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:04:01,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94132523] [2021-07-13 20:04:01,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:04:01,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:01,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:04:01,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:04:01,948 INFO L87 Difference]: Start difference. First operand 10048 states and 45482 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:03,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:03,488 INFO L93 Difference]: Finished difference Result 11015 states and 49399 transitions. [2021-07-13 20:04:03,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:04:03,489 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:03,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:03,532 INFO L225 Difference]: With dead ends: 11015 [2021-07-13 20:04:03,532 INFO L226 Difference]: Without dead ends: 10996 [2021-07-13 20:04:03,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1057.6ms TimeCoverageRelationStatistics Valid=236, Invalid=1570, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:04:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10996 states. [2021-07-13 20:04:03,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10996 to 10045. [2021-07-13 20:04:03,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10045 states, 10044 states have (on average 4.527279968140183) internal successors, (45472), 10044 states have internal predecessors, (45472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:03,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10045 states to 10045 states and 45472 transitions. [2021-07-13 20:04:03,791 INFO L78 Accepts]: Start accepts. Automaton has 10045 states and 45472 transitions. Word has length 33 [2021-07-13 20:04:03,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:03,791 INFO L482 AbstractCegarLoop]: Abstraction has 10045 states and 45472 transitions. [2021-07-13 20:04:03,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:03,791 INFO L276 IsEmpty]: Start isEmpty. Operand 10045 states and 45472 transitions. [2021-07-13 20:04:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:03,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:03,816 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:04,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-07-13 20:04:04,017 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:04,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:04,017 INFO L82 PathProgramCache]: Analyzing trace with hash -76353776, now seen corresponding path program 35 times [2021-07-13 20:04:04,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:04,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886173822] [2021-07-13 20:04:04,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:04,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:04,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886173822] [2021-07-13 20:04:04,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886173822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:04,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232038639] [2021-07-13 20:04:04,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:04,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:04:04,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:04,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:04,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:04,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:04,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:04:04,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:04,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:04,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:04,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 20:04:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:04,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232038639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:04,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:04,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:04:04,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974688993] [2021-07-13 20:04:04,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:04:04,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:04,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:04:04,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:04:04,452 INFO L87 Difference]: Start difference. First operand 10045 states and 45472 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:05,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:05,912 INFO L93 Difference]: Finished difference Result 11489 states and 51265 transitions. [2021-07-13 20:04:05,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:04:05,912 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:05,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:05,956 INFO L225 Difference]: With dead ends: 11489 [2021-07-13 20:04:05,956 INFO L226 Difference]: Without dead ends: 11466 [2021-07-13 20:04:05,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1081.2ms TimeCoverageRelationStatistics Valid=318, Invalid=1752, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:04:05,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11466 states. [2021-07-13 20:04:06,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11466 to 10033. [2021-07-13 20:04:06,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10033 states, 10032 states have (on average 4.527811004784689) internal successors, (45423), 10032 states have internal predecessors, (45423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:06,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10033 states to 10033 states and 45423 transitions. [2021-07-13 20:04:06,221 INFO L78 Accepts]: Start accepts. Automaton has 10033 states and 45423 transitions. Word has length 33 [2021-07-13 20:04:06,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:06,221 INFO L482 AbstractCegarLoop]: Abstraction has 10033 states and 45423 transitions. [2021-07-13 20:04:06,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:06,221 INFO L276 IsEmpty]: Start isEmpty. Operand 10033 states and 45423 transitions. [2021-07-13 20:04:06,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:06,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:06,245 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:06,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable499,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:06,445 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:06,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:06,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1872903246, now seen corresponding path program 36 times [2021-07-13 20:04:06,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:06,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234057572] [2021-07-13 20:04:06,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:06,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:06,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234057572] [2021-07-13 20:04:06,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234057572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:06,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093953377] [2021-07-13 20:04:06,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:06,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:04:06,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:06,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:06,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:06,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:06,856 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:04:06,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 59 [2021-07-13 20:04:06,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:06,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:06,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:06,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:51 [2021-07-13 20:04:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:07,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093953377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:07,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:07,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:04:07,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184578334] [2021-07-13 20:04:07,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:04:07,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:07,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:04:07,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:04:07,045 INFO L87 Difference]: Start difference. First operand 10033 states and 45423 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:08,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:08,538 INFO L93 Difference]: Finished difference Result 10934 states and 49015 transitions. [2021-07-13 20:04:08,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:04:08,538 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:08,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:08,583 INFO L225 Difference]: With dead ends: 10934 [2021-07-13 20:04:08,583 INFO L226 Difference]: Without dead ends: 10915 [2021-07-13 20:04:08,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 998.8ms TimeCoverageRelationStatistics Valid=240, Invalid=1830, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:04:08,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10915 states. [2021-07-13 20:04:08,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10915 to 10154. [2021-07-13 20:04:08,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 4.529892642568699) internal successors, (45992), 10153 states have internal predecessors, (45992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 45992 transitions. [2021-07-13 20:04:08,844 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 45992 transitions. Word has length 33 [2021-07-13 20:04:08,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:08,844 INFO L482 AbstractCegarLoop]: Abstraction has 10154 states and 45992 transitions. [2021-07-13 20:04:08,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:08,844 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 45992 transitions. [2021-07-13 20:04:08,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:08,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:08,870 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:09,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2021-07-13 20:04:09,070 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:09,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:09,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1118791444, now seen corresponding path program 37 times [2021-07-13 20:04:09,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:09,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340008578] [2021-07-13 20:04:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:09,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:09,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340008578] [2021-07-13 20:04:09,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340008578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:09,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396593884] [2021-07-13 20:04:09,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:09,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:09,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:09,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:04:09,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:09,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:09,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:09,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 20:04:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:09,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396593884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:09,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:09,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:04:09,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417218252] [2021-07-13 20:04:09,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:04:09,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:09,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:04:09,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:04:09,498 INFO L87 Difference]: Start difference. First operand 10154 states and 45992 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:10,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:10,538 INFO L93 Difference]: Finished difference Result 11232 states and 50188 transitions. [2021-07-13 20:04:10,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:04:10,538 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:10,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:10,577 INFO L225 Difference]: With dead ends: 11232 [2021-07-13 20:04:10,577 INFO L226 Difference]: Without dead ends: 11217 [2021-07-13 20:04:10,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 611.1ms TimeCoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:04:10,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11217 states. [2021-07-13 20:04:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11217 to 10163. [2021-07-13 20:04:10,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10163 states, 10162 states have (on average 4.528931312733714) internal successors, (46023), 10162 states have internal predecessors, (46023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:10,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10163 states to 10163 states and 46023 transitions. [2021-07-13 20:04:10,900 INFO L78 Accepts]: Start accepts. Automaton has 10163 states and 46023 transitions. Word has length 33 [2021-07-13 20:04:10,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:10,900 INFO L482 AbstractCegarLoop]: Abstraction has 10163 states and 46023 transitions. [2021-07-13 20:04:10,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:10,900 INFO L276 IsEmpty]: Start isEmpty. Operand 10163 states and 46023 transitions. [2021-07-13 20:04:10,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:10,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:10,925 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:11,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:11,125 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:11,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:11,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1507782410, now seen corresponding path program 38 times [2021-07-13 20:04:11,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:11,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617684639] [2021-07-13 20:04:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:11,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:11,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617684639] [2021-07-13 20:04:11,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617684639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:11,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219429695] [2021-07-13 20:04:11,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:11,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:04:11,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:11,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:04:11,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:11,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:11,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:04:11,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:11,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:11,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:11,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 20:04:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:11,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219429695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:11,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:11,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:04:11,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276892202] [2021-07-13 20:04:11,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:04:11,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:11,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:04:11,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:04:11,609 INFO L87 Difference]: Start difference. First operand 10163 states and 46023 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:12,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:12,424 INFO L93 Difference]: Finished difference Result 10788 states and 48389 transitions. [2021-07-13 20:04:12,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:04:12,424 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:12,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:12,465 INFO L225 Difference]: With dead ends: 10788 [2021-07-13 20:04:12,465 INFO L226 Difference]: Without dead ends: 10774 [2021-07-13 20:04:12,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 625.7ms TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:04:12,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10774 states. [2021-07-13 20:04:12,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10774 to 10163. [2021-07-13 20:04:12,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10163 states, 10162 states have (on average 4.528636095256839) internal successors, (46020), 10162 states have internal predecessors, (46020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:12,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10163 states to 10163 states and 46020 transitions. [2021-07-13 20:04:12,727 INFO L78 Accepts]: Start accepts. Automaton has 10163 states and 46020 transitions. Word has length 33 [2021-07-13 20:04:12,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:12,727 INFO L482 AbstractCegarLoop]: Abstraction has 10163 states and 46020 transitions. [2021-07-13 20:04:12,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:12,727 INFO L276 IsEmpty]: Start isEmpty. Operand 10163 states and 46020 transitions. [2021-07-13 20:04:12,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:12,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:12,751 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:12,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable505 [2021-07-13 20:04:12,951 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:12,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:12,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1172177964, now seen corresponding path program 39 times [2021-07-13 20:04:12,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:12,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774813741] [2021-07-13 20:04:12,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:12,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:13,131 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-07-13 20:04:13,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:13,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:13,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774813741] [2021-07-13 20:04:13,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774813741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:13,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673448895] [2021-07-13 20:04:13,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:13,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:04:13,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:13,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:04:13,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:13,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:13,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:13,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-07-13 20:04:13,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:13,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:13,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:13,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:30 [2021-07-13 20:04:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:13,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673448895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:13,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:13,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:04:13,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813335443] [2021-07-13 20:04:13,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:04:13,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:13,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:04:13,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:04:13,541 INFO L87 Difference]: Start difference. First operand 10163 states and 46020 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:14,489 INFO L93 Difference]: Finished difference Result 10807 states and 48450 transitions. [2021-07-13 20:04:14,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:04:14,489 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:14,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:14,538 INFO L225 Difference]: With dead ends: 10807 [2021-07-13 20:04:14,538 INFO L226 Difference]: Without dead ends: 10784 [2021-07-13 20:04:14,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 784.6ms TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:04:14,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10784 states. [2021-07-13 20:04:14,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10784 to 10114. [2021-07-13 20:04:14,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10114 states, 10113 states have (on average 4.528824285573025) internal successors, (45800), 10113 states have internal predecessors, (45800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:14,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10114 states to 10114 states and 45800 transitions. [2021-07-13 20:04:14,832 INFO L78 Accepts]: Start accepts. Automaton has 10114 states and 45800 transitions. Word has length 33 [2021-07-13 20:04:14,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:14,833 INFO L482 AbstractCegarLoop]: Abstraction has 10114 states and 45800 transitions. [2021-07-13 20:04:14,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:14,833 INFO L276 IsEmpty]: Start isEmpty. Operand 10114 states and 45800 transitions. [2021-07-13 20:04:14,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:14,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:14,858 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:15,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:15,061 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:15,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:15,061 INFO L82 PathProgramCache]: Analyzing trace with hash 890651132, now seen corresponding path program 40 times [2021-07-13 20:04:15,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:15,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115357979] [2021-07-13 20:04:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:15,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:15,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115357979] [2021-07-13 20:04:15,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115357979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:15,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084035846] [2021-07-13 20:04:15,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:15,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:04:15,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:15,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:15,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:15,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:04:15,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:15,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:15,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:15,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 20:04:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:15,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084035846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:15,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:15,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:04:15,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155364760] [2021-07-13 20:04:15,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:04:15,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:15,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:04:15,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:04:15,575 INFO L87 Difference]: Start difference. First operand 10114 states and 45800 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:16,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:16,865 INFO L93 Difference]: Finished difference Result 10855 states and 48853 transitions. [2021-07-13 20:04:16,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:04:16,865 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:16,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:16,899 INFO L225 Difference]: With dead ends: 10855 [2021-07-13 20:04:16,900 INFO L226 Difference]: Without dead ends: 10840 [2021-07-13 20:04:16,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 981.1ms TimeCoverageRelationStatistics Valid=258, Invalid=1812, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:04:16,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10840 states. [2021-07-13 20:04:17,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10840 to 10114. [2021-07-13 20:04:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10114 states, 10113 states have (on average 4.528824285573025) internal successors, (45800), 10113 states have internal predecessors, (45800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10114 states to 10114 states and 45800 transitions. [2021-07-13 20:04:17,120 INFO L78 Accepts]: Start accepts. Automaton has 10114 states and 45800 transitions. Word has length 33 [2021-07-13 20:04:17,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:17,120 INFO L482 AbstractCegarLoop]: Abstraction has 10114 states and 45800 transitions. [2021-07-13 20:04:17,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:17,120 INFO L276 IsEmpty]: Start isEmpty. Operand 10114 states and 45800 transitions. [2021-07-13 20:04:17,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:17,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:17,141 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:17,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-07-13 20:04:17,342 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:17,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:17,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1319723366, now seen corresponding path program 41 times [2021-07-13 20:04:17,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:17,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468161682] [2021-07-13 20:04:17,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:17,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:17,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468161682] [2021-07-13 20:04:17,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468161682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:17,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122888588] [2021-07-13 20:04:17,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:17,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:04:17,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:17,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:04:17,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:17,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:17,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:17,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:17,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:04:17,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:17,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:17,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:17,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:20 [2021-07-13 20:04:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:17,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122888588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:17,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:17,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:04:17,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979683567] [2021-07-13 20:04:17,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:04:17,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:17,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:04:17,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:04:17,829 INFO L87 Difference]: Start difference. First operand 10114 states and 45800 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:18,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:18,767 INFO L93 Difference]: Finished difference Result 11031 states and 49411 transitions. [2021-07-13 20:04:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:04:18,768 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:18,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:18,802 INFO L225 Difference]: With dead ends: 11031 [2021-07-13 20:04:18,802 INFO L226 Difference]: Without dead ends: 11017 [2021-07-13 20:04:18,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 694.2ms TimeCoverageRelationStatistics Valid=241, Invalid=1481, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:04:18,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11017 states. [2021-07-13 20:04:18,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11017 to 10090. [2021-07-13 20:04:19,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10090 states, 10089 states have (on average 4.528991971454059) internal successors, (45693), 10089 states have internal predecessors, (45693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:19,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10090 states to 10090 states and 45693 transitions. [2021-07-13 20:04:19,038 INFO L78 Accepts]: Start accepts. Automaton has 10090 states and 45693 transitions. Word has length 33 [2021-07-13 20:04:19,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:19,038 INFO L482 AbstractCegarLoop]: Abstraction has 10090 states and 45693 transitions. [2021-07-13 20:04:19,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:19,038 INFO L276 IsEmpty]: Start isEmpty. Operand 10090 states and 45693 transitions. [2021-07-13 20:04:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:19,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:19,059 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:19,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:19,260 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:19,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:19,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1328860398, now seen corresponding path program 42 times [2021-07-13 20:04:19,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:19,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218931203] [2021-07-13 20:04:19,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:19,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:19,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218931203] [2021-07-13 20:04:19,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218931203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:19,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730145557] [2021-07-13 20:04:19,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:19,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:04:19,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:19,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:19,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:19,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:19,725 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:04:19,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 20:04:19,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:04:19,747 INFO L628 ElimStorePlain]: treesize reduction 46, result has 30.3 percent of original size [2021-07-13 20:04:19,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:19,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:20 [2021-07-13 20:04:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:19,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730145557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:19,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:19,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 20:04:19,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905929053] [2021-07-13 20:04:19,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:04:19,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:19,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:04:19,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:04:19,842 INFO L87 Difference]: Start difference. First operand 10090 states and 45693 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:21,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:21,152 INFO L93 Difference]: Finished difference Result 10575 states and 47523 transitions. [2021-07-13 20:04:21,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:04:21,152 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:21,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:21,186 INFO L225 Difference]: With dead ends: 10575 [2021-07-13 20:04:21,187 INFO L226 Difference]: Without dead ends: 10560 [2021-07-13 20:04:21,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 956.3ms TimeCoverageRelationStatistics Valid=171, Invalid=1809, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:04:21,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10560 states. [2021-07-13 20:04:21,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10560 to 10069. [2021-07-13 20:04:21,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10069 states, 10068 states have (on average 4.527810885975367) internal successors, (45586), 10068 states have internal predecessors, (45586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10069 states to 10069 states and 45586 transitions. [2021-07-13 20:04:21,423 INFO L78 Accepts]: Start accepts. Automaton has 10069 states and 45586 transitions. Word has length 33 [2021-07-13 20:04:21,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:21,423 INFO L482 AbstractCegarLoop]: Abstraction has 10069 states and 45586 transitions. [2021-07-13 20:04:21,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:21,423 INFO L276 IsEmpty]: Start isEmpty. Operand 10069 states and 45586 transitions. [2021-07-13 20:04:21,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:21,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:21,443 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:21,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:21,644 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:21,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:21,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1656499226, now seen corresponding path program 43 times [2021-07-13 20:04:21,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:21,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117741702] [2021-07-13 20:04:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:21,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:21,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117741702] [2021-07-13 20:04:21,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117741702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:21,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708734191] [2021-07-13 20:04:21,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:21,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:21,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:22,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:22,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 20:04:22,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:22,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:22,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:22,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-07-13 20:04:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:22,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708734191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:22,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:22,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:04:22,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793550884] [2021-07-13 20:04:22,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:04:22,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:22,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:04:22,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:04:22,116 INFO L87 Difference]: Start difference. First operand 10069 states and 45586 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:23,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:23,291 INFO L93 Difference]: Finished difference Result 10598 states and 47787 transitions. [2021-07-13 20:04:23,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:04:23,292 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:23,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:23,326 INFO L225 Difference]: With dead ends: 10598 [2021-07-13 20:04:23,327 INFO L226 Difference]: Without dead ends: 10583 [2021-07-13 20:04:23,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 819.3ms TimeCoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:04:23,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10583 states. [2021-07-13 20:04:23,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10583 to 10069. [2021-07-13 20:04:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10069 states, 10068 states have (on average 4.527810885975367) internal successors, (45586), 10068 states have internal predecessors, (45586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:23,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10069 states to 10069 states and 45586 transitions. [2021-07-13 20:04:23,542 INFO L78 Accepts]: Start accepts. Automaton has 10069 states and 45586 transitions. Word has length 33 [2021-07-13 20:04:23,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:23,542 INFO L482 AbstractCegarLoop]: Abstraction has 10069 states and 45586 transitions. [2021-07-13 20:04:23,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:23,543 INFO L276 IsEmpty]: Start isEmpty. Operand 10069 states and 45586 transitions. [2021-07-13 20:04:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:23,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:23,564 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:23,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:23,764 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:23,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1591865720, now seen corresponding path program 44 times [2021-07-13 20:04:23,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:23,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139916437] [2021-07-13 20:04:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:23,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:23,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139916437] [2021-07-13 20:04:23,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139916437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:23,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346420983] [2021-07-13 20:04:23,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:23,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:04:23,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:23,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:04:23,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:24,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:24,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:24,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-07-13 20:04:24,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:24,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:24,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:24,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:39 [2021-07-13 20:04:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:24,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346420983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:24,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:24,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:04:24,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418581504] [2021-07-13 20:04:24,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:04:24,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:24,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:04:24,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:04:24,312 INFO L87 Difference]: Start difference. First operand 10069 states and 45586 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:25,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:25,185 INFO L93 Difference]: Finished difference Result 10401 states and 46829 transitions. [2021-07-13 20:04:25,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:04:25,185 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:25,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:25,223 INFO L225 Difference]: With dead ends: 10401 [2021-07-13 20:04:25,223 INFO L226 Difference]: Without dead ends: 10386 [2021-07-13 20:04:25,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 598.9ms TimeCoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:04:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10386 states. [2021-07-13 20:04:25,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10386 to 10051. [2021-07-13 20:04:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10051 states, 10050 states have (on average 4.5289552238805975) internal successors, (45516), 10050 states have internal predecessors, (45516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:25,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10051 states to 10051 states and 45516 transitions. [2021-07-13 20:04:25,443 INFO L78 Accepts]: Start accepts. Automaton has 10051 states and 45516 transitions. Word has length 33 [2021-07-13 20:04:25,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:25,443 INFO L482 AbstractCegarLoop]: Abstraction has 10051 states and 45516 transitions. [2021-07-13 20:04:25,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:25,444 INFO L276 IsEmpty]: Start isEmpty. Operand 10051 states and 45516 transitions. [2021-07-13 20:04:25,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:25,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:25,468 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:25,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-07-13 20:04:25,668 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:25,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:25,668 INFO L82 PathProgramCache]: Analyzing trace with hash -26504246, now seen corresponding path program 45 times [2021-07-13 20:04:25,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:25,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394944445] [2021-07-13 20:04:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:25,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:25,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394944445] [2021-07-13 20:04:25,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394944445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:25,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29514248] [2021-07-13 20:04:25,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:25,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:04:25,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:25,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:25,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:25,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:25,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:04:25,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:26,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:26,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:26,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-07-13 20:04:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:26,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29514248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:26,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:26,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:04:26,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291533283] [2021-07-13 20:04:26,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:04:26,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:26,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:04:26,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:04:26,135 INFO L87 Difference]: Start difference. First operand 10051 states and 45516 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:27,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:27,690 INFO L93 Difference]: Finished difference Result 11309 states and 50648 transitions. [2021-07-13 20:04:27,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:04:27,690 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:27,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:27,726 INFO L225 Difference]: With dead ends: 11309 [2021-07-13 20:04:27,726 INFO L226 Difference]: Without dead ends: 11290 [2021-07-13 20:04:27,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1126.6ms TimeCoverageRelationStatistics Valid=342, Invalid=1820, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:04:27,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11290 states. [2021-07-13 20:04:27,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11290 to 10163. [2021-07-13 20:04:27,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10163 states, 10162 states have (on average 4.530899429246212) internal successors, (46043), 10162 states have internal predecessors, (46043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:27,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10163 states to 10163 states and 46043 transitions. [2021-07-13 20:04:27,958 INFO L78 Accepts]: Start accepts. Automaton has 10163 states and 46043 transitions. Word has length 33 [2021-07-13 20:04:27,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:27,958 INFO L482 AbstractCegarLoop]: Abstraction has 10163 states and 46043 transitions. [2021-07-13 20:04:27,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:27,958 INFO L276 IsEmpty]: Start isEmpty. Operand 10163 states and 46043 transitions. [2021-07-13 20:04:27,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:27,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:27,978 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:28,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2021-07-13 20:04:28,179 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:28,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:28,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1276768360, now seen corresponding path program 46 times [2021-07-13 20:04:28,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:28,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233158389] [2021-07-13 20:04:28,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:28,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:28,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233158389] [2021-07-13 20:04:28,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233158389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:28,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87677418] [2021-07-13 20:04:28,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:28,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:04:28,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:28,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:28,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:28,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:28,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:04:28,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:28,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:28,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:28,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:10 [2021-07-13 20:04:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:28,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87677418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:28,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:28,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:04:28,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716277681] [2021-07-13 20:04:28,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:04:28,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:28,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:04:28,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:04:28,577 INFO L87 Difference]: Start difference. First operand 10163 states and 46043 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:29,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:29,670 INFO L93 Difference]: Finished difference Result 11608 states and 51632 transitions. [2021-07-13 20:04:29,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:04:29,671 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:29,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:29,709 INFO L225 Difference]: With dead ends: 11608 [2021-07-13 20:04:29,709 INFO L226 Difference]: Without dead ends: 11584 [2021-07-13 20:04:29,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 714.3ms TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:04:29,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11584 states. [2021-07-13 20:04:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11584 to 10199. [2021-07-13 20:04:29,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10199 states, 10198 states have (on average 4.5318689939203765) internal successors, (46216), 10198 states have internal predecessors, (46216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10199 states to 10199 states and 46216 transitions. [2021-07-13 20:04:29,962 INFO L78 Accepts]: Start accepts. Automaton has 10199 states and 46216 transitions. Word has length 33 [2021-07-13 20:04:29,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:29,963 INFO L482 AbstractCegarLoop]: Abstraction has 10199 states and 46216 transitions. [2021-07-13 20:04:29,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:29,963 INFO L276 IsEmpty]: Start isEmpty. Operand 10199 states and 46216 transitions. [2021-07-13 20:04:29,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:29,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:29,985 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:30,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:30,186 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:30,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:30,186 INFO L82 PathProgramCache]: Analyzing trace with hash -391625082, now seen corresponding path program 47 times [2021-07-13 20:04:30,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:30,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122202902] [2021-07-13 20:04:30,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:30,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:30,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:30,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122202902] [2021-07-13 20:04:30,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122202902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:30,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076972598] [2021-07-13 20:04:30,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:30,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:04:30,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:30,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:30,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:30,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:30,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:04:30,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:30,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:30,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:30,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:10 [2021-07-13 20:04:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:30,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076972598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:30,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:30,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:04:30,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193291413] [2021-07-13 20:04:30,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:04:30,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:30,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:04:30,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:04:30,579 INFO L87 Difference]: Start difference. First operand 10199 states and 46216 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:31,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:31,708 INFO L93 Difference]: Finished difference Result 11568 states and 51550 transitions. [2021-07-13 20:04:31,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:04:31,708 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:31,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:31,747 INFO L225 Difference]: With dead ends: 11568 [2021-07-13 20:04:31,748 INFO L226 Difference]: Without dead ends: 11528 [2021-07-13 20:04:31,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 709.5ms TimeCoverageRelationStatistics Valid=304, Invalid=1676, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:04:31,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11528 states. [2021-07-13 20:04:31,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11528 to 10220. [2021-07-13 20:04:31,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10220 states, 10219 states have (on average 4.531754574811625) internal successors, (46310), 10219 states have internal predecessors, (46310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:31,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10220 states to 10220 states and 46310 transitions. [2021-07-13 20:04:31,977 INFO L78 Accepts]: Start accepts. Automaton has 10220 states and 46310 transitions. Word has length 33 [2021-07-13 20:04:31,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:31,977 INFO L482 AbstractCegarLoop]: Abstraction has 10220 states and 46310 transitions. [2021-07-13 20:04:31,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:31,977 INFO L276 IsEmpty]: Start isEmpty. Operand 10220 states and 46310 transitions. [2021-07-13 20:04:31,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:31,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:31,998 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:32,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-07-13 20:04:32,199 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:32,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:32,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1008756360, now seen corresponding path program 48 times [2021-07-13 20:04:32,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:32,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600401560] [2021-07-13 20:04:32,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:32,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:32,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600401560] [2021-07-13 20:04:32,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600401560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:32,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680287998] [2021-07-13 20:04:32,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:32,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:04:32,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:32,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:04:32,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:32,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:32,589 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:04:32,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 59 [2021-07-13 20:04:32,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:32,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:32,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:32,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:54 [2021-07-13 20:04:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:32,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680287998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:32,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:32,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 20:04:32,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244577589] [2021-07-13 20:04:32,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:04:32,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:32,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:04:32,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:04:32,775 INFO L87 Difference]: Start difference. First operand 10220 states and 46310 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:34,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:34,247 INFO L93 Difference]: Finished difference Result 10863 states and 48785 transitions. [2021-07-13 20:04:34,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:04:34,248 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:34,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:34,280 INFO L225 Difference]: With dead ends: 10863 [2021-07-13 20:04:34,280 INFO L226 Difference]: Without dead ends: 10833 [2021-07-13 20:04:34,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1089.9ms TimeCoverageRelationStatistics Valid=223, Invalid=2227, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:04:34,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10833 states. [2021-07-13 20:04:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10833 to 10199. [2021-07-13 20:04:34,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10199 states, 10198 states have (on average 4.5315748185918805) internal successors, (46213), 10198 states have internal predecessors, (46213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:34,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10199 states to 10199 states and 46213 transitions. [2021-07-13 20:04:34,494 INFO L78 Accepts]: Start accepts. Automaton has 10199 states and 46213 transitions. Word has length 33 [2021-07-13 20:04:34,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:34,494 INFO L482 AbstractCegarLoop]: Abstraction has 10199 states and 46213 transitions. [2021-07-13 20:04:34,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:34,494 INFO L276 IsEmpty]: Start isEmpty. Operand 10199 states and 46213 transitions. [2021-07-13 20:04:34,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:34,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:34,516 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:34,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-07-13 20:04:34,717 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:34,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:34,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1066699406, now seen corresponding path program 49 times [2021-07-13 20:04:34,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:34,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143632853] [2021-07-13 20:04:34,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:34,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:34,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143632853] [2021-07-13 20:04:34,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143632853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:34,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525852634] [2021-07-13 20:04:34,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:34,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:34,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:35,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:35,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 20:04:35,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:35,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:35,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:35,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-07-13 20:04:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:35,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525852634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:35,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:35,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:04:35,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744287830] [2021-07-13 20:04:35,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:04:35,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:35,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:04:35,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:04:35,145 INFO L87 Difference]: Start difference. First operand 10199 states and 46213 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:36,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:36,615 INFO L93 Difference]: Finished difference Result 11007 states and 49496 transitions. [2021-07-13 20:04:36,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:04:36,615 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:36,651 INFO L225 Difference]: With dead ends: 11007 [2021-07-13 20:04:36,651 INFO L226 Difference]: Without dead ends: 10977 [2021-07-13 20:04:36,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 939.7ms TimeCoverageRelationStatistics Valid=223, Invalid=1939, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:04:36,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10977 states. [2021-07-13 20:04:36,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10977 to 10202. [2021-07-13 20:04:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10202 states, 10201 states have (on average 4.531320458778551) internal successors, (46224), 10201 states have internal predecessors, (46224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:36,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 46224 transitions. [2021-07-13 20:04:36,904 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 46224 transitions. Word has length 33 [2021-07-13 20:04:36,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:36,904 INFO L482 AbstractCegarLoop]: Abstraction has 10202 states and 46224 transitions. [2021-07-13 20:04:36,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:36,904 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 46224 transitions. [2021-07-13 20:04:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:36,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:36,925 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:37,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable525,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:37,126 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:37,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:37,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1500728752, now seen corresponding path program 50 times [2021-07-13 20:04:37,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:37,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621007004] [2021-07-13 20:04:37,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:37,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:37,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621007004] [2021-07-13 20:04:37,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621007004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:37,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485121649] [2021-07-13 20:04:37,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:37,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:04:37,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:37,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:04:37,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:37,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:37,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:37,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-07-13 20:04:37,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:37,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:37,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:37,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:52 [2021-07-13 20:04:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:37,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485121649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:37,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:37,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:04:37,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122356816] [2021-07-13 20:04:37,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:04:37,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:37,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:04:37,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:04:37,741 INFO L87 Difference]: Start difference. First operand 10202 states and 46224 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:38,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:38,957 INFO L93 Difference]: Finished difference Result 10942 states and 49103 transitions. [2021-07-13 20:04:38,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:04:38,958 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:38,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:38,993 INFO L225 Difference]: With dead ends: 10942 [2021-07-13 20:04:38,993 INFO L226 Difference]: Without dead ends: 10912 [2021-07-13 20:04:38,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 866.9ms TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:04:39,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10912 states. [2021-07-13 20:04:39,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10912 to 10175. [2021-07-13 20:04:39,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10175 states, 10174 states have (on average 4.530764694318852) internal successors, (46096), 10174 states have internal predecessors, (46096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:39,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10175 states to 10175 states and 46096 transitions. [2021-07-13 20:04:39,201 INFO L78 Accepts]: Start accepts. Automaton has 10175 states and 46096 transitions. Word has length 33 [2021-07-13 20:04:39,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:39,201 INFO L482 AbstractCegarLoop]: Abstraction has 10175 states and 46096 transitions. [2021-07-13 20:04:39,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:39,201 INFO L276 IsEmpty]: Start isEmpty. Operand 10175 states and 46096 transitions. [2021-07-13 20:04:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:39,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:39,222 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:39,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:39,422 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:39,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:39,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1922783374, now seen corresponding path program 51 times [2021-07-13 20:04:39,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:39,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801234368] [2021-07-13 20:04:39,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:39,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:39,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801234368] [2021-07-13 20:04:39,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801234368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:39,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429010977] [2021-07-13 20:04:39,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:39,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:04:39,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:39,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:39,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:39,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:39,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:04:39,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:39,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:39,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:39,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 20:04:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:39,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429010977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:39,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:39,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:04:39,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296359945] [2021-07-13 20:04:39,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:04:39,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:39,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:04:39,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:04:39,931 INFO L87 Difference]: Start difference. First operand 10175 states and 46096 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:41,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:41,510 INFO L93 Difference]: Finished difference Result 11205 states and 50278 transitions. [2021-07-13 20:04:41,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:04:41,511 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:41,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:41,547 INFO L225 Difference]: With dead ends: 11205 [2021-07-13 20:04:41,547 INFO L226 Difference]: Without dead ends: 11186 [2021-07-13 20:04:41,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1358.8ms TimeCoverageRelationStatistics Valid=378, Invalid=1878, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:04:41,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11186 states. [2021-07-13 20:04:41,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11186 to 10254. [2021-07-13 20:04:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10254 states, 10253 states have (on average 4.531161611235736) internal successors, (46458), 10253 states have internal predecessors, (46458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:41,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10254 states to 10254 states and 46458 transitions. [2021-07-13 20:04:41,772 INFO L78 Accepts]: Start accepts. Automaton has 10254 states and 46458 transitions. Word has length 33 [2021-07-13 20:04:41,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:41,772 INFO L482 AbstractCegarLoop]: Abstraction has 10254 states and 46458 transitions. [2021-07-13 20:04:41,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:41,772 INFO L276 IsEmpty]: Start isEmpty. Operand 10254 states and 46458 transitions. [2021-07-13 20:04:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:41,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:41,792 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:41,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:41,993 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:41,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:41,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1068911316, now seen corresponding path program 52 times [2021-07-13 20:04:41,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:41,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729921448] [2021-07-13 20:04:41,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:42,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:42,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729921448] [2021-07-13 20:04:42,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729921448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:42,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146092732] [2021-07-13 20:04:42,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:42,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:04:42,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:42,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:42,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:42,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:04:42,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:42,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:42,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:42,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 20:04:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:42,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146092732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:42,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:42,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:04:42,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118317046] [2021-07-13 20:04:42,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:04:42,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:42,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:04:42,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:04:42,379 INFO L87 Difference]: Start difference. First operand 10254 states and 46458 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:43,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:43,420 INFO L93 Difference]: Finished difference Result 11409 states and 50861 transitions. [2021-07-13 20:04:43,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:04:43,420 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:43,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:43,457 INFO L225 Difference]: With dead ends: 11409 [2021-07-13 20:04:43,457 INFO L226 Difference]: Without dead ends: 11385 [2021-07-13 20:04:43,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 797.0ms TimeCoverageRelationStatistics Valid=343, Invalid=1727, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:04:43,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11385 states. [2021-07-13 20:04:43,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11385 to 10257. [2021-07-13 20:04:43,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10257 states, 10256 states have (on average 4.530811232449298) internal successors, (46468), 10256 states have internal predecessors, (46468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:43,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10257 states to 10257 states and 46468 transitions. [2021-07-13 20:04:43,691 INFO L78 Accepts]: Start accepts. Automaton has 10257 states and 46468 transitions. Word has length 33 [2021-07-13 20:04:43,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:43,691 INFO L482 AbstractCegarLoop]: Abstraction has 10257 states and 46468 transitions. [2021-07-13 20:04:43,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:43,691 INFO L276 IsEmpty]: Start isEmpty. Operand 10257 states and 46468 transitions. [2021-07-13 20:04:43,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:43,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:43,711 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:43,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-07-13 20:04:43,912 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:43,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:43,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1557662538, now seen corresponding path program 53 times [2021-07-13 20:04:43,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:43,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114396512] [2021-07-13 20:04:43,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:44,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:44,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114396512] [2021-07-13 20:04:44,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114396512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:44,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586894339] [2021-07-13 20:04:44,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:44,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:04:44,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:44,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:44,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:44,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:44,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:04:44,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:44,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:44,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:44,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 20:04:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:44,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586894339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:44,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:44,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:04:44,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637577983] [2021-07-13 20:04:44,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:04:44,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:44,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:04:44,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:04:44,294 INFO L87 Difference]: Start difference. First operand 10257 states and 46468 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:45,484 INFO L93 Difference]: Finished difference Result 11369 states and 50779 transitions. [2021-07-13 20:04:45,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:04:45,484 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:45,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:45,521 INFO L225 Difference]: With dead ends: 11369 [2021-07-13 20:04:45,522 INFO L226 Difference]: Without dead ends: 11329 [2021-07-13 20:04:45,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 793.8ms TimeCoverageRelationStatistics Valid=338, Invalid=1642, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:04:45,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11329 states. [2021-07-13 20:04:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11329 to 10238. [2021-07-13 20:04:45,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10238 states, 10237 states have (on average 4.531014945784898) internal successors, (46384), 10237 states have internal predecessors, (46384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10238 states to 10238 states and 46384 transitions. [2021-07-13 20:04:45,742 INFO L78 Accepts]: Start accepts. Automaton has 10238 states and 46384 transitions. Word has length 33 [2021-07-13 20:04:45,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:45,742 INFO L482 AbstractCegarLoop]: Abstraction has 10238 states and 46384 transitions. [2021-07-13 20:04:45,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:45,742 INFO L276 IsEmpty]: Start isEmpty. Operand 10238 states and 46384 transitions. [2021-07-13 20:04:45,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:45,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:45,764 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:45,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-07-13 20:04:45,975 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:45,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:45,976 INFO L82 PathProgramCache]: Analyzing trace with hash 940531260, now seen corresponding path program 54 times [2021-07-13 20:04:45,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:45,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90948887] [2021-07-13 20:04:45,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:46,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:46,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90948887] [2021-07-13 20:04:46,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90948887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:46,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260521111] [2021-07-13 20:04:46,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:46,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:04:46,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:46,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:46,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:46,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:46,324 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:04:46,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 20:04:46,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:46,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:46,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:46,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-07-13 20:04:46,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:46,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260521111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:46,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:46,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 20:04:46,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119033114] [2021-07-13 20:04:46,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:04:46,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:46,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:04:46,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:04:46,572 INFO L87 Difference]: Start difference. First operand 10238 states and 46384 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:47,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:47,992 INFO L93 Difference]: Finished difference Result 10690 states and 48156 transitions. [2021-07-13 20:04:47,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:04:47,993 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:47,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:48,027 INFO L225 Difference]: With dead ends: 10690 [2021-07-13 20:04:48,027 INFO L226 Difference]: Without dead ends: 10660 [2021-07-13 20:04:48,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1143.1ms TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:04:48,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10660 states. [2021-07-13 20:04:48,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10660 to 10193. [2021-07-13 20:04:48,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10193 states, 10192 states have (on average 4.5310047095761385) internal successors, (46180), 10192 states have internal predecessors, (46180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:48,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10193 states to 10193 states and 46180 transitions. [2021-07-13 20:04:48,254 INFO L78 Accepts]: Start accepts. Automaton has 10193 states and 46180 transitions. Word has length 33 [2021-07-13 20:04:48,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:48,254 INFO L482 AbstractCegarLoop]: Abstraction has 10193 states and 46180 transitions. [2021-07-13 20:04:48,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:48,254 INFO L276 IsEmpty]: Start isEmpty. Operand 10193 states and 46180 transitions. [2021-07-13 20:04:48,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:48,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:48,275 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:48,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-07-13 20:04:48,475 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:48,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:48,476 INFO L82 PathProgramCache]: Analyzing trace with hash -108241142, now seen corresponding path program 55 times [2021-07-13 20:04:48,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:48,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798487521] [2021-07-13 20:04:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:48,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:48,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798487521] [2021-07-13 20:04:48,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798487521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:48,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380745915] [2021-07-13 20:04:48,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:48,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:48,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:48,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:04:48,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:48,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:48,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:48,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 20:04:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:48,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380745915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:48,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:48,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:04:48,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452443686] [2021-07-13 20:04:48,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:04:48,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:48,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:04:48,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:04:48,873 INFO L87 Difference]: Start difference. First operand 10193 states and 46180 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:50,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:50,408 INFO L93 Difference]: Finished difference Result 11816 states and 52505 transitions. [2021-07-13 20:04:50,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:04:50,409 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:50,452 INFO L225 Difference]: With dead ends: 11816 [2021-07-13 20:04:50,452 INFO L226 Difference]: Without dead ends: 11778 [2021-07-13 20:04:50,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1224.4ms TimeCoverageRelationStatistics Valid=410, Invalid=2242, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:04:50,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11778 states. [2021-07-13 20:04:50,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11778 to 10333. [2021-07-13 20:04:50,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10333 states, 10332 states have (on average 4.532133178474642) internal successors, (46826), 10332 states have internal predecessors, (46826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:50,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10333 states to 10333 states and 46826 transitions. [2021-07-13 20:04:50,698 INFO L78 Accepts]: Start accepts. Automaton has 10333 states and 46826 transitions. Word has length 33 [2021-07-13 20:04:50,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:50,698 INFO L482 AbstractCegarLoop]: Abstraction has 10333 states and 46826 transitions. [2021-07-13 20:04:50,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:50,698 INFO L276 IsEmpty]: Start isEmpty. Operand 10333 states and 46826 transitions. [2021-07-13 20:04:50,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:50,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:50,718 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:50,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:50,919 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:50,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:50,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1195031464, now seen corresponding path program 56 times [2021-07-13 20:04:50,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:50,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373988385] [2021-07-13 20:04:50,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:51,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:51,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373988385] [2021-07-13 20:04:51,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373988385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:51,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028857364] [2021-07-13 20:04:51,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:51,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:04:51,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:51,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:51,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:51,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:51,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-13 20:04:51,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:51,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:51,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:51,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-13 20:04:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:51,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028857364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:51,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:51,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:04:51,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127055611] [2021-07-13 20:04:51,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:04:51,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:51,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:04:51,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:04:51,421 INFO L87 Difference]: Start difference. First operand 10333 states and 46826 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:52,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:52,752 INFO L93 Difference]: Finished difference Result 11048 states and 49463 transitions. [2021-07-13 20:04:52,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:04:52,752 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:52,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:52,788 INFO L225 Difference]: With dead ends: 11048 [2021-07-13 20:04:52,788 INFO L226 Difference]: Without dead ends: 11035 [2021-07-13 20:04:52,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1087.0ms TimeCoverageRelationStatistics Valid=366, Invalid=1614, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:04:52,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11035 states. [2021-07-13 20:04:52,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11035 to 10284. [2021-07-13 20:04:52,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10284 states, 10283 states have (on average 4.531751434406302) internal successors, (46600), 10283 states have internal predecessors, (46600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:53,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10284 states to 10284 states and 46600 transitions. [2021-07-13 20:04:53,024 INFO L78 Accepts]: Start accepts. Automaton has 10284 states and 46600 transitions. Word has length 33 [2021-07-13 20:04:53,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:53,024 INFO L482 AbstractCegarLoop]: Abstraction has 10284 states and 46600 transitions. [2021-07-13 20:04:53,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:53,024 INFO L276 IsEmpty]: Start isEmpty. Operand 10284 states and 46600 transitions. [2021-07-13 20:04:53,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:53,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:53,045 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:53,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:53,245 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:53,247 INFO L82 PathProgramCache]: Analyzing trace with hash 295669392, now seen corresponding path program 57 times [2021-07-13 20:04:53,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:53,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677545223] [2021-07-13 20:04:53,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:53,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:53,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677545223] [2021-07-13 20:04:53,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677545223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:53,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294683188] [2021-07-13 20:04:53,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:53,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:04:53,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:53,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:53,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:53,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:53,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:04:53,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:53,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:53,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:53,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 20:04:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:53,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294683188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:53,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:53,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:04:53,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927397005] [2021-07-13 20:04:53,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:04:53,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:53,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:04:53,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:04:53,739 INFO L87 Difference]: Start difference. First operand 10284 states and 46600 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:55,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:55,234 INFO L93 Difference]: Finished difference Result 11050 states and 49596 transitions. [2021-07-13 20:04:55,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:04:55,234 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:55,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:55,280 INFO L225 Difference]: With dead ends: 11050 [2021-07-13 20:04:55,280 INFO L226 Difference]: Without dead ends: 11035 [2021-07-13 20:04:55,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1259.9ms TimeCoverageRelationStatistics Valid=349, Invalid=1813, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:04:55,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11035 states. [2021-07-13 20:04:55,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11035 to 10333. [2021-07-13 20:04:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10333 states, 10332 states have (on average 4.531842818428184) internal successors, (46823), 10332 states have internal predecessors, (46823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10333 states to 10333 states and 46823 transitions. [2021-07-13 20:04:55,491 INFO L78 Accepts]: Start accepts. Automaton has 10333 states and 46823 transitions. Word has length 33 [2021-07-13 20:04:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:55,491 INFO L482 AbstractCegarLoop]: Abstraction has 10333 states and 46823 transitions. [2021-07-13 20:04:55,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:55,491 INFO L276 IsEmpty]: Start isEmpty. Operand 10333 states and 46823 transitions. [2021-07-13 20:04:55,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:55,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:55,512 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:55,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-07-13 20:04:55,712 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:55,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:55,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1484928910, now seen corresponding path program 58 times [2021-07-13 20:04:55,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:55,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843484974] [2021-07-13 20:04:55,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:55,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:55,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843484974] [2021-07-13 20:04:55,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843484974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:55,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413979958] [2021-07-13 20:04:55,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:55,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:04:55,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:55,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:55,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:56,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:56,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:04:56,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:56,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:56,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:56,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 20:04:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:56,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413979958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:56,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:56,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:04:56,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306747447] [2021-07-13 20:04:56,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:04:56,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:56,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:04:56,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:04:56,122 INFO L87 Difference]: Start difference. First operand 10333 states and 46823 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:57,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:57,436 INFO L93 Difference]: Finished difference Result 11467 states and 51112 transitions. [2021-07-13 20:04:57,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:04:57,436 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:57,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:57,471 INFO L225 Difference]: With dead ends: 11467 [2021-07-13 20:04:57,471 INFO L226 Difference]: Without dead ends: 11433 [2021-07-13 20:04:57,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 998.2ms TimeCoverageRelationStatistics Valid=375, Invalid=1977, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:04:57,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11433 states. [2021-07-13 20:04:57,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11433 to 10287. [2021-07-13 20:04:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10287 states, 10286 states have (on average 4.531693564067665) internal successors, (46613), 10286 states have internal predecessors, (46613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:57,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10287 states to 10287 states and 46613 transitions. [2021-07-13 20:04:57,702 INFO L78 Accepts]: Start accepts. Automaton has 10287 states and 46613 transitions. Word has length 33 [2021-07-13 20:04:57,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:57,702 INFO L482 AbstractCegarLoop]: Abstraction has 10287 states and 46613 transitions. [2021-07-13 20:04:57,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:57,702 INFO L276 IsEmpty]: Start isEmpty. Operand 10287 states and 46613 transitions. [2021-07-13 20:04:57,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:04:57,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:57,723 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:57,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-07-13 20:04:57,924 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:57,924 INFO L82 PathProgramCache]: Analyzing trace with hash 410991178, now seen corresponding path program 59 times [2021-07-13 20:04:57,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:57,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680888642] [2021-07-13 20:04:57,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:58,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:58,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680888642] [2021-07-13 20:04:58,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680888642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:58,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253094105] [2021-07-13 20:04:58,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:58,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:04:58,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:58,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:04:58,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:58,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:58,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:04:58,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:58,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:58,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:58,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 20:04:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:58,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253094105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:58,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:58,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:04:58,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053761086] [2021-07-13 20:04:58,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:04:58,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:58,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:04:58,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:04:58,358 INFO L87 Difference]: Start difference. First operand 10287 states and 46613 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:59,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:59,778 INFO L93 Difference]: Finished difference Result 11050 states and 49648 transitions. [2021-07-13 20:04:59,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:04:59,778 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:04:59,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:59,811 INFO L225 Difference]: With dead ends: 11050 [2021-07-13 20:04:59,811 INFO L226 Difference]: Without dead ends: 11022 [2021-07-13 20:04:59,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1020.4ms TimeCoverageRelationStatistics Valid=219, Invalid=1673, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:04:59,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11022 states. [2021-07-13 20:04:59,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11022 to 10248. [2021-07-13 20:04:59,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10248 states, 10247 states have (on average 4.530691909827267) internal successors, (46426), 10247 states have internal predecessors, (46426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:00,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10248 states to 10248 states and 46426 transitions. [2021-07-13 20:05:00,016 INFO L78 Accepts]: Start accepts. Automaton has 10248 states and 46426 transitions. Word has length 33 [2021-07-13 20:05:00,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:00,016 INFO L482 AbstractCegarLoop]: Abstraction has 10248 states and 46426 transitions. [2021-07-13 20:05:00,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:00,016 INFO L276 IsEmpty]: Start isEmpty. Operand 10248 states and 46426 transitions. [2021-07-13 20:05:00,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:00,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:00,036 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:00,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable543,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:00,237 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:00,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:00,237 INFO L82 PathProgramCache]: Analyzing trace with hash -193174718, now seen corresponding path program 24 times [2021-07-13 20:05:00,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:00,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449765916] [2021-07-13 20:05:00,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:00,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:00,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449765916] [2021-07-13 20:05:00,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449765916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:00,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610942158] [2021-07-13 20:05:00,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:00,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:05:00,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:00,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:05:00,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:00,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:00,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 20:05:00,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:00,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:00,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:00,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-13 20:05:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:00,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610942158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:00,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:00,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:05:00,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706395663] [2021-07-13 20:05:00,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:05:00,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:00,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:05:00,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:05:00,813 INFO L87 Difference]: Start difference. First operand 10248 states and 46426 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:00,957 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-07-13 20:05:02,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:02,794 INFO L93 Difference]: Finished difference Result 11394 states and 51027 transitions. [2021-07-13 20:05:02,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:05:02,794 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:02,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:02,837 INFO L225 Difference]: With dead ends: 11394 [2021-07-13 20:05:02,837 INFO L226 Difference]: Without dead ends: 11375 [2021-07-13 20:05:02,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1782.1ms TimeCoverageRelationStatistics Valid=342, Invalid=1820, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:05:02,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11375 states. [2021-07-13 20:05:03,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11375 to 10406. [2021-07-13 20:05:03,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10406 states, 10405 states have (on average 4.531475252282556) internal successors, (47150), 10405 states have internal predecessors, (47150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:03,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10406 states to 10406 states and 47150 transitions. [2021-07-13 20:05:03,082 INFO L78 Accepts]: Start accepts. Automaton has 10406 states and 47150 transitions. Word has length 33 [2021-07-13 20:05:03,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:03,082 INFO L482 AbstractCegarLoop]: Abstraction has 10406 states and 47150 transitions. [2021-07-13 20:05:03,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand 10406 states and 47150 transitions. [2021-07-13 20:05:03,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:03,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:03,105 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:03,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-07-13 20:05:03,306 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:03,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:03,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1229180108, now seen corresponding path program 25 times [2021-07-13 20:05:03,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:03,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682324838] [2021-07-13 20:05:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:03,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:03,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682324838] [2021-07-13 20:05:03,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682324838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:03,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204207471] [2021-07-13 20:05:03,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:03,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:05:03,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:03,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:05:03,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:03,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:03,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:03,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-13 20:05:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:03,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204207471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:03,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:03,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:05:03,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297885061] [2021-07-13 20:05:03,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:03,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:03,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:03,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:03,792 INFO L87 Difference]: Start difference. First operand 10406 states and 47150 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:05,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:05,140 INFO L93 Difference]: Finished difference Result 11556 states and 51607 transitions. [2021-07-13 20:05:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:05:05,140 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:05,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:05,178 INFO L225 Difference]: With dead ends: 11556 [2021-07-13 20:05:05,178 INFO L226 Difference]: Without dead ends: 11541 [2021-07-13 20:05:05,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1122.4ms TimeCoverageRelationStatistics Valid=315, Invalid=1755, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:05:05,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11541 states. [2021-07-13 20:05:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11541 to 10366. [2021-07-13 20:05:05,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10366 states, 10365 states have (on average 4.530438977327544) internal successors, (46958), 10365 states have internal predecessors, (46958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:05,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 46958 transitions. [2021-07-13 20:05:05,438 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 46958 transitions. Word has length 33 [2021-07-13 20:05:05,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:05,438 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 46958 transitions. [2021-07-13 20:05:05,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:05,439 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 46958 transitions. [2021-07-13 20:05:05,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:05,463 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:05,463 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:05,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:05,664 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:05,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:05,664 INFO L82 PathProgramCache]: Analyzing trace with hash -439213334, now seen corresponding path program 26 times [2021-07-13 20:05:05,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:05,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296677127] [2021-07-13 20:05:05,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:05,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:05,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296677127] [2021-07-13 20:05:05,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296677127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:05,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224492690] [2021-07-13 20:05:05,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:05,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:05,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:05,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:05:05,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:06,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:06,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 20:05:06,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:06,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:06,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:06,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-13 20:05:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:06,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224492690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:06,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:06,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:05:06,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904850870] [2021-07-13 20:05:06,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:05:06,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:06,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:05:06,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:05:06,277 INFO L87 Difference]: Start difference. First operand 10366 states and 46958 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:08,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:08,086 INFO L93 Difference]: Finished difference Result 11170 states and 50068 transitions. [2021-07-13 20:05:08,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:05:08,086 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:08,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:08,125 INFO L225 Difference]: With dead ends: 11170 [2021-07-13 20:05:08,125 INFO L226 Difference]: Without dead ends: 11156 [2021-07-13 20:05:08,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1527.4ms TimeCoverageRelationStatistics Valid=372, Invalid=1698, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:05:08,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11156 states. [2021-07-13 20:05:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11156 to 10413. [2021-07-13 20:05:08,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10413 states, 10412 states have (on average 4.530541682673838) internal successors, (47172), 10412 states have internal predecessors, (47172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:08,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10413 states to 10413 states and 47172 transitions. [2021-07-13 20:05:08,394 INFO L78 Accepts]: Start accepts. Automaton has 10413 states and 47172 transitions. Word has length 33 [2021-07-13 20:05:08,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:08,394 INFO L482 AbstractCegarLoop]: Abstraction has 10413 states and 47172 transitions. [2021-07-13 20:05:08,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:08,394 INFO L276 IsEmpty]: Start isEmpty. Operand 10413 states and 47172 transitions. [2021-07-13 20:05:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:08,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:08,418 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:08,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-07-13 20:05:08,619 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:08,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:08,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1630053640, now seen corresponding path program 27 times [2021-07-13 20:05:08,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:08,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4794796] [2021-07-13 20:05:08,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:08,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:08,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4794796] [2021-07-13 20:05:08,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4794796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:08,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827635067] [2021-07-13 20:05:08,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:08,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:05:08,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:08,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:05:08,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:09,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:09,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-13 20:05:09,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:09,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:09,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:09,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-13 20:05:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:09,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827635067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:09,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:09,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:05:09,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797877535] [2021-07-13 20:05:09,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:05:09,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:09,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:05:09,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:05:09,249 INFO L87 Difference]: Start difference. First operand 10413 states and 47172 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:10,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:10,969 INFO L93 Difference]: Finished difference Result 11204 states and 50187 transitions. [2021-07-13 20:05:10,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:05:10,969 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:10,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:11,007 INFO L225 Difference]: With dead ends: 11204 [2021-07-13 20:05:11,007 INFO L226 Difference]: Without dead ends: 11181 [2021-07-13 20:05:11,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1508.4ms TimeCoverageRelationStatistics Valid=339, Invalid=1553, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:05:11,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11181 states. [2021-07-13 20:05:11,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11181 to 10358. [2021-07-13 20:05:11,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10358 states, 10357 states have (on average 4.531234913585015) internal successors, (46930), 10357 states have internal predecessors, (46930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10358 states to 10358 states and 46930 transitions. [2021-07-13 20:05:11,256 INFO L78 Accepts]: Start accepts. Automaton has 10358 states and 46930 transitions. Word has length 33 [2021-07-13 20:05:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:11,256 INFO L482 AbstractCegarLoop]: Abstraction has 10358 states and 46930 transitions. [2021-07-13 20:05:11,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:11,256 INFO L276 IsEmpty]: Start isEmpty. Operand 10358 states and 46930 transitions. [2021-07-13 20:05:11,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:11,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:11,278 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:11,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:11,479 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:11,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:11,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1268058332, now seen corresponding path program 28 times [2021-07-13 20:05:11,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:11,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971036164] [2021-07-13 20:05:11,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:11,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:11,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971036164] [2021-07-13 20:05:11,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971036164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:11,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234896127] [2021-07-13 20:05:11,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:11,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:11,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:11,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:05:11,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:11,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:05:11,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:11,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:11,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:11,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-13 20:05:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:11,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234896127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:11,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:11,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:05:11,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756336996] [2021-07-13 20:05:11,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:11,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:11,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:11,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:11,969 INFO L87 Difference]: Start difference. First operand 10358 states and 46930 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:13,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:13,794 INFO L93 Difference]: Finished difference Result 11215 states and 50477 transitions. [2021-07-13 20:05:13,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:05:13,795 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:13,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:13,835 INFO L225 Difference]: With dead ends: 11215 [2021-07-13 20:05:13,836 INFO L226 Difference]: Without dead ends: 11200 [2021-07-13 20:05:13,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1375.5ms TimeCoverageRelationStatistics Valid=310, Invalid=2140, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:05:13,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11200 states. [2021-07-13 20:05:14,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11200 to 10358. [2021-07-13 20:05:14,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10358 states, 10357 states have (on average 4.531234913585015) internal successors, (46930), 10357 states have internal predecessors, (46930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:14,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10358 states to 10358 states and 46930 transitions. [2021-07-13 20:05:14,086 INFO L78 Accepts]: Start accepts. Automaton has 10358 states and 46930 transitions. Word has length 33 [2021-07-13 20:05:14,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:14,086 INFO L482 AbstractCegarLoop]: Abstraction has 10358 states and 46930 transitions. [2021-07-13 20:05:14,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:14,086 INFO L276 IsEmpty]: Start isEmpty. Operand 10358 states and 46930 transitions. [2021-07-13 20:05:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:14,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:14,108 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:14,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-07-13 20:05:14,309 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:14,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:14,309 INFO L82 PathProgramCache]: Analyzing trace with hash -942316166, now seen corresponding path program 29 times [2021-07-13 20:05:14,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:14,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113560478] [2021-07-13 20:05:14,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:14,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:14,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113560478] [2021-07-13 20:05:14,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113560478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:14,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819678498] [2021-07-13 20:05:14,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:14,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:05:14,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:14,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:05:14,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:14,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:05:14,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:14,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:14,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:14,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-13 20:05:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:14,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819678498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:14,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:14,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:05:14,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308342174] [2021-07-13 20:05:14,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:05:14,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:14,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:05:14,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:14,780 INFO L87 Difference]: Start difference. First operand 10358 states and 46930 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:16,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:16,228 INFO L93 Difference]: Finished difference Result 11449 states and 51205 transitions. [2021-07-13 20:05:16,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:05:16,228 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:16,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:16,268 INFO L225 Difference]: With dead ends: 11449 [2021-07-13 20:05:16,268 INFO L226 Difference]: Without dead ends: 11435 [2021-07-13 20:05:16,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1144.2ms TimeCoverageRelationStatistics Valid=301, Invalid=1861, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:05:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11435 states. [2021-07-13 20:05:16,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11435 to 10334. [2021-07-13 20:05:16,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10334 states, 10333 states have (on average 4.531404238846414) internal successors, (46823), 10333 states have internal predecessors, (46823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:16,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10334 states to 10334 states and 46823 transitions. [2021-07-13 20:05:16,527 INFO L78 Accepts]: Start accepts. Automaton has 10334 states and 46823 transitions. Word has length 33 [2021-07-13 20:05:16,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:16,528 INFO L482 AbstractCegarLoop]: Abstraction has 10334 states and 46823 transitions. [2021-07-13 20:05:16,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:16,528 INFO L276 IsEmpty]: Start isEmpty. Operand 10334 states and 46823 transitions. [2021-07-13 20:05:16,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:16,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:16,552 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:16,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-07-13 20:05:16,753 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:16,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:16,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1631225734, now seen corresponding path program 30 times [2021-07-13 20:05:16,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:16,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210859961] [2021-07-13 20:05:16,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:16,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:16,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210859961] [2021-07-13 20:05:16,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210859961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:16,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587511292] [2021-07-13 20:05:16,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:17,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:05:17,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:17,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:05:17,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:17,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:05:17,290 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:05:17,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 20:05:17,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:05:17,313 INFO L628 ElimStorePlain]: treesize reduction 46, result has 30.3 percent of original size [2021-07-13 20:05:17,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:17,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:20 [2021-07-13 20:05:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:17,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587511292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:17,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:17,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 20:05:17,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401252294] [2021-07-13 20:05:17,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:05:17,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:17,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:05:17,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:05:17,414 INFO L87 Difference]: Start difference. First operand 10334 states and 46823 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:19,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:19,013 INFO L93 Difference]: Finished difference Result 10892 states and 49009 transitions. [2021-07-13 20:05:19,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:05:19,014 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:19,051 INFO L225 Difference]: With dead ends: 10892 [2021-07-13 20:05:19,051 INFO L226 Difference]: Without dead ends: 10877 [2021-07-13 20:05:19,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1132.0ms TimeCoverageRelationStatistics Valid=176, Invalid=1894, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:05:19,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10877 states. [2021-07-13 20:05:19,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10877 to 10313. [2021-07-13 20:05:19,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 4.530256012412723) internal successors, (46716), 10312 states have internal predecessors, (46716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:19,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 46716 transitions. [2021-07-13 20:05:19,289 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 46716 transitions. Word has length 33 [2021-07-13 20:05:19,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:19,289 INFO L482 AbstractCegarLoop]: Abstraction has 10313 states and 46716 transitions. [2021-07-13 20:05:19,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:19,289 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 46716 transitions. [2021-07-13 20:05:19,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:19,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:19,310 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:19,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-07-13 20:05:19,511 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:19,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:19,511 INFO L82 PathProgramCache]: Analyzing trace with hash 978067898, now seen corresponding path program 31 times [2021-07-13 20:05:19,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:19,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689972251] [2021-07-13 20:05:19,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:19,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:19,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689972251] [2021-07-13 20:05:19,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689972251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:19,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825284927] [2021-07-13 20:05:19,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:19,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:05:19,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:19,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:05:19,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 20:05:19,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:19,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:19,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:19,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-07-13 20:05:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:20,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825284927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:20,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:20,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:05:20,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732662736] [2021-07-13 20:05:20,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:20,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:20,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:20,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:20,026 INFO L87 Difference]: Start difference. First operand 10313 states and 46716 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:21,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:21,478 INFO L93 Difference]: Finished difference Result 10854 states and 48968 transitions. [2021-07-13 20:05:21,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:05:21,479 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:21,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:21,518 INFO L225 Difference]: With dead ends: 10854 [2021-07-13 20:05:21,518 INFO L226 Difference]: Without dead ends: 10839 [2021-07-13 20:05:21,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1077.5ms TimeCoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:05:21,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10839 states. [2021-07-13 20:05:21,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10839 to 10313. [2021-07-13 20:05:21,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 4.530256012412723) internal successors, (46716), 10312 states have internal predecessors, (46716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:21,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 46716 transitions. [2021-07-13 20:05:21,782 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 46716 transitions. Word has length 33 [2021-07-13 20:05:21,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:21,782 INFO L482 AbstractCegarLoop]: Abstraction has 10313 states and 46716 transitions. [2021-07-13 20:05:21,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:21,782 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 46716 transitions. [2021-07-13 20:05:21,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:21,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:21,808 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:22,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:22,008 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:22,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:22,008 INFO L82 PathProgramCache]: Analyzing trace with hash 913434392, now seen corresponding path program 32 times [2021-07-13 20:05:22,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:22,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213338021] [2021-07-13 20:05:22,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:22,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:22,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213338021] [2021-07-13 20:05:22,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213338021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:22,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023729366] [2021-07-13 20:05:22,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:22,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:22,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:22,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:05:22,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:22,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:05:22,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:22,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 30 [2021-07-13 20:05:22,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:22,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:22,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:22,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:51 [2021-07-13 20:05:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:22,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023729366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:22,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:22,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:05:22,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481334693] [2021-07-13 20:05:22,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:05:22,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:22,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:05:22,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:05:22,689 INFO L87 Difference]: Start difference. First operand 10313 states and 46716 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:23,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:23,784 INFO L93 Difference]: Finished difference Result 10625 states and 47876 transitions. [2021-07-13 20:05:23,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:05:23,784 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:23,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:23,821 INFO L225 Difference]: With dead ends: 10625 [2021-07-13 20:05:23,821 INFO L226 Difference]: Without dead ends: 10610 [2021-07-13 20:05:23,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 819.1ms TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:05:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10610 states. [2021-07-13 20:05:24,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10610 to 10286. [2021-07-13 20:05:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10286 states, 10285 states have (on average 4.530384054448225) internal successors, (46595), 10285 states have internal predecessors, (46595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:24,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10286 states to 10286 states and 46595 transitions. [2021-07-13 20:05:24,070 INFO L78 Accepts]: Start accepts. Automaton has 10286 states and 46595 transitions. Word has length 33 [2021-07-13 20:05:24,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:24,070 INFO L482 AbstractCegarLoop]: Abstraction has 10286 states and 46595 transitions. [2021-07-13 20:05:24,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:24,070 INFO L276 IsEmpty]: Start isEmpty. Operand 10286 states and 46595 transitions. [2021-07-13 20:05:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:24,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:24,092 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:24,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-07-13 20:05:24,293 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:24,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:24,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1290172674, now seen corresponding path program 33 times [2021-07-13 20:05:24,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:24,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139049934] [2021-07-13 20:05:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:24,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:24,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139049934] [2021-07-13 20:05:24,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139049934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:24,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046231655] [2021-07-13 20:05:24,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:24,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:05:24,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:24,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:05:24,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:24,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:05:24,754 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:05:24,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-07-13 20:05:24,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:05:24,796 INFO L628 ElimStorePlain]: treesize reduction 74, result has 22.9 percent of original size [2021-07-13 20:05:24,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:24,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-13 20:05:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:24,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046231655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:24,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:24,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:05:24,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012947777] [2021-07-13 20:05:24,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:05:24,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:24,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:05:24,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:05:24,937 INFO L87 Difference]: Start difference. First operand 10286 states and 46595 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:26,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:26,944 INFO L93 Difference]: Finished difference Result 11512 states and 51639 transitions. [2021-07-13 20:05:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:05:26,945 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:26,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:26,983 INFO L225 Difference]: With dead ends: 11512 [2021-07-13 20:05:26,983 INFO L226 Difference]: Without dead ends: 11493 [2021-07-13 20:05:26,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1631.6ms TimeCoverageRelationStatistics Valid=326, Invalid=2754, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:05:26,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11493 states. [2021-07-13 20:05:27,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11493 to 10414. [2021-07-13 20:05:27,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10414 states, 10413 states have (on average 4.531451070776914) internal successors, (47186), 10413 states have internal predecessors, (47186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:27,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10414 states to 10414 states and 47186 transitions. [2021-07-13 20:05:27,257 INFO L78 Accepts]: Start accepts. Automaton has 10414 states and 47186 transitions. Word has length 33 [2021-07-13 20:05:27,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:27,257 INFO L482 AbstractCegarLoop]: Abstraction has 10414 states and 47186 transitions. [2021-07-13 20:05:27,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:27,257 INFO L276 IsEmpty]: Start isEmpty. Operand 10414 states and 47186 transitions. [2021-07-13 20:05:27,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:27,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:27,282 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:27,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:27,482 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:27,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:27,483 INFO L82 PathProgramCache]: Analyzing trace with hash 132182152, now seen corresponding path program 34 times [2021-07-13 20:05:27,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:27,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878658608] [2021-07-13 20:05:27,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:27,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:27,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878658608] [2021-07-13 20:05:27,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878658608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:27,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142468135] [2021-07-13 20:05:27,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:27,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:27,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:27,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:05:27,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:27,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:05:27,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 20:05:27,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:27,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:27,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:27,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-13 20:05:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:27,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142468135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:27,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:27,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:05:27,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149984661] [2021-07-13 20:05:27,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:27,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:27,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:27,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:27,976 INFO L87 Difference]: Start difference. First operand 10414 states and 47186 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:29,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:29,365 INFO L93 Difference]: Finished difference Result 12475 states and 55280 transitions. [2021-07-13 20:05:29,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:05:29,366 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:29,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:29,408 INFO L225 Difference]: With dead ends: 12475 [2021-07-13 20:05:29,409 INFO L226 Difference]: Without dead ends: 12451 [2021-07-13 20:05:29,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1089.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1839, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:05:29,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12451 states. [2021-07-13 20:05:29,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12451 to 10495. [2021-07-13 20:05:29,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10495 states, 10494 states have (on average 4.536115875738517) internal successors, (47602), 10494 states have internal predecessors, (47602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:29,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10495 states to 10495 states and 47602 transitions. [2021-07-13 20:05:29,702 INFO L78 Accepts]: Start accepts. Automaton has 10495 states and 47602 transitions. Word has length 33 [2021-07-13 20:05:29,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:29,702 INFO L482 AbstractCegarLoop]: Abstraction has 10495 states and 47602 transitions. [2021-07-13 20:05:29,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:29,702 INFO L276 IsEmpty]: Start isEmpty. Operand 10495 states and 47602 transitions. [2021-07-13 20:05:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:29,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:29,724 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:29,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-07-13 20:05:29,925 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:29,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:29,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1536211290, now seen corresponding path program 35 times [2021-07-13 20:05:29,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:29,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780238992] [2021-07-13 20:05:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:30,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:30,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780238992] [2021-07-13 20:05:30,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780238992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:30,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724832309] [2021-07-13 20:05:30,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:30,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:05:30,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:30,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:05:30,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:30,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:05:30,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:30,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:30,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:30,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-13 20:05:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:30,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724832309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:30,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:30,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:05:30,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248519571] [2021-07-13 20:05:30,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:05:30,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:30,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:05:30,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:30,424 INFO L87 Difference]: Start difference. First operand 10495 states and 47602 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:31,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:31,868 INFO L93 Difference]: Finished difference Result 12447 states and 55213 transitions. [2021-07-13 20:05:31,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:05:31,868 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:31,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:31,909 INFO L225 Difference]: With dead ends: 12447 [2021-07-13 20:05:31,909 INFO L226 Difference]: Without dead ends: 12410 [2021-07-13 20:05:31,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1169.7ms TimeCoverageRelationStatistics Valid=329, Invalid=1833, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:05:31,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12410 states. [2021-07-13 20:05:32,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12410 to 10535. [2021-07-13 20:05:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10535 states, 10534 states have (on average 4.536928042528954) internal successors, (47792), 10534 states have internal predecessors, (47792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:32,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10535 states to 10535 states and 47792 transitions. [2021-07-13 20:05:32,197 INFO L78 Accepts]: Start accepts. Automaton has 10535 states and 47792 transitions. Word has length 33 [2021-07-13 20:05:32,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:32,197 INFO L482 AbstractCegarLoop]: Abstraction has 10535 states and 47792 transitions. [2021-07-13 20:05:32,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:32,198 INFO L276 IsEmpty]: Start isEmpty. Operand 10535 states and 47792 transitions. [2021-07-13 20:05:32,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:32,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:32,224 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:32,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable566 [2021-07-13 20:05:32,424 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:32,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:32,425 INFO L82 PathProgramCache]: Analyzing trace with hash 171060376, now seen corresponding path program 36 times [2021-07-13 20:05:32,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:32,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869776719] [2021-07-13 20:05:32,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:32,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:32,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869776719] [2021-07-13 20:05:32,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869776719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:32,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723511569] [2021-07-13 20:05:32,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:32,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:05:32,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:32,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:05:32,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:32,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:05:32,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:32,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 65 [2021-07-13 20:05:32,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:33,019 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-07-13 20:05:33,019 INFO L628 ElimStorePlain]: treesize reduction 38, result has 65.1 percent of original size [2021-07-13 20:05:33,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:33,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:71 [2021-07-13 20:05:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:33,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723511569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:33,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:33,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 20:05:33,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043911793] [2021-07-13 20:05:33,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:05:33,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:33,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:05:33,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:05:33,267 INFO L87 Difference]: Start difference. First operand 10535 states and 47792 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:33,751 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-07-13 20:05:35,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:35,586 INFO L93 Difference]: Finished difference Result 11256 states and 50731 transitions. [2021-07-13 20:05:35,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:05:35,587 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:35,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:35,623 INFO L225 Difference]: With dead ends: 11256 [2021-07-13 20:05:35,623 INFO L226 Difference]: Without dead ends: 11241 [2021-07-13 20:05:35,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1882.4ms TimeCoverageRelationStatistics Valid=260, Invalid=2496, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:05:35,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11241 states. [2021-07-13 20:05:35,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11241 to 10517. [2021-07-13 20:05:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10517 states, 10516 states have (on average 4.5375618105743625) internal successors, (47717), 10516 states have internal predecessors, (47717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:35,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10517 states to 10517 states and 47717 transitions. [2021-07-13 20:05:35,858 INFO L78 Accepts]: Start accepts. Automaton has 10517 states and 47717 transitions. Word has length 33 [2021-07-13 20:05:35,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:35,858 INFO L482 AbstractCegarLoop]: Abstraction has 10517 states and 47717 transitions. [2021-07-13 20:05:35,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:35,858 INFO L276 IsEmpty]: Start isEmpty. Operand 10517 states and 47717 transitions. [2021-07-13 20:05:35,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:35,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:35,880 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:36,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:36,081 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:36,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:36,081 INFO L82 PathProgramCache]: Analyzing trace with hash 534227778, now seen corresponding path program 37 times [2021-07-13 20:05:36,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:36,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219295318] [2021-07-13 20:05:36,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:36,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:36,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219295318] [2021-07-13 20:05:36,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219295318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:36,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305144996] [2021-07-13 20:05:36,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:36,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:05:36,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:36,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:05:36,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-13 20:05:36,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:36,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:36,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:36,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-07-13 20:05:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:36,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305144996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:36,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:36,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:05:36,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755399004] [2021-07-13 20:05:36,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:36,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:36,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:36,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:36,663 INFO L87 Difference]: Start difference. First operand 10517 states and 47717 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:38,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:38,245 INFO L93 Difference]: Finished difference Result 11320 states and 51041 transitions. [2021-07-13 20:05:38,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:05:38,246 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:38,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:38,288 INFO L225 Difference]: With dead ends: 11320 [2021-07-13 20:05:38,288 INFO L226 Difference]: Without dead ends: 11305 [2021-07-13 20:05:38,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1271.8ms TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:05:38,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11305 states. [2021-07-13 20:05:38,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11305 to 10517. [2021-07-13 20:05:38,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10517 states, 10516 states have (on average 4.5375618105743625) internal successors, (47717), 10516 states have internal predecessors, (47717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:38,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10517 states to 10517 states and 47717 transitions. [2021-07-13 20:05:38,569 INFO L78 Accepts]: Start accepts. Automaton has 10517 states and 47717 transitions. Word has length 33 [2021-07-13 20:05:38,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:38,569 INFO L482 AbstractCegarLoop]: Abstraction has 10517 states and 47717 transitions. [2021-07-13 20:05:38,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:38,570 INFO L276 IsEmpty]: Start isEmpty. Operand 10517 states and 47717 transitions. [2021-07-13 20:05:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:38,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:38,594 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:38,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-07-13 20:05:38,795 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:38,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:38,795 INFO L82 PathProgramCache]: Analyzing trace with hash 968257124, now seen corresponding path program 38 times [2021-07-13 20:05:38,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:38,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411887660] [2021-07-13 20:05:38,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:39,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:39,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411887660] [2021-07-13 20:05:39,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411887660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:39,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608248411] [2021-07-13 20:05:39,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:39,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:39,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:39,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:05:39,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:39,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:05:39,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:39,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-07-13 20:05:39,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:39,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:39,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:39,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:42 [2021-07-13 20:05:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:39,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608248411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:39,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:39,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:05:39,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488157916] [2021-07-13 20:05:39,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:05:39,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:39,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:05:39,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:05:39,532 INFO L87 Difference]: Start difference. First operand 10517 states and 47717 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:40,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:40,815 INFO L93 Difference]: Finished difference Result 11108 states and 50071 transitions. [2021-07-13 20:05:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:05:40,816 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:40,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:40,852 INFO L225 Difference]: With dead ends: 11108 [2021-07-13 20:05:40,852 INFO L226 Difference]: Without dead ends: 11093 [2021-07-13 20:05:40,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1004.1ms TimeCoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:05:40,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11093 states. [2021-07-13 20:05:41,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11093 to 10493. [2021-07-13 20:05:41,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10493 states, 10492 states have (on average 4.537933663743805) internal successors, (47612), 10492 states have internal predecessors, (47612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10493 states to 10493 states and 47612 transitions. [2021-07-13 20:05:41,096 INFO L78 Accepts]: Start accepts. Automaton has 10493 states and 47612 transitions. Word has length 33 [2021-07-13 20:05:41,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:41,096 INFO L482 AbstractCegarLoop]: Abstraction has 10493 states and 47612 transitions. [2021-07-13 20:05:41,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:41,096 INFO L276 IsEmpty]: Start isEmpty. Operand 10493 states and 47612 transitions. [2021-07-13 20:05:41,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:41,120 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:41,120 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:41,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-07-13 20:05:41,320 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:41,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:41,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1134233474, now seen corresponding path program 39 times [2021-07-13 20:05:41,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:41,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29556647] [2021-07-13 20:05:41,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:41,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:41,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29556647] [2021-07-13 20:05:41,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29556647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:41,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624730077] [2021-07-13 20:05:41,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:41,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:05:41,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:41,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:05:41,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:41,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:41,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:05:41,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:41,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:41,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:41,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-13 20:05:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:41,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624730077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:41,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:41,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:05:41,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326971304] [2021-07-13 20:05:41,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:05:41,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:41,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:05:41,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:05:41,973 INFO L87 Difference]: Start difference. First operand 10493 states and 47612 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:43,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:43,356 INFO L93 Difference]: Finished difference Result 11283 states and 50803 transitions. [2021-07-13 20:05:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:05:43,356 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:43,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:43,392 INFO L225 Difference]: With dead ends: 11283 [2021-07-13 20:05:43,392 INFO L226 Difference]: Without dead ends: 11264 [2021-07-13 20:05:43,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1293.4ms TimeCoverageRelationStatistics Valid=260, Invalid=1546, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:05:43,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11264 states. [2021-07-13 20:05:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11264 to 10594. [2021-07-13 20:05:43,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10594 states, 10593 states have (on average 4.537430378551874) internal successors, (48065), 10593 states have internal predecessors, (48065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:43,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10594 states to 10594 states and 48065 transitions. [2021-07-13 20:05:43,633 INFO L78 Accepts]: Start accepts. Automaton has 10594 states and 48065 transitions. Word has length 33 [2021-07-13 20:05:43,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:43,633 INFO L482 AbstractCegarLoop]: Abstraction has 10594 states and 48065 transitions. [2021-07-13 20:05:43,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:43,633 INFO L276 IsEmpty]: Start isEmpty. Operand 10594 states and 48065 transitions. [2021-07-13 20:05:43,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:43,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:43,660 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:43,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-07-13 20:05:43,861 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:43,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:43,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1738378996, now seen corresponding path program 40 times [2021-07-13 20:05:43,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:43,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705105960] [2021-07-13 20:05:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:44,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:44,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705105960] [2021-07-13 20:05:44,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705105960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:44,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394941909] [2021-07-13 20:05:44,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:44,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:44,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:44,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:05:44,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:44,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:05:44,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:44,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:44,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:44,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 20:05:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:44,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394941909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:44,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:44,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:05:44,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414115644] [2021-07-13 20:05:44,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:44,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:44,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:44,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:44,420 INFO L87 Difference]: Start difference. First operand 10594 states and 48065 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:45,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:45,706 INFO L93 Difference]: Finished difference Result 11924 states and 53212 transitions. [2021-07-13 20:05:45,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:05:45,706 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:45,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:45,747 INFO L225 Difference]: With dead ends: 11924 [2021-07-13 20:05:45,747 INFO L226 Difference]: Without dead ends: 11900 [2021-07-13 20:05:45,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1119.9ms TimeCoverageRelationStatistics Valid=359, Invalid=1803, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:05:45,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11900 states. [2021-07-13 20:05:45,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11900 to 10615. [2021-07-13 20:05:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10615 states, 10614 states have (on average 4.53815715093273) internal successors, (48168), 10614 states have internal predecessors, (48168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:46,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10615 states to 10615 states and 48168 transitions. [2021-07-13 20:05:46,027 INFO L78 Accepts]: Start accepts. Automaton has 10615 states and 48168 transitions. Word has length 33 [2021-07-13 20:05:46,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:46,028 INFO L482 AbstractCegarLoop]: Abstraction has 10615 states and 48168 transitions. [2021-07-13 20:05:46,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:46,028 INFO L276 IsEmpty]: Start isEmpty. Operand 10615 states and 48168 transitions. [2021-07-13 20:05:46,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:46,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:46,135 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:46,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable579,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:46,336 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:46,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:46,336 INFO L82 PathProgramCache]: Analyzing trace with hash 888194858, now seen corresponding path program 41 times [2021-07-13 20:05:46,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:46,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949139911] [2021-07-13 20:05:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:46,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:46,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949139911] [2021-07-13 20:05:46,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949139911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:46,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261384660] [2021-07-13 20:05:46,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:46,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:05:46,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:46,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:05:46,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:46,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:05:46,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:46,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:46,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:46,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-13 20:05:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:46,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261384660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:46,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:46,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:05:46,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259926711] [2021-07-13 20:05:46,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:05:46,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:46,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:05:46,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:46,832 INFO L87 Difference]: Start difference. First operand 10615 states and 48168 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:48,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:48,180 INFO L93 Difference]: Finished difference Result 11896 states and 53145 transitions. [2021-07-13 20:05:48,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:05:48,181 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:48,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:48,223 INFO L225 Difference]: With dead ends: 11896 [2021-07-13 20:05:48,223 INFO L226 Difference]: Without dead ends: 11859 [2021-07-13 20:05:48,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1159.1ms TimeCoverageRelationStatistics Valid=365, Invalid=1797, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:05:48,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11859 states. [2021-07-13 20:05:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11859 to 10559. [2021-07-13 20:05:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10559 states, 10558 states have (on average 4.539496116688767) internal successors, (47928), 10558 states have internal predecessors, (47928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:48,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10559 states to 10559 states and 47928 transitions. [2021-07-13 20:05:48,643 INFO L78 Accepts]: Start accepts. Automaton has 10559 states and 47928 transitions. Word has length 33 [2021-07-13 20:05:48,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:48,643 INFO L482 AbstractCegarLoop]: Abstraction has 10559 states and 47928 transitions. [2021-07-13 20:05:48,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:48,644 INFO L276 IsEmpty]: Start isEmpty. Operand 10559 states and 47928 transitions. [2021-07-13 20:05:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:48,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:48,669 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:48,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:48,869 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:48,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:48,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1699500772, now seen corresponding path program 42 times [2021-07-13 20:05:48,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:48,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356333720] [2021-07-13 20:05:48,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:49,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:49,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356333720] [2021-07-13 20:05:49,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356333720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:49,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953224164] [2021-07-13 20:05:49,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:49,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:05:49,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:49,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:05:49,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:49,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:05:49,341 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:05:49,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-13 20:05:49,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:49,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:49,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:49,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-07-13 20:05:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:49,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953224164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:49,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:49,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 20:05:49,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187344474] [2021-07-13 20:05:49,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:05:49,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:49,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:05:49,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:05:49,607 INFO L87 Difference]: Start difference. First operand 10559 states and 47928 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:51,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:51,663 INFO L93 Difference]: Finished difference Result 11079 states and 50046 transitions. [2021-07-13 20:05:51,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:05:51,663 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:51,700 INFO L225 Difference]: With dead ends: 11079 [2021-07-13 20:05:51,700 INFO L226 Difference]: Without dead ends: 11064 [2021-07-13 20:05:51,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1704.8ms TimeCoverageRelationStatistics Valid=280, Invalid=2476, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:05:51,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11064 states. [2021-07-13 20:05:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11064 to 10538. [2021-07-13 20:05:51,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10538 states, 10537 states have (on average 4.540476416437316) internal successors, (47843), 10537 states have internal predecessors, (47843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:51,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10538 states to 10538 states and 47843 transitions. [2021-07-13 20:05:51,931 INFO L78 Accepts]: Start accepts. Automaton has 10538 states and 47843 transitions. Word has length 33 [2021-07-13 20:05:51,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:51,931 INFO L482 AbstractCegarLoop]: Abstraction has 10538 states and 47843 transitions. [2021-07-13 20:05:51,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:51,931 INFO L276 IsEmpty]: Start isEmpty. Operand 10538 states and 47843 transitions. [2021-07-13 20:05:51,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:51,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:51,956 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:52,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,371 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:52,156 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:52,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:52,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1231415870, now seen corresponding path program 43 times [2021-07-13 20:05:52,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:52,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314746158] [2021-07-13 20:05:52,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:52,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:52,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314746158] [2021-07-13 20:05:52,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314746158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:52,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876093937] [2021-07-13 20:05:52,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:52,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:05:52,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:52,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:05:52,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:05:52,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:52,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:52,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:52,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 20:05:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:52,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876093937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:52,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:52,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:05:52,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709476065] [2021-07-13 20:05:52,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:05:52,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:52,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:05:52,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:52,684 INFO L87 Difference]: Start difference. First operand 10538 states and 47843 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:54,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:54,732 INFO L93 Difference]: Finished difference Result 12532 states and 55693 transitions. [2021-07-13 20:05:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:05:54,732 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:54,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:54,776 INFO L225 Difference]: With dead ends: 12532 [2021-07-13 20:05:54,776 INFO L226 Difference]: Without dead ends: 12494 [2021-07-13 20:05:54,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1797.8ms TimeCoverageRelationStatistics Valid=472, Invalid=2834, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:05:54,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12494 states. [2021-07-13 20:05:55,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12494 to 10767. [2021-07-13 20:05:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10767 states, 10766 states have (on average 4.540033438603009) internal successors, (48878), 10766 states have internal predecessors, (48878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10767 states to 10767 states and 48878 transitions. [2021-07-13 20:05:55,070 INFO L78 Accepts]: Start accepts. Automaton has 10767 states and 48878 transitions. Word has length 33 [2021-07-13 20:05:55,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:55,070 INFO L482 AbstractCegarLoop]: Abstraction has 10767 states and 48878 transitions. [2021-07-13 20:05:55,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:55,070 INFO L276 IsEmpty]: Start isEmpty. Operand 10767 states and 48878 transitions. [2021-07-13 20:05:55,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:55,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:55,096 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:55,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-07-13 20:05:55,296 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:55,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:55,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1641196600, now seen corresponding path program 44 times [2021-07-13 20:05:55,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:55,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099538665] [2021-07-13 20:05:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:55,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:55,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099538665] [2021-07-13 20:05:55,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099538665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:55,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804017755] [2021-07-13 20:05:55,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:55,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:55,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:55,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:05:55,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:55,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:55,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:05:55,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:55,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:55,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:55,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-13 20:05:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:55,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804017755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:55,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:55,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:05:55,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604074835] [2021-07-13 20:05:55,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:05:55,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:55,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:05:55,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:05:55,925 INFO L87 Difference]: Start difference. First operand 10767 states and 48878 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:56,232 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-07-13 20:05:57,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:57,853 INFO L93 Difference]: Finished difference Result 12016 states and 53510 transitions. [2021-07-13 20:05:57,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:05:57,853 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:05:57,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:57,892 INFO L225 Difference]: With dead ends: 12016 [2021-07-13 20:05:57,892 INFO L226 Difference]: Without dead ends: 11994 [2021-07-13 20:05:57,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1794.0ms TimeCoverageRelationStatistics Valid=444, Invalid=2006, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:05:57,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11994 states. [2021-07-13 20:05:58,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11994 to 10804. [2021-07-13 20:05:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10804 states, 10803 states have (on average 4.539109506618532) internal successors, (49036), 10803 states have internal predecessors, (49036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:58,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10804 states to 10804 states and 49036 transitions. [2021-07-13 20:05:58,180 INFO L78 Accepts]: Start accepts. Automaton has 10804 states and 49036 transitions. Word has length 33 [2021-07-13 20:05:58,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:58,181 INFO L482 AbstractCegarLoop]: Abstraction has 10804 states and 49036 transitions. [2021-07-13 20:05:58,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:58,181 INFO L276 IsEmpty]: Start isEmpty. Operand 10804 states and 49036 transitions. [2021-07-13 20:05:58,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:05:58,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:58,206 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:58,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-07-13 20:05:58,406 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:58,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:58,407 INFO L82 PathProgramCache]: Analyzing trace with hash -2086298620, now seen corresponding path program 45 times [2021-07-13 20:05:58,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:58,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113552798] [2021-07-13 20:05:58,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:58,586 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-07-13 20:05:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:58,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:58,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113552798] [2021-07-13 20:05:58,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113552798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:58,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802193539] [2021-07-13 20:05:58,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:58,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:05:58,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:58,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:05:58,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:58,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:58,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-13 20:05:58,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:58,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:58,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:58,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-13 20:05:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:59,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802193539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:59,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:59,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:05:59,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962617549] [2021-07-13 20:05:59,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:05:59,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:59,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:05:59,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:05:59,206 INFO L87 Difference]: Start difference. First operand 10804 states and 49036 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:59,409 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-07-13 20:05:59,647 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-07-13 20:05:59,971 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-07-13 20:06:00,605 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-07-13 20:06:01,428 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-07-13 20:06:01,599 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-07-13 20:06:01,747 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-07-13 20:06:01,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:01,757 INFO L93 Difference]: Finished difference Result 11633 states and 52265 transitions. [2021-07-13 20:06:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:06:01,758 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:06:01,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:01,801 INFO L225 Difference]: With dead ends: 11633 [2021-07-13 20:06:01,801 INFO L226 Difference]: Without dead ends: 11618 [2021-07-13 20:06:01,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 2424.6ms TimeCoverageRelationStatistics Valid=329, Invalid=1833, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:06:01,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11618 states. [2021-07-13 20:06:02,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11618 to 10804. [2021-07-13 20:06:02,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10804 states, 10803 states have (on average 4.539109506618532) internal successors, (49036), 10803 states have internal predecessors, (49036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:02,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10804 states to 10804 states and 49036 transitions. [2021-07-13 20:06:02,062 INFO L78 Accepts]: Start accepts. Automaton has 10804 states and 49036 transitions. Word has length 33 [2021-07-13 20:06:02,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:02,062 INFO L482 AbstractCegarLoop]: Abstraction has 10804 states and 49036 transitions. [2021-07-13 20:06:02,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 10804 states and 49036 transitions. [2021-07-13 20:06:02,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:06:02,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:02,087 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:02,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2021-07-13 20:06:02,287 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:02,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:02,288 INFO L82 PathProgramCache]: Analyzing trace with hash 428070374, now seen corresponding path program 46 times [2021-07-13 20:06:02,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:02,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694894082] [2021-07-13 20:06:02,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:02,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:02,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694894082] [2021-07-13 20:06:02,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694894082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:02,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717842750] [2021-07-13 20:06:02,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:02,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:02,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:02,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:06:02,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:02,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:06:02,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:06:02,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:02,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:02,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:02,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 20:06:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:02,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717842750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:02,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:02,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:06:02,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196995862] [2021-07-13 20:06:02,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:06:02,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:02,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:06:02,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:06:02,795 INFO L87 Difference]: Start difference. First operand 10804 states and 49036 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:04,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:04,406 INFO L93 Difference]: Finished difference Result 12285 states and 54706 transitions. [2021-07-13 20:06:04,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:06:04,406 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:06:04,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:04,446 INFO L225 Difference]: With dead ends: 12285 [2021-07-13 20:06:04,446 INFO L226 Difference]: Without dead ends: 12251 [2021-07-13 20:06:04,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1336.2ms TimeCoverageRelationStatistics Valid=416, Invalid=2340, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:06:04,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12251 states. [2021-07-13 20:06:04,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12251 to 10748. [2021-07-13 20:06:04,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10748 states, 10747 states have (on average 4.541267330417791) internal successors, (48805), 10747 states have internal predecessors, (48805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10748 states to 10748 states and 48805 transitions. [2021-07-13 20:06:04,716 INFO L78 Accepts]: Start accepts. Automaton has 10748 states and 48805 transitions. Word has length 33 [2021-07-13 20:06:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:04,716 INFO L482 AbstractCegarLoop]: Abstraction has 10748 states and 48805 transitions. [2021-07-13 20:06:04,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 10748 states and 48805 transitions. [2021-07-13 20:06:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:06:04,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:04,741 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:04,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable590,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:04,942 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:04,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:04,942 INFO L82 PathProgramCache]: Analyzing trace with hash 53715198, now seen corresponding path program 47 times [2021-07-13 20:06:04,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:04,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086299637] [2021-07-13 20:06:04,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:05,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:05,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086299637] [2021-07-13 20:06:05,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086299637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:05,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124141350] [2021-07-13 20:06:05,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:05,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:06:05,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:05,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:06:05,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:05,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:06:05,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:06:05,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:05,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:05,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:05,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-13 20:06:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:05,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124141350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:05,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:05,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:06:05,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266596153] [2021-07-13 20:06:05,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:06:05,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:05,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:06:05,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:06:05,555 INFO L87 Difference]: Start difference. First operand 10748 states and 48805 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:06,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:06,905 INFO L93 Difference]: Finished difference Result 11563 states and 52036 transitions. [2021-07-13 20:06:06,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:06:06,906 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:06:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:06,948 INFO L225 Difference]: With dead ends: 11563 [2021-07-13 20:06:06,948 INFO L226 Difference]: Without dead ends: 11544 [2021-07-13 20:06:06,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1144.4ms TimeCoverageRelationStatistics Valid=240, Invalid=1652, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:06:06,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11544 states. [2021-07-13 20:06:07,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11544 to 10736. [2021-07-13 20:06:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10736 states, 10735 states have (on average 4.5424312994876574) internal successors, (48763), 10735 states have internal predecessors, (48763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:07,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10736 states to 10736 states and 48763 transitions. [2021-07-13 20:06:07,220 INFO L78 Accepts]: Start accepts. Automaton has 10736 states and 48763 transitions. Word has length 33 [2021-07-13 20:06:07,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:07,220 INFO L482 AbstractCegarLoop]: Abstraction has 10736 states and 48763 transitions. [2021-07-13 20:06:07,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:07,220 INFO L276 IsEmpty]: Start isEmpty. Operand 10736 states and 48763 transitions. [2021-07-13 20:06:07,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:06:07,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:07,247 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:07,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,376 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:07,447 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:07,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:07,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1774622960, now seen corresponding path program 48 times [2021-07-13 20:06:07,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:07,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921184980] [2021-07-13 20:06:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:07,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:07,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921184980] [2021-07-13 20:06:07,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921184980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:07,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631669006] [2021-07-13 20:06:07,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:07,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:06:07,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:07,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:06:07,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:07,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:06:07,906 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-13 20:06:07,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-07-13 20:06:07,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:06:07,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:07,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:07,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-13 20:06:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:08,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631669006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:08,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:08,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:06:08,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96791759] [2021-07-13 20:06:08,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:06:08,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:08,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:06:08,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:06:08,053 INFO L87 Difference]: Start difference. First operand 10736 states and 48763 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-13 20:06:09,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:06:09,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:09,591 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:06:09,591 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT (3/3) [2021-07-13 20:06:09,593 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:06:09,594 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:06:09,594 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:06:09 BasicIcfg [2021-07-13 20:06:09,594 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:06:09,595 INFO L168 Benchmark]: Toolchain (without parser) took 788428.16 ms. Allocated memory was 203.4 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 183.4 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 241.5 MB. Max. memory is 8.0 GB. [2021-07-13 20:06:09,595 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 203.4 MB. Free memory is still 184.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:06:09,595 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.19 ms. Allocated memory is still 203.4 MB. Free memory was 183.4 MB in the beginning and 181.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:06:09,596 INFO L168 Benchmark]: Boogie Preprocessor took 23.58 ms. Allocated memory is still 203.4 MB. Free memory was 181.9 MB in the beginning and 180.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:06:09,596 INFO L168 Benchmark]: RCFGBuilder took 276.81 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 164.1 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-07-13 20:06:09,596 INFO L168 Benchmark]: TraceAbstraction took 788102.80 ms. Allocated memory was 203.4 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 163.7 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 221.5 MB. Max. memory is 8.0 GB. [2021-07-13 20:06:09,596 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 203.4 MB. Free memory is still 184.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.19 ms. Allocated memory is still 203.4 MB. Free memory was 183.4 MB in the beginning and 181.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.58 ms. Allocated memory is still 203.4 MB. Free memory was 181.9 MB in the beginning and 180.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 276.81 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 164.1 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 788102.80 ms. Allocated memory was 203.4 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 163.7 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 221.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (10736states) and FLOYD_HOARE automaton (currently 34 states, 26 states before enhancement),while ReachableStatesComputation was computing reachable states (1420 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread4Thread1of1ForFork4 with 1 thread instances CFG has 13 procedures, 76 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 38.0ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 6.9ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=106occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread1Thread1of1ForFork1 with 1 thread instances CFG has 13 procedures, 76 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.8ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 1.6ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 13 procedures, 76 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 787899.9ms, OverallIterations: 379, TraceHistogramMax: 2, EmptinessCheckTime: 5986.5ms, AutomataDifference: 479676.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 47355 SDtfs, 162543 SDslu, 595112 SDs, 0 SdLazy, 381179 SolverSat, 27486 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 141253.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23649 GetRequests, 8015 SyntacticMatches, 812 SemanticMatches, 14822 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169830 ImplicationChecksByTransitivity, 378841.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10804occurred in iteration=375, InterpolantAutomatonStates: 12077, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 61362.9ms AutomataMinimizationTime, 378 MinimizatonAttempts, 325501 StatesRemovedByMinimization, 378 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2114.0ms SsaConstructionTime, 5221.9ms SatisfiabilityAnalysisTime, 148198.1ms InterpolantComputationTime, 23973 NumberOfCodeBlocks, 23973 NumberOfCodeBlocksAsserted, 1252 NumberOfCheckSat, 23218 ConstructedInterpolants, 11 QuantifiedInterpolants, 416302 SizeOfPredicates, 4748 NumberOfNonLiveVariables, 51782 ConjunctsInSsa, 13819 ConjunctsInUnsatCore, 755 InterpolantComputations, 5 PerfectInterpolantSequences, 43/4417 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown