/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-1-dsl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:34:26,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:34:26,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:34:26,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 20:34:26,810 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-12 20:34:26,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-12 20:34:26,813 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-12 20:34:26,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-12 20:34:26,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-12 20:34:26,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-12 20:34:26,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-12 20:34:26,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-12 20:34:26,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 20:34:26,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 20:34:26,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 20:34:26,820 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 [2021-06-12 20:34:26,853 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:34:26,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:34:26,854 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:34:26,854 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:34:26,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:34:26,856 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:34:26,856 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:34:26,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:34:26,857 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:34:26,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:34:26,858 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:34:26,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:34:26,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:34:26,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:34:26,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:34:26,859 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:34:26,859 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:34:26,859 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:34:26,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:34:26,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:34:26,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:34:26,860 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:34:26,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:34:26,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:34:26,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:34:26,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:34:26,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:34:26,861 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:34:26,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:34:26,861 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:34:26,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:34:26,861 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:34:27,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:34:27,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:34:27,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:34:27,210 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:34:27,217 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:34:27,218 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl [2021-06-12 20:34:27,218 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl' [2021-06-12 20:34:27,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:34:27,269 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:34:27,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:34:27,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:34:27,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:34:27,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:34:27" (1/1) ... [2021-06-12 20:34:27,290 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:34:27" (1/1) ... [2021-06-12 20:34:27,297 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:34:27,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:34:27,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:34:27,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:34:27,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:34:27" (1/1) ... [2021-06-12 20:34:27,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:34:27" (1/1) ... [2021-06-12 20:34:27,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:34:27" (1/1) ... [2021-06-12 20:34:27,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:34:27" (1/1) ... [2021-06-12 20:34:27,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:34:27" (1/1) ... [2021-06-12 20:34:27,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:34:27" (1/1) ... [2021-06-12 20:34:27,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:34:27" (1/1) ... [2021-06-12 20:34:27,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:34:27,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:34:27,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:34:27,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:34:27,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:34:27" (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 [2021-06-12 20:34:27,404 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:34:27,404 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:34:27,405 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:34:27,405 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:34:27,405 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:34:27,405 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:34:27,405 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:34:27,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:34:27,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:34:27,406 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 20:34:27,407 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 20:34:27,407 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 20:34:27,408 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-12 20:34:27,408 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-12 20:34:27,408 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-12 20:34:27,408 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-06-12 20:34:27,408 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-06-12 20:34:27,408 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-06-12 20:34:27,409 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-06-12 20:34:27,409 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-06-12 20:34:27,409 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-06-12 20:34:27,410 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 20:34:27,660 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:34:27,661 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-12 20:34:27,661 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-12 20:34:27,662 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-12 20:34:27,662 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-06-12 20:34:27,662 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-06-12 20:34:27,663 INFO L202 PluginConnector]: Adding new model parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:34:27 BoogieIcfgContainer [2021-06-12 20:34:27,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:34:27,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:34:27,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:34:27,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:34:27,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:34:27" (1/2) ... [2021-06-12 20:34:27,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1981a9 and model type parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:34:27, skipping insertion in model container [2021-06-12 20:34:27,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:34:27" (2/2) ... [2021-06-12 20:34:27,669 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-1-dsl.wvr.bpl [2021-06-12 20:34:27,694 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:34:27,694 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:34:27,695 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:34:27,695 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:34:27,830 INFO L149 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-06-12 20:34:27,849 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-12 20:34:27,872 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:34:27,873 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:34:27,873 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:34:27,873 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:34:27,873 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:34:27,873 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:34:27,873 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:34:27,873 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread4Thread1of1ForFork1======== [2021-06-12 20:34:27,887 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-06-12 20:34:27,951 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:27,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:27,975 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 20:34:27,976 INFO L301 ceAbstractionStarter]: Result for error location thread4Thread1of1ForFork1 was SAFE (1/5) [2021-06-12 20:34:27,978 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-12 20:34:27,985 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:34:27,986 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:34:27,986 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:34:27,986 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:34:27,986 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:34:27,986 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:34:27,986 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:34:27,986 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread1======== [2021-06-12 20:34:27,991 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-06-12 20:34:28,004 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:28,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:28,007 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 20:34:28,007 INFO L301 ceAbstractionStarter]: Result for error location thread1 was SAFE (2/5) [2021-06-12 20:34:28,008 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-12 20:34:28,010 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:34:28,010 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:34:28,010 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:34:28,010 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:34:28,010 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:34:28,011 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:34:28,011 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:34:28,011 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread4======== [2021-06-12 20:34:28,014 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-06-12 20:34:28,029 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:28,030 INFO L276 IsEmpty]: Start isEmpty. Operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:28,032 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 20:34:28,033 INFO L301 ceAbstractionStarter]: Result for error location thread4 was SAFE (3/5) [2021-06-12 20:34:28,033 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-12 20:34:28,035 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:34:28,035 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:34:28,036 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:34:28,036 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:34:28,036 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:34:28,036 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:34:28,036 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:34:28,036 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread1Thread1of1ForFork0======== [2021-06-12 20:34:28,040 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-06-12 20:34:28,063 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:28,065 INFO L276 IsEmpty]: Start isEmpty. Operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:28,067 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 20:34:28,067 INFO L301 ceAbstractionStarter]: Result for error location thread1Thread1of1ForFork0 was SAFE (4/5) [2021-06-12 20:34:28,067 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 20:34:28,070 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:34:28,070 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:34:28,070 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:34:28,070 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:34:28,070 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:34:28,070 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:34:28,070 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:34:28,070 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:34:28,072 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-06-12 20:34:28,087 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:28,088 INFO L276 IsEmpty]: Start isEmpty. Operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:28,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:34:28,090 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:28,091 INFO L472 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] [2021-06-12 20:34:28,091 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:28,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:28,095 INFO L82 PathProgramCache]: Analyzing trace with hash 361941206, now seen corresponding path program 1 times [2021-06-12 20:34:28,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:28,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026733337] [2021-06-12 20:34:28,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:28,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:28,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026733337] [2021-06-12 20:34:28,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026733337] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:34:28,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:34:28,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:34:28,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32071809] [2021-06-12 20:34:28,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:34:28,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:28,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:34:28,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:34:28,361 INFO L87 Difference]: Start difference. First operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:28,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:28,450 INFO L93 Difference]: Finished difference Result 1089 states and 4336 transitions. [2021-06-12 20:34:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:34:28,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:34:28,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:28,482 INFO L225 Difference]: With dead ends: 1089 [2021-06-12 20:34:28,483 INFO L226 Difference]: Without dead ends: 1068 [2021-06-12 20:34:28,484 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:34:28,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-06-12 20:34:28,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 525. [2021-06-12 20:34:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.881679389312977) internal successors, (2034), 524 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:28,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 2034 transitions. [2021-06-12 20:34:28,596 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 2034 transitions. Word has length 22 [2021-06-12 20:34:28,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:28,597 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 2034 transitions. [2021-06-12 20:34:28,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 2034 transitions. [2021-06-12 20:34:28,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:34:28,606 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:28,606 INFO L472 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] [2021-06-12 20:34:28,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:34:28,611 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:28,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:28,612 INFO L82 PathProgramCache]: Analyzing trace with hash -250335374, now seen corresponding path program 2 times [2021-06-12 20:34:28,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:28,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483327123] [2021-06-12 20:34:28,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:28,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:28,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483327123] [2021-06-12 20:34:28,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483327123] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:34:28,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:34:28,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:34:28,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209416463] [2021-06-12 20:34:28,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:34:28,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:28,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:34:28,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:34:28,681 INFO L87 Difference]: Start difference. First operand 525 states and 2034 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:28,736 INFO L93 Difference]: Finished difference Result 1218 states and 4830 transitions. [2021-06-12 20:34:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:34:28,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:34:28,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:28,747 INFO L225 Difference]: With dead ends: 1218 [2021-06-12 20:34:28,747 INFO L226 Difference]: Without dead ends: 1197 [2021-06-12 20:34:28,747 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:34:28,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-06-12 20:34:28,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 545. [2021-06-12 20:34:28,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 3.8529411764705883) internal successors, (2096), 544 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:28,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 2096 transitions. [2021-06-12 20:34:28,782 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 2096 transitions. Word has length 22 [2021-06-12 20:34:28,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:28,783 INFO L482 AbstractCegarLoop]: Abstraction has 545 states and 2096 transitions. [2021-06-12 20:34:28,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:28,783 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 2096 transitions. [2021-06-12 20:34:28,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:34:28,785 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:28,785 INFO L472 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] [2021-06-12 20:34:28,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 20:34:28,785 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:28,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:28,785 INFO L82 PathProgramCache]: Analyzing trace with hash 568064983, now seen corresponding path program 1 times [2021-06-12 20:34:28,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:28,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004493] [2021-06-12 20:34:28,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:28,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:28,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004493] [2021-06-12 20:34:28,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004493] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:34:28,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:34:28,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:34:28,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102123894] [2021-06-12 20:34:28,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:34:28,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:28,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:34:28,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:34:28,833 INFO L87 Difference]: Start difference. First operand 545 states and 2096 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:28,858 INFO L93 Difference]: Finished difference Result 545 states and 1997 transitions. [2021-06-12 20:34:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:34:28,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:34:28,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:28,864 INFO L225 Difference]: With dead ends: 545 [2021-06-12 20:34:28,864 INFO L226 Difference]: Without dead ends: 529 [2021-06-12 20:34:28,864 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:34:28,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-12 20:34:28,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2021-06-12 20:34:28,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.6761363636363638) internal successors, (1941), 528 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:28,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1941 transitions. [2021-06-12 20:34:28,882 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1941 transitions. Word has length 24 [2021-06-12 20:34:28,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:28,883 INFO L482 AbstractCegarLoop]: Abstraction has 529 states and 1941 transitions. [2021-06-12 20:34:28,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:28,883 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1941 transitions. [2021-06-12 20:34:28,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:34:28,886 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:28,886 INFO L472 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] [2021-06-12 20:34:28,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 20:34:28,886 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:28,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:28,886 INFO L82 PathProgramCache]: Analyzing trace with hash -2009965705, now seen corresponding path program 1 times [2021-06-12 20:34:28,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:28,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647006328] [2021-06-12 20:34:28,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:28,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:28,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647006328] [2021-06-12 20:34:28,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647006328] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:34:28,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:34:28,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:34:28,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530276416] [2021-06-12 20:34:28,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:34:28,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:28,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:34:28,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:34:28,949 INFO L87 Difference]: Start difference. First operand 529 states and 1941 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:29,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:29,074 INFO L93 Difference]: Finished difference Result 1358 states and 5017 transitions. [2021-06-12 20:34:29,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:34:29,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:34:29,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:29,082 INFO L225 Difference]: With dead ends: 1358 [2021-06-12 20:34:29,082 INFO L226 Difference]: Without dead ends: 1346 [2021-06-12 20:34:29,082 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:34:29,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2021-06-12 20:34:29,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 680. [2021-06-12 20:34:29,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.787923416789396) internal successors, (2572), 679 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2572 transitions. [2021-06-12 20:34:29,112 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2572 transitions. Word has length 24 [2021-06-12 20:34:29,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:29,112 INFO L482 AbstractCegarLoop]: Abstraction has 680 states and 2572 transitions. [2021-06-12 20:34:29,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:29,113 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2572 transitions. [2021-06-12 20:34:29,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:34:29,114 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:29,115 INFO L472 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] [2021-06-12 20:34:29,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 20:34:29,115 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:29,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:29,115 INFO L82 PathProgramCache]: Analyzing trace with hash 881171321, now seen corresponding path program 1 times [2021-06-12 20:34:29,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:29,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823031924] [2021-06-12 20:34:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:29,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:29,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823031924] [2021-06-12 20:34:29,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823031924] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:34:29,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:34:29,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:34:29,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904538682] [2021-06-12 20:34:29,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:34:29,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:29,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:34:29,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:34:29,135 INFO L87 Difference]: Start difference. First operand 680 states and 2572 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:29,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:29,161 INFO L93 Difference]: Finished difference Result 652 states and 2325 transitions. [2021-06-12 20:34:29,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:34:29,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:34:29,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:29,165 INFO L225 Difference]: With dead ends: 652 [2021-06-12 20:34:29,165 INFO L226 Difference]: Without dead ends: 604 [2021-06-12 20:34:29,165 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:34:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-12 20:34:29,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-06-12 20:34:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 3.583747927031509) internal successors, (2161), 603 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:29,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 2161 transitions. [2021-06-12 20:34:29,185 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 2161 transitions. Word has length 24 [2021-06-12 20:34:29,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:29,185 INFO L482 AbstractCegarLoop]: Abstraction has 604 states and 2161 transitions. [2021-06-12 20:34:29,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:29,185 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 2161 transitions. [2021-06-12 20:34:29,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:34:29,187 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:29,187 INFO L472 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] [2021-06-12 20:34:29,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 20:34:29,188 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:29,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:29,188 INFO L82 PathProgramCache]: Analyzing trace with hash 456543479, now seen corresponding path program 1 times [2021-06-12 20:34:29,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:29,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178929020] [2021-06-12 20:34:29,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:29,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:29,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178929020] [2021-06-12 20:34:29,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178929020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:29,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347280802] [2021-06-12 20:34:29,228 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 [2021-06-12 20:34:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:29,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:34:29,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:29,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347280802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:29,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:29,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 20:34:29,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291971429] [2021-06-12 20:34:29,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:34:29,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:29,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:34:29,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:34:29,514 INFO L87 Difference]: Start difference. First operand 604 states and 2161 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:29,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:29,596 INFO L93 Difference]: Finished difference Result 1057 states and 3653 transitions. [2021-06-12 20:34:29,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:34:29,597 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:34:29,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:29,603 INFO L225 Difference]: With dead ends: 1057 [2021-06-12 20:34:29,603 INFO L226 Difference]: Without dead ends: 989 [2021-06-12 20:34:29,605 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:34:29,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-06-12 20:34:29,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 685. [2021-06-12 20:34:29,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.6271929824561404) internal successors, (2481), 684 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:29,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2481 transitions. [2021-06-12 20:34:29,636 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2481 transitions. Word has length 24 [2021-06-12 20:34:29,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:29,636 INFO L482 AbstractCegarLoop]: Abstraction has 685 states and 2481 transitions. [2021-06-12 20:34:29,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:29,637 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2481 transitions. [2021-06-12 20:34:29,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:34:29,639 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:29,639 INFO L472 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] [2021-06-12 20:34:29,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-06-12 20:34:29,853 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:29,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:29,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1051081059, now seen corresponding path program 2 times [2021-06-12 20:34:29,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:29,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011446641] [2021-06-12 20:34:29,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:29,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:29,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011446641] [2021-06-12 20:34:29,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011446641] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:34:29,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:34:29,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:34:29,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554449804] [2021-06-12 20:34:29,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:34:29,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:29,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:34:29,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:34:29,885 INFO L87 Difference]: Start difference. First operand 685 states and 2481 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:29,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:29,951 INFO L93 Difference]: Finished difference Result 990 states and 3448 transitions. [2021-06-12 20:34:29,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:34:29,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:34:29,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:29,957 INFO L225 Difference]: With dead ends: 990 [2021-06-12 20:34:29,957 INFO L226 Difference]: Without dead ends: 963 [2021-06-12 20:34:29,957 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:34:29,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-06-12 20:34:29,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 703. [2021-06-12 20:34:29,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.6210826210826212) internal successors, (2542), 702 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:29,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2542 transitions. [2021-06-12 20:34:29,978 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2542 transitions. Word has length 24 [2021-06-12 20:34:29,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:29,979 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 2542 transitions. [2021-06-12 20:34:29,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:29,979 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2542 transitions. [2021-06-12 20:34:29,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:34:29,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:29,981 INFO L472 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] [2021-06-12 20:34:29,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 20:34:29,981 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:29,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:29,982 INFO L82 PathProgramCache]: Analyzing trace with hash -219308433, now seen corresponding path program 2 times [2021-06-12 20:34:29,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:29,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610617790] [2021-06-12 20:34:29,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:30,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:30,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:30,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610617790] [2021-06-12 20:34:30,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610617790] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:34:30,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:34:30,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:34:30,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053451936] [2021-06-12 20:34:30,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:34:30,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:30,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:34:30,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:34:30,021 INFO L87 Difference]: Start difference. First operand 703 states and 2542 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:30,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:30,082 INFO L93 Difference]: Finished difference Result 1033 states and 3563 transitions. [2021-06-12 20:34:30,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:34:30,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:34:30,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:30,087 INFO L225 Difference]: With dead ends: 1033 [2021-06-12 20:34:30,088 INFO L226 Difference]: Without dead ends: 949 [2021-06-12 20:34:30,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:34:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-06-12 20:34:30,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 628. [2021-06-12 20:34:30,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.5964912280701755) internal successors, (2255), 627 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:30,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2255 transitions. [2021-06-12 20:34:30,107 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2255 transitions. Word has length 24 [2021-06-12 20:34:30,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:30,108 INFO L482 AbstractCegarLoop]: Abstraction has 628 states and 2255 transitions. [2021-06-12 20:34:30,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:30,108 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2255 transitions. [2021-06-12 20:34:30,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:34:30,110 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:30,110 INFO L472 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] [2021-06-12 20:34:30,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 20:34:30,110 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:30,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:30,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1513578361, now seen corresponding path program 3 times [2021-06-12 20:34:30,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:30,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52509404] [2021-06-12 20:34:30,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:30,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:30,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52509404] [2021-06-12 20:34:30,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52509404] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:34:30,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:34:30,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:34:30,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580313523] [2021-06-12 20:34:30,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:34:30,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:30,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:34:30,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:34:30,145 INFO L87 Difference]: Start difference. First operand 628 states and 2255 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:30,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:30,215 INFO L93 Difference]: Finished difference Result 847 states and 3018 transitions. [2021-06-12 20:34:30,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:34:30,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:34:30,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:30,220 INFO L225 Difference]: With dead ends: 847 [2021-06-12 20:34:30,220 INFO L226 Difference]: Without dead ends: 827 [2021-06-12 20:34:30,220 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:34:30,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-06-12 20:34:30,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 620. [2021-06-12 20:34:30,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.61389337641357) internal successors, (2237), 619 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:30,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2237 transitions. [2021-06-12 20:34:30,239 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2237 transitions. Word has length 24 [2021-06-12 20:34:30,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:30,239 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 2237 transitions. [2021-06-12 20:34:30,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:30,239 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2237 transitions. [2021-06-12 20:34:30,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:34:30,241 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:30,241 INFO L472 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] [2021-06-12 20:34:30,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-12 20:34:30,242 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:30,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:30,242 INFO L82 PathProgramCache]: Analyzing trace with hash -939014659, now seen corresponding path program 3 times [2021-06-12 20:34:30,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:30,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246001358] [2021-06-12 20:34:30,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:30,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:30,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246001358] [2021-06-12 20:34:30,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246001358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:30,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731078999] [2021-06-12 20:34:30,286 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 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 [2021-06-12 20:34:30,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:34:30,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:30,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:34:30,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:30,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731078999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:30,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:30,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 20:34:30,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759807752] [2021-06-12 20:34:30,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:34:30,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:30,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:34:30,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:34:30,450 INFO L87 Difference]: Start difference. First operand 620 states and 2237 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:30,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:30,545 INFO L93 Difference]: Finished difference Result 857 states and 3066 transitions. [2021-06-12 20:34:30,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:34:30,545 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:34:30,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:30,549 INFO L225 Difference]: With dead ends: 857 [2021-06-12 20:34:30,550 INFO L226 Difference]: Without dead ends: 857 [2021-06-12 20:34:30,550 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:34:30,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-06-12 20:34:30,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 548. [2021-06-12 20:34:30,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.579524680073126) internal successors, (1958), 547 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1958 transitions. [2021-06-12 20:34:30,567 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1958 transitions. Word has length 24 [2021-06-12 20:34:30,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:30,567 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1958 transitions. [2021-06-12 20:34:30,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:30,567 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1958 transitions. [2021-06-12 20:34:30,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:34:30,571 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:30,571 INFO L472 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] [2021-06-12 20:34:30,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 20:34:30,795 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:30,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:30,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1997239533, now seen corresponding path program 4 times [2021-06-12 20:34:30,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:30,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398652940] [2021-06-12 20:34:30,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:30,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:30,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398652940] [2021-06-12 20:34:30,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398652940] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:34:30,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:34:30,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:34:30,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154694145] [2021-06-12 20:34:30,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:34:30,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:30,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:34:30,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:34:30,819 INFO L87 Difference]: Start difference. First operand 548 states and 1958 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:30,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:30,898 INFO L93 Difference]: Finished difference Result 866 states and 3014 transitions. [2021-06-12 20:34:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:34:30,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:34:30,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:30,903 INFO L225 Difference]: With dead ends: 866 [2021-06-12 20:34:30,903 INFO L226 Difference]: Without dead ends: 842 [2021-06-12 20:34:30,904 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:34:30,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-06-12 20:34:30,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 608. [2021-06-12 20:34:30,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.602965403624382) internal successors, (2187), 607 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 2187 transitions. [2021-06-12 20:34:30,922 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 2187 transitions. Word has length 24 [2021-06-12 20:34:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:30,923 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 2187 transitions. [2021-06-12 20:34:30,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:30,923 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 2187 transitions. [2021-06-12 20:34:30,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:34:30,924 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:30,925 INFO L472 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] [2021-06-12 20:34:30,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-12 20:34:30,925 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:30,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:30,926 INFO L82 PathProgramCache]: Analyzing trace with hash 469269651, now seen corresponding path program 4 times [2021-06-12 20:34:30,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:30,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598591811] [2021-06-12 20:34:30,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:30,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:30,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598591811] [2021-06-12 20:34:30,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598591811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:30,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119997124] [2021-06-12 20:34:30,973 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 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 [2021-06-12 20:34:31,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:34:31,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:31,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:34:31,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:31,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119997124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:31,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:31,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 20:34:31,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048518957] [2021-06-12 20:34:31,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:34:31,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:31,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:34:31,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:34:31,108 INFO L87 Difference]: Start difference. First operand 608 states and 2187 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2021-06-12 20:34:31,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:31,186 INFO L93 Difference]: Finished difference Result 825 states and 2855 transitions. [2021-06-12 20:34:31,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:34:31,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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 24 [2021-06-12 20:34:31,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:31,190 INFO L225 Difference]: With dead ends: 825 [2021-06-12 20:34:31,190 INFO L226 Difference]: Without dead ends: 757 [2021-06-12 20:34:31,190 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:34:31,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-06-12 20:34:31,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 603. [2021-06-12 20:34:31,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 3.5930232558139537) internal successors, (2163), 602 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:31,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 2163 transitions. [2021-06-12 20:34:31,207 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 2163 transitions. Word has length 24 [2021-06-12 20:34:31,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:31,207 INFO L482 AbstractCegarLoop]: Abstraction has 603 states and 2163 transitions. [2021-06-12 20:34:31,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2021-06-12 20:34:31,207 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 2163 transitions. [2021-06-12 20:34:31,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:34:31,209 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:31,209 INFO L472 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] [2021-06-12 20:34:31,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-12 20:34:31,425 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:31,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:31,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1038354887, now seen corresponding path program 5 times [2021-06-12 20:34:31,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:31,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515046368] [2021-06-12 20:34:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:31,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:31,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515046368] [2021-06-12 20:34:31,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515046368] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:34:31,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:34:31,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:34:31,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287375667] [2021-06-12 20:34:31,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:34:31,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:31,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:34:31,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:34:31,446 INFO L87 Difference]: Start difference. First operand 603 states and 2163 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:31,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:31,554 INFO L93 Difference]: Finished difference Result 985 states and 3379 transitions. [2021-06-12 20:34:31,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:34:31,554 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:34:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:31,560 INFO L225 Difference]: With dead ends: 985 [2021-06-12 20:34:31,560 INFO L226 Difference]: Without dead ends: 946 [2021-06-12 20:34:31,560 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:34:31,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-12 20:34:31,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 591. [2021-06-12 20:34:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.6) internal successors, (2124), 590 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 2124 transitions. [2021-06-12 20:34:31,590 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 2124 transitions. Word has length 24 [2021-06-12 20:34:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:31,591 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 2124 transitions. [2021-06-12 20:34:31,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:31,591 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 2124 transitions. [2021-06-12 20:34:31,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:34:31,596 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:31,597 INFO L472 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] [2021-06-12 20:34:31,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-12 20:34:31,598 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:31,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:31,599 INFO L82 PathProgramCache]: Analyzing trace with hash -206582261, now seen corresponding path program 5 times [2021-06-12 20:34:31,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:31,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847955227] [2021-06-12 20:34:31,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:31,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:31,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847955227] [2021-06-12 20:34:31,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847955227] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:34:31,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:34:31,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:34:31,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899098423] [2021-06-12 20:34:31,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:34:31,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:31,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:34:31,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:34:31,624 INFO L87 Difference]: Start difference. First operand 591 states and 2124 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:31,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:31,681 INFO L93 Difference]: Finished difference Result 783 states and 2748 transitions. [2021-06-12 20:34:31,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:34:31,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:34:31,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:31,686 INFO L225 Difference]: With dead ends: 783 [2021-06-12 20:34:31,686 INFO L226 Difference]: Without dead ends: 783 [2021-06-12 20:34:31,686 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:34:31,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-06-12 20:34:31,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 582. [2021-06-12 20:34:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 3.604130808950086) internal successors, (2094), 581 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 2094 transitions. [2021-06-12 20:34:31,703 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 2094 transitions. Word has length 24 [2021-06-12 20:34:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:31,704 INFO L482 AbstractCegarLoop]: Abstraction has 582 states and 2094 transitions. [2021-06-12 20:34:31,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 2094 transitions. [2021-06-12 20:34:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:34:31,705 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:31,705 INFO L472 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] [2021-06-12 20:34:31,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-12 20:34:31,706 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:31,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:31,706 INFO L82 PathProgramCache]: Analyzing trace with hash 831548115, now seen corresponding path program 6 times [2021-06-12 20:34:31,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:31,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268211904] [2021-06-12 20:34:31,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:31,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:31,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:31,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268211904] [2021-06-12 20:34:31,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268211904] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:34:31,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:34:31,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:34:31,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155303205] [2021-06-12 20:34:31,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:34:31,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:31,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:34:31,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:34:31,728 INFO L87 Difference]: Start difference. First operand 582 states and 2094 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:31,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:31,788 INFO L93 Difference]: Finished difference Result 597 states and 2122 transitions. [2021-06-12 20:34:31,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:34:31,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:34:31,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:31,802 INFO L225 Difference]: With dead ends: 597 [2021-06-12 20:34:31,802 INFO L226 Difference]: Without dead ends: 565 [2021-06-12 20:34:31,802 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:34:31,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-12 20:34:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-06-12 20:34:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 3.6382978723404253) internal successors, (2052), 564 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 2052 transitions. [2021-06-12 20:34:31,820 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 2052 transitions. Word has length 24 [2021-06-12 20:34:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:31,820 INFO L482 AbstractCegarLoop]: Abstraction has 565 states and 2052 transitions. [2021-06-12 20:34:31,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:31,833 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 2052 transitions. [2021-06-12 20:34:31,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:34:31,834 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:31,834 INFO L472 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] [2021-06-12 20:34:31,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-12 20:34:31,835 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:31,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:31,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1474843077, now seen corresponding path program 6 times [2021-06-12 20:34:31,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:31,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311513616] [2021-06-12 20:34:31,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:31,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:31,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311513616] [2021-06-12 20:34:31,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311513616] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:34:31,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:34:31,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:34:31,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054610658] [2021-06-12 20:34:31,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:34:31,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:31,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:34:31,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:34:31,860 INFO L87 Difference]: Start difference. First operand 565 states and 2052 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:31,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:31,912 INFO L93 Difference]: Finished difference Result 595 states and 2146 transitions. [2021-06-12 20:34:31,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:34:31,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:34:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:31,914 INFO L225 Difference]: With dead ends: 595 [2021-06-12 20:34:31,914 INFO L226 Difference]: Without dead ends: 595 [2021-06-12 20:34:31,915 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:34:31,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-12 20:34:31,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 487. [2021-06-12 20:34:31,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.625514403292181) internal successors, (1762), 486 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:31,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1762 transitions. [2021-06-12 20:34:31,926 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1762 transitions. Word has length 24 [2021-06-12 20:34:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:31,926 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1762 transitions. [2021-06-12 20:34:31,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:31,926 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1762 transitions. [2021-06-12 20:34:31,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:31,928 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:31,929 INFO L472 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] [2021-06-12 20:34:31,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-12 20:34:31,929 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:31,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:31,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1291494568, now seen corresponding path program 1 times [2021-06-12 20:34:31,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:31,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067506835] [2021-06-12 20:34:31,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:32,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:32,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067506835] [2021-06-12 20:34:32,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067506835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:32,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963741157] [2021-06-12 20:34:32,052 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 [2021-06-12 20:34:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:32,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:34:32,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:32,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:32,347 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 [2021-06-12 20:34:32,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:32,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:32,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:32,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:34:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:32,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963741157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:32,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:32,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:34:32,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357814358] [2021-06-12 20:34:32,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:34:32,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:32,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:34:32,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:34:32,412 INFO L87 Difference]: Start difference. First operand 487 states and 1762 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:32,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:32,806 INFO L93 Difference]: Finished difference Result 985 states and 3663 transitions. [2021-06-12 20:34:32,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:34:32,807 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:34:32,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:32,811 INFO L225 Difference]: With dead ends: 985 [2021-06-12 20:34:32,812 INFO L226 Difference]: Without dead ends: 904 [2021-06-12 20:34:32,812 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 239.7ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:34:32,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-06-12 20:34:32,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 559. [2021-06-12 20:34:32,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 3.6469534050179213) internal successors, (2035), 558 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 2035 transitions. [2021-06-12 20:34:32,827 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 2035 transitions. Word has length 26 [2021-06-12 20:34:32,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:32,827 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 2035 transitions. [2021-06-12 20:34:32,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 2035 transitions. [2021-06-12 20:34:32,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:32,829 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:32,829 INFO L472 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] [2021-06-12 20:34:33,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:33,045 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:33,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:33,045 INFO L82 PathProgramCache]: Analyzing trace with hash 13244826, now seen corresponding path program 1 times [2021-06-12 20:34:33,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:33,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821804028] [2021-06-12 20:34:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:33,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:33,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821804028] [2021-06-12 20:34:33,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821804028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:33,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389466537] [2021-06-12 20:34:33,180 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 [2021-06-12 20:34:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:33,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:34:33,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:33,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:33,423 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 [2021-06-12 20:34:33,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:33,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:33,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:33,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:34:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:33,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389466537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:33,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:33,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:34:33,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070653610] [2021-06-12 20:34:33,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:34:33,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:33,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:34:33,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:34:33,481 INFO L87 Difference]: Start difference. First operand 559 states and 2035 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:34:33,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:33,930 INFO L93 Difference]: Finished difference Result 985 states and 3680 transitions. [2021-06-12 20:34:33,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:34:33,931 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 26 [2021-06-12 20:34:33,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:33,934 INFO L225 Difference]: With dead ends: 985 [2021-06-12 20:34:33,934 INFO L226 Difference]: Without dead ends: 904 [2021-06-12 20:34:33,935 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:34:33,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-06-12 20:34:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 569. [2021-06-12 20:34:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.653169014084507) internal successors, (2075), 568 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:33,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 2075 transitions. [2021-06-12 20:34:33,954 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 2075 transitions. Word has length 26 [2021-06-12 20:34:33,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:33,954 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 2075 transitions. [2021-06-12 20:34:33,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:34:33,954 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 2075 transitions. [2021-06-12 20:34:33,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:33,956 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:33,956 INFO L472 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] [2021-06-12 20:34:34,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 20:34:34,179 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:34,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:34,179 INFO L82 PathProgramCache]: Analyzing trace with hash -848673696, now seen corresponding path program 2 times [2021-06-12 20:34:34,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:34,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258046290] [2021-06-12 20:34:34,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:34:34,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:34,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258046290] [2021-06-12 20:34:34,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258046290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:34,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805752034] [2021-06-12 20:34:34,290 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 [2021-06-12 20:34:34,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:34:34,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:34,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:34:34,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:34,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:34,414 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 [2021-06-12 20:34:34,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:34:34,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:34,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:34,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:34:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:34,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805752034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:34,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:34,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:34:34,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691635693] [2021-06-12 20:34:34,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:34:34,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:34,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:34:34,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:34:34,619 INFO L87 Difference]: Start difference. First operand 569 states and 2075 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2021-06-12 20:34:35,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:35,885 INFO L93 Difference]: Finished difference Result 2058 states and 7632 transitions. [2021-06-12 20:34:35,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:34:35,886 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 26 [2021-06-12 20:34:35,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:35,892 INFO L225 Difference]: With dead ends: 2058 [2021-06-12 20:34:35,892 INFO L226 Difference]: Without dead ends: 1785 [2021-06-12 20:34:35,892 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 926.5ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:34:35,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2021-06-12 20:34:35,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 654. [2021-06-12 20:34:35,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 3.7304747320061256) internal successors, (2436), 653 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:35,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 2436 transitions. [2021-06-12 20:34:35,914 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 2436 transitions. Word has length 26 [2021-06-12 20:34:35,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:35,914 INFO L482 AbstractCegarLoop]: Abstraction has 654 states and 2436 transitions. [2021-06-12 20:34:35,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2021-06-12 20:34:35,914 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 2436 transitions. [2021-06-12 20:34:35,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:35,916 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:35,916 INFO L472 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] [2021-06-12 20:34:36,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:36,133 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:36,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:36,133 INFO L82 PathProgramCache]: Analyzing trace with hash 704098248, now seen corresponding path program 3 times [2021-06-12 20:34:36,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:36,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590320657] [2021-06-12 20:34:36,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:34:36,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:36,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590320657] [2021-06-12 20:34:36,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590320657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:36,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30729857] [2021-06-12 20:34:36,253 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 [2021-06-12 20:34:36,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:34:36,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:36,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:34:36,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:36,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:36,385 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 [2021-06-12 20:34:36,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:34:36,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:36,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:36,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:34:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:36,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30729857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:36,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:36,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:34:36,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367606880] [2021-06-12 20:34:36,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:34:36,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:36,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:34:36,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:34:36,544 INFO L87 Difference]: Start difference. First operand 654 states and 2436 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2021-06-12 20:34:37,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:37,766 INFO L93 Difference]: Finished difference Result 2227 states and 8282 transitions. [2021-06-12 20:34:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:34:37,767 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 26 [2021-06-12 20:34:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:37,773 INFO L225 Difference]: With dead ends: 2227 [2021-06-12 20:34:37,773 INFO L226 Difference]: Without dead ends: 1955 [2021-06-12 20:34:37,774 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 858.3ms TimeCoverageRelationStatistics Valid=319, Invalid=1163, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:34:37,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2021-06-12 20:34:37,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 695. [2021-06-12 20:34:37,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.80835734870317) internal successors, (2643), 694 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2643 transitions. [2021-06-12 20:34:37,796 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2643 transitions. Word has length 26 [2021-06-12 20:34:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:37,796 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 2643 transitions. [2021-06-12 20:34:37,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2021-06-12 20:34:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2643 transitions. [2021-06-12 20:34:37,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:37,798 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:37,799 INFO L472 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] [2021-06-12 20:34:38,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:38,022 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:38,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:38,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1279803746, now seen corresponding path program 2 times [2021-06-12 20:34:38,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:38,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191059712] [2021-06-12 20:34:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:38,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:38,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191059712] [2021-06-12 20:34:38,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191059712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:38,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184145598] [2021-06-12 20:34:38,128 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 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 [2021-06-12 20:34:38,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:34:38,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:38,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:34:38,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:38,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:38,250 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 [2021-06-12 20:34:38,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:34:38,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:38,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:38,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:34:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:38,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184145598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:38,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:38,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:34:38,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554220258] [2021-06-12 20:34:38,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:34:38,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:38,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:34:38,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:34:38,481 INFO L87 Difference]: Start difference. First operand 695 states and 2643 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:39,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:39,618 INFO L93 Difference]: Finished difference Result 1519 states and 5838 transitions. [2021-06-12 20:34:39,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:34:39,619 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:34:39,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:39,624 INFO L225 Difference]: With dead ends: 1519 [2021-06-12 20:34:39,624 INFO L226 Difference]: Without dead ends: 1446 [2021-06-12 20:34:39,626 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 813.2ms TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:34:39,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2021-06-12 20:34:39,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 706. [2021-06-12 20:34:39,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.819858156028369) internal successors, (2693), 705 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:39,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2693 transitions. [2021-06-12 20:34:39,651 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2693 transitions. Word has length 26 [2021-06-12 20:34:39,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:39,651 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2693 transitions. [2021-06-12 20:34:39,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:39,652 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2693 transitions. [2021-06-12 20:34:39,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:39,653 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:39,654 INFO L472 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] [2021-06-12 20:34:39,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 20:34:39,869 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:39,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:39,869 INFO L82 PathProgramCache]: Analyzing trace with hash -115783330, now seen corresponding path program 3 times [2021-06-12 20:34:39,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:39,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434227130] [2021-06-12 20:34:39,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:39,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:39,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434227130] [2021-06-12 20:34:39,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434227130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:39,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906460491] [2021-06-12 20:34:39,977 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 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 [2021-06-12 20:34:40,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:34:40,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:40,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:34:40,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:40,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:40,109 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 [2021-06-12 20:34:40,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:34:40,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:40,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:40,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:34:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:40,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906460491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:40,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:40,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:34:40,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196363536] [2021-06-12 20:34:40,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:34:40,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:40,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:34:40,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:34:40,237 INFO L87 Difference]: Start difference. First operand 706 states and 2693 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:41,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:41,530 INFO L93 Difference]: Finished difference Result 1567 states and 6047 transitions. [2021-06-12 20:34:41,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:34:41,531 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:34:41,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:41,536 INFO L225 Difference]: With dead ends: 1567 [2021-06-12 20:34:41,536 INFO L226 Difference]: Without dead ends: 1484 [2021-06-12 20:34:41,537 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 917.0ms TimeCoverageRelationStatistics Valid=319, Invalid=1241, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:34:41,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2021-06-12 20:34:41,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 704. [2021-06-12 20:34:41,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 3.8207681365576103) internal successors, (2686), 703 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:41,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 2686 transitions. [2021-06-12 20:34:41,556 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 2686 transitions. Word has length 26 [2021-06-12 20:34:41,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:41,557 INFO L482 AbstractCegarLoop]: Abstraction has 704 states and 2686 transitions. [2021-06-12 20:34:41,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:41,558 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 2686 transitions. [2021-06-12 20:34:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:41,559 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:41,559 INFO L472 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] [2021-06-12 20:34:41,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:41,773 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:41,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:41,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1792060410, now seen corresponding path program 1 times [2021-06-12 20:34:41,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:41,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300000571] [2021-06-12 20:34:41,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:41,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:41,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300000571] [2021-06-12 20:34:41,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300000571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:41,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881043390] [2021-06-12 20:34:41,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-12 20:34:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:41,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:34:41,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:41,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:41,993 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 [2021-06-12 20:34:41,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:42,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:42,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:42,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:34:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:42,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881043390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:42,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:42,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:34:42,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907541743] [2021-06-12 20:34:42,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:34:42,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:42,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:34:42,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:34:42,054 INFO L87 Difference]: Start difference. First operand 704 states and 2686 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:42,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:42,255 INFO L93 Difference]: Finished difference Result 1121 states and 4306 transitions. [2021-06-12 20:34:42,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:34:42,255 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:34:42,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:42,259 INFO L225 Difference]: With dead ends: 1121 [2021-06-12 20:34:42,259 INFO L226 Difference]: Without dead ends: 1039 [2021-06-12 20:34:42,259 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:34:42,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-06-12 20:34:42,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 733. [2021-06-12 20:34:42,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.8278688524590163) internal successors, (2802), 732 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2802 transitions. [2021-06-12 20:34:42,275 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2802 transitions. Word has length 26 [2021-06-12 20:34:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:42,275 INFO L482 AbstractCegarLoop]: Abstraction has 733 states and 2802 transitions. [2021-06-12 20:34:42,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2802 transitions. [2021-06-12 20:34:42,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:42,276 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:42,277 INFO L472 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] [2021-06-12 20:34:42,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 20:34:42,477 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:42,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:42,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1071626942, now seen corresponding path program 2 times [2021-06-12 20:34:42,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:42,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681081615] [2021-06-12 20:34:42,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:42,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:42,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681081615] [2021-06-12 20:34:42,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681081615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:42,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102145466] [2021-06-12 20:34:42,565 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 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 [2021-06-12 20:34:42,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:34:42,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:42,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:34:42,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:42,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:42,691 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 [2021-06-12 20:34:42,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:34:42,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:42,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:42,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-12 20:34:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:42,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102145466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:42,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:42,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 20:34:42,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388482008] [2021-06-12 20:34:42,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:34:42,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:42,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:34:42,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:34:42,854 INFO L87 Difference]: Start difference. First operand 733 states and 2802 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:34:43,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:43,583 INFO L93 Difference]: Finished difference Result 1208 states and 4645 transitions. [2021-06-12 20:34:43,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:34:43,583 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 26 [2021-06-12 20:34:43,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:43,586 INFO L225 Difference]: With dead ends: 1208 [2021-06-12 20:34:43,587 INFO L226 Difference]: Without dead ends: 1135 [2021-06-12 20:34:43,587 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 567.0ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:34:43,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-06-12 20:34:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 731. [2021-06-12 20:34:43,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 3.828767123287671) internal successors, (2795), 730 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2795 transitions. [2021-06-12 20:34:43,605 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2795 transitions. Word has length 26 [2021-06-12 20:34:43,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:43,605 INFO L482 AbstractCegarLoop]: Abstraction has 731 states and 2795 transitions. [2021-06-12 20:34:43,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:34:43,605 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2795 transitions. [2021-06-12 20:34:43,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:43,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:43,607 INFO L472 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] [2021-06-12 20:34:43,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 20:34:43,832 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:43,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:43,832 INFO L82 PathProgramCache]: Analyzing trace with hash -126478080, now seen corresponding path program 3 times [2021-06-12 20:34:43,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:43,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222124461] [2021-06-12 20:34:43,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:43,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:43,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222124461] [2021-06-12 20:34:43,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222124461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:43,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694336897] [2021-06-12 20:34:43,920 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 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 [2021-06-12 20:34:43,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:34:43,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:43,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:34:43,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:44,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:44,117 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 16 treesize of output 18 [2021-06-12 20:34:44,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:34:44,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:44,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:44,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-06-12 20:34:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:44,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694336897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:44,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:44,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 20:34:44,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951266531] [2021-06-12 20:34:44,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:34:44,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:44,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:34:44,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:34:44,262 INFO L87 Difference]: Start difference. First operand 731 states and 2795 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-12 20:34:44,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:44,920 INFO L93 Difference]: Finished difference Result 1248 states and 4784 transitions. [2021-06-12 20:34:44,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:34:44,921 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 26 [2021-06-12 20:34:44,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:44,924 INFO L225 Difference]: With dead ends: 1248 [2021-06-12 20:34:44,924 INFO L226 Difference]: Without dead ends: 1177 [2021-06-12 20:34:44,925 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 480.9ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:34:44,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-06-12 20:34:44,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 755. [2021-06-12 20:34:44,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.815649867374005) internal successors, (2877), 754 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:44,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2877 transitions. [2021-06-12 20:34:44,943 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2877 transitions. Word has length 26 [2021-06-12 20:34:44,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:44,943 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2877 transitions. [2021-06-12 20:34:44,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-12 20:34:44,943 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2877 transitions. [2021-06-12 20:34:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:44,945 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:44,945 INFO L472 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] [2021-06-12 20:34:45,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:45,169 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:45,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:45,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1178261314, now seen corresponding path program 1 times [2021-06-12 20:34:45,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:45,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856554942] [2021-06-12 20:34:45,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:45,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:45,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856554942] [2021-06-12 20:34:45,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856554942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:45,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852904592] [2021-06-12 20:34:45,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-12 20:34:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:45,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:34:45,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:45,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:45,431 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 [2021-06-12 20:34:45,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:45,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:45,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:45,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:34:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:45,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852904592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:45,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:45,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:34:45,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725369831] [2021-06-12 20:34:45,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:34:45,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:45,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:34:45,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:34:45,480 INFO L87 Difference]: Start difference. First operand 755 states and 2877 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:34:45,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:45,831 INFO L93 Difference]: Finished difference Result 1113 states and 4258 transitions. [2021-06-12 20:34:45,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:34:45,831 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 26 [2021-06-12 20:34:45,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:45,835 INFO L225 Difference]: With dead ends: 1113 [2021-06-12 20:34:45,835 INFO L226 Difference]: Without dead ends: 1042 [2021-06-12 20:34:45,835 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:34:45,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-06-12 20:34:45,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 731. [2021-06-12 20:34:45,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 3.828767123287671) internal successors, (2795), 730 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:45,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2795 transitions. [2021-06-12 20:34:45,852 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2795 transitions. Word has length 26 [2021-06-12 20:34:45,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:45,853 INFO L482 AbstractCegarLoop]: Abstraction has 731 states and 2795 transitions. [2021-06-12 20:34:45,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:34:45,853 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2795 transitions. [2021-06-12 20:34:45,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:45,854 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:45,854 INFO L472 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] [2021-06-12 20:34:46,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 20:34:46,069 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:46,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:46,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1995337340, now seen corresponding path program 2 times [2021-06-12 20:34:46,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:46,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614128470] [2021-06-12 20:34:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:46,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:46,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614128470] [2021-06-12 20:34:46,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614128470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:46,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954158718] [2021-06-12 20:34:46,153 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 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 [2021-06-12 20:34:46,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:34:46,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:46,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:34:46,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:46,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:46,260 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 [2021-06-12 20:34:46,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:46,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:46,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:46,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:34:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:46,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954158718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:46,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:46,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:34:46,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880890462] [2021-06-12 20:34:46,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:34:46,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:46,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:34:46,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:34:46,329 INFO L87 Difference]: Start difference. First operand 731 states and 2795 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) 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) [2021-06-12 20:34:46,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:46,572 INFO L93 Difference]: Finished difference Result 1082 states and 4150 transitions. [2021-06-12 20:34:46,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:34:46,573 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) 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 26 [2021-06-12 20:34:46,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:46,575 INFO L225 Difference]: With dead ends: 1082 [2021-06-12 20:34:46,575 INFO L226 Difference]: Without dead ends: 1009 [2021-06-12 20:34:46,576 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 166.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:34:46,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-06-12 20:34:46,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 740. [2021-06-12 20:34:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.8335588633288227) internal successors, (2833), 739 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:46,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2833 transitions. [2021-06-12 20:34:46,592 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2833 transitions. Word has length 26 [2021-06-12 20:34:46,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:46,592 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2833 transitions. [2021-06-12 20:34:46,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) 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) [2021-06-12 20:34:46,592 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2833 transitions. [2021-06-12 20:34:46,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:46,594 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:46,594 INFO L472 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] [2021-06-12 20:34:46,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:46,805 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:46,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:46,805 INFO L82 PathProgramCache]: Analyzing trace with hash -489476008, now seen corresponding path program 3 times [2021-06-12 20:34:46,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:46,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86119699] [2021-06-12 20:34:46,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:46,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:46,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86119699] [2021-06-12 20:34:46,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86119699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:46,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998896224] [2021-06-12 20:34:46,884 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 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 [2021-06-12 20:34:46,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:34:46,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:46,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:34:46,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:47,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:47,020 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 11 treesize of output 15 [2021-06-12 20:34:47,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:34:47,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:47,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:47,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-12 20:34:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:47,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998896224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:47,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:47,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 20:34:47,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765028174] [2021-06-12 20:34:47,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:34:47,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:47,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:34:47,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:34:47,170 INFO L87 Difference]: Start difference. First operand 740 states and 2833 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:34:47,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:47,913 INFO L93 Difference]: Finished difference Result 1158 states and 4457 transitions. [2021-06-12 20:34:47,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:34:47,913 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 26 [2021-06-12 20:34:47,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:47,916 INFO L225 Difference]: With dead ends: 1158 [2021-06-12 20:34:47,917 INFO L226 Difference]: Without dead ends: 1083 [2021-06-12 20:34:47,917 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 558.3ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:34:47,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-06-12 20:34:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 736. [2021-06-12 20:34:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.83265306122449) internal successors, (2817), 735 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2817 transitions. [2021-06-12 20:34:47,934 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2817 transitions. Word has length 26 [2021-06-12 20:34:47,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:47,934 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2817 transitions. [2021-06-12 20:34:47,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:34:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2817 transitions. [2021-06-12 20:34:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:47,936 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:47,936 INFO L472 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] [2021-06-12 20:34:48,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 20:34:48,158 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:48,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:48,159 INFO L82 PathProgramCache]: Analyzing trace with hash 197192494, now seen corresponding path program 4 times [2021-06-12 20:34:48,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:48,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943505342] [2021-06-12 20:34:48,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:48,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:48,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943505342] [2021-06-12 20:34:48,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943505342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:48,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321420474] [2021-06-12 20:34:48,273 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 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 [2021-06-12 20:34:48,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:34:48,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:48,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:34:48,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:48,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:48,396 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 [2021-06-12 20:34:48,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:48,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:48,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:48,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-12 20:34:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:48,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321420474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:48,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:48,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:34:48,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530711765] [2021-06-12 20:34:48,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:34:48,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:48,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:34:48,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:34:48,454 INFO L87 Difference]: Start difference. First operand 736 states and 2817 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:48,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:48,828 INFO L93 Difference]: Finished difference Result 1414 states and 5349 transitions. [2021-06-12 20:34:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:34:48,829 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:34:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:48,831 INFO L225 Difference]: With dead ends: 1414 [2021-06-12 20:34:48,831 INFO L226 Difference]: Without dead ends: 1323 [2021-06-12 20:34:48,831 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:34:48,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2021-06-12 20:34:48,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 814. [2021-06-12 20:34:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.88929889298893) internal successors, (3162), 813 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:48,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 3162 transitions. [2021-06-12 20:34:48,850 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 3162 transitions. Word has length 26 [2021-06-12 20:34:48,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:48,850 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 3162 transitions. [2021-06-12 20:34:48,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:48,850 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 3162 transitions. [2021-06-12 20:34:48,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:48,852 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:48,852 INFO L472 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] [2021-06-12 20:34:49,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:49,069 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:49,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:49,069 INFO L82 PathProgramCache]: Analyzing trace with hash -389275864, now seen corresponding path program 4 times [2021-06-12 20:34:49,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:49,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105544114] [2021-06-12 20:34:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:49,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:49,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105544114] [2021-06-12 20:34:49,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105544114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:49,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76220432] [2021-06-12 20:34:49,175 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 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 [2021-06-12 20:34:49,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:34:49,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:49,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:34:49,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:49,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:49,287 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 [2021-06-12 20:34:49,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:49,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:49,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:49,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-12 20:34:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:49,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76220432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:49,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:49,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:34:49,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259178012] [2021-06-12 20:34:49,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:34:49,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:49,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:34:49,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:34:49,336 INFO L87 Difference]: Start difference. First operand 814 states and 3162 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:49,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:49,604 INFO L93 Difference]: Finished difference Result 1224 states and 4746 transitions. [2021-06-12 20:34:49,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:34:49,605 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:34:49,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:49,606 INFO L225 Difference]: With dead ends: 1224 [2021-06-12 20:34:49,607 INFO L226 Difference]: Without dead ends: 1142 [2021-06-12 20:34:49,607 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 192.8ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:34:49,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-06-12 20:34:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 814. [2021-06-12 20:34:49,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.88929889298893) internal successors, (3162), 813 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:49,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 3162 transitions. [2021-06-12 20:34:49,625 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 3162 transitions. Word has length 26 [2021-06-12 20:34:49,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:49,625 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 3162 transitions. [2021-06-12 20:34:49,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:49,625 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 3162 transitions. [2021-06-12 20:34:49,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:49,627 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:49,627 INFO L472 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] [2021-06-12 20:34:49,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-12 20:34:49,837 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:49,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:49,837 INFO L82 PathProgramCache]: Analyzing trace with hash 112793720, now seen corresponding path program 5 times [2021-06-12 20:34:49,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:49,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201125089] [2021-06-12 20:34:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:49,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:49,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201125089] [2021-06-12 20:34:49,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201125089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:49,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693837971] [2021-06-12 20:34:49,948 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 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 [2021-06-12 20:34:49,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:34:49,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:49,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:34:49,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:50,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:50,049 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 [2021-06-12 20:34:50,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:50,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:50,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:50,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:34:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:50,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693837971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:50,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:50,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:34:50,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007284414] [2021-06-12 20:34:50,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:34:50,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:50,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:34:50,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:34:50,121 INFO L87 Difference]: Start difference. First operand 814 states and 3162 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:50,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:50,453 INFO L93 Difference]: Finished difference Result 1332 states and 5142 transitions. [2021-06-12 20:34:50,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:34:50,453 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:34:50,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:50,455 INFO L225 Difference]: With dead ends: 1332 [2021-06-12 20:34:50,455 INFO L226 Difference]: Without dead ends: 1241 [2021-06-12 20:34:50,456 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 221.2ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:34:50,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-06-12 20:34:50,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 832. [2021-06-12 20:34:50,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.931407942238267) internal successors, (3267), 831 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:50,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 3267 transitions. [2021-06-12 20:34:50,475 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 3267 transitions. Word has length 26 [2021-06-12 20:34:50,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:50,475 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 3267 transitions. [2021-06-12 20:34:50,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:50,475 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 3267 transitions. [2021-06-12 20:34:50,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:50,477 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:50,477 INFO L472 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] [2021-06-12 20:34:50,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 20:34:50,697 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:50,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:50,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1004083728, now seen corresponding path program 6 times [2021-06-12 20:34:50,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:50,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771037357] [2021-06-12 20:34:50,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:50,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:50,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771037357] [2021-06-12 20:34:50,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771037357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:50,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105448415] [2021-06-12 20:34:50,827 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 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 [2021-06-12 20:34:50,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:34:50,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:50,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:34:50,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:50,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:50,917 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 [2021-06-12 20:34:50,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:34:50,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:50,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:50,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-06-12 20:34:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:51,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105448415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:51,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:51,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 20:34:51,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988116642] [2021-06-12 20:34:51,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:34:51,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:51,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:34:51,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:34:51,037 INFO L87 Difference]: Start difference. First operand 832 states and 3267 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 20:34:52,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:52,078 INFO L93 Difference]: Finished difference Result 1857 states and 7226 transitions. [2021-06-12 20:34:52,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:34:52,078 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 26 [2021-06-12 20:34:52,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:52,081 INFO L225 Difference]: With dead ends: 1857 [2021-06-12 20:34:52,081 INFO L226 Difference]: Without dead ends: 1694 [2021-06-12 20:34:52,081 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 750.9ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:34:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-06-12 20:34:52,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 856. [2021-06-12 20:34:52,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.9742690058479533) internal successors, (3398), 855 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 3398 transitions. [2021-06-12 20:34:52,102 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 3398 transitions. Word has length 26 [2021-06-12 20:34:52,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:52,102 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 3398 transitions. [2021-06-12 20:34:52,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 20:34:52,103 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 3398 transitions. [2021-06-12 20:34:52,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:52,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:52,105 INFO L472 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] [2021-06-12 20:34:52,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 20:34:52,319 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:52,319 INFO L82 PathProgramCache]: Analyzing trace with hash -317823172, now seen corresponding path program 5 times [2021-06-12 20:34:52,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:52,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951671123] [2021-06-12 20:34:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:52,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:52,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951671123] [2021-06-12 20:34:52,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951671123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:52,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347615510] [2021-06-12 20:34:52,395 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 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 [2021-06-12 20:34:52,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:34:52,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:52,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:34:52,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:52,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:52,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-12 20:34:52,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:52,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:52,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:52,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:34:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:52,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347615510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:52,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:52,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:34:52,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889696362] [2021-06-12 20:34:52,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:34:52,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:52,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:34:52,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:34:52,553 INFO L87 Difference]: Start difference. First operand 856 states and 3398 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:52,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:52,732 INFO L93 Difference]: Finished difference Result 1245 states and 4901 transitions. [2021-06-12 20:34:52,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:34:52,732 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:34:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:52,734 INFO L225 Difference]: With dead ends: 1245 [2021-06-12 20:34:52,734 INFO L226 Difference]: Without dead ends: 1163 [2021-06-12 20:34:52,734 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:34:52,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-06-12 20:34:52,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 865. [2021-06-12 20:34:52,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.9756944444444446) internal successors, (3435), 864 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 3435 transitions. [2021-06-12 20:34:52,749 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 3435 transitions. Word has length 26 [2021-06-12 20:34:52,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:52,749 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 3435 transitions. [2021-06-12 20:34:52,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:52,749 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 3435 transitions. [2021-06-12 20:34:52,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:52,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:52,753 INFO L472 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] [2021-06-12 20:34:52,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 20:34:52,969 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:52,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:52,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1699738576, now seen corresponding path program 6 times [2021-06-12 20:34:52,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:52,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009073931] [2021-06-12 20:34:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:53,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:53,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009073931] [2021-06-12 20:34:53,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009073931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:53,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372133514] [2021-06-12 20:34:53,062 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 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 [2021-06-12 20:34:53,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:34:53,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:53,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:34:53,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:53,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:53,187 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:34:53,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:34:53,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:53,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:53,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-06-12 20:34:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:53,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372133514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:53,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:53,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 20:34:53,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504692576] [2021-06-12 20:34:53,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:34:53,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:53,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:34:53,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:34:53,318 INFO L87 Difference]: Start difference. First operand 865 states and 3435 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 20:34:54,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:54,557 INFO L93 Difference]: Finished difference Result 1646 states and 6434 transitions. [2021-06-12 20:34:54,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:34:54,557 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 26 [2021-06-12 20:34:54,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:54,560 INFO L225 Difference]: With dead ends: 1646 [2021-06-12 20:34:54,560 INFO L226 Difference]: Without dead ends: 1573 [2021-06-12 20:34:54,560 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 905.3ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:34:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2021-06-12 20:34:54,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 856. [2021-06-12 20:34:54,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.9742690058479533) internal successors, (3398), 855 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:54,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 3398 transitions. [2021-06-12 20:34:54,615 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 3398 transitions. Word has length 26 [2021-06-12 20:34:54,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:54,615 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 3398 transitions. [2021-06-12 20:34:54,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 20:34:54,615 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 3398 transitions. [2021-06-12 20:34:54,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:54,617 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:54,617 INFO L472 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] [2021-06-12 20:34:54,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:54,840 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:54,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:54,840 INFO L82 PathProgramCache]: Analyzing trace with hash -248765392, now seen corresponding path program 4 times [2021-06-12 20:34:54,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:54,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610737672] [2021-06-12 20:34:54,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:54,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:54,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610737672] [2021-06-12 20:34:54,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610737672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:54,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843319968] [2021-06-12 20:34:54,913 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 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 [2021-06-12 20:34:54,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:34:54,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:54,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:34:54,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:55,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:55,014 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 [2021-06-12 20:34:55,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:55,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:55,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:55,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-12 20:34:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:55,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843319968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:55,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:55,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:34:55,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884643443] [2021-06-12 20:34:55,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:34:55,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:55,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:34:55,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:34:55,078 INFO L87 Difference]: Start difference. First operand 856 states and 3398 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:55,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:55,309 INFO L93 Difference]: Finished difference Result 1278 states and 4997 transitions. [2021-06-12 20:34:55,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:34:55,309 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:34:55,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:55,311 INFO L225 Difference]: With dead ends: 1278 [2021-06-12 20:34:55,311 INFO L226 Difference]: Without dead ends: 1205 [2021-06-12 20:34:55,311 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:34:55,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-06-12 20:34:55,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 892. [2021-06-12 20:34:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.9551066217732886) internal successors, (3524), 891 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:55,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3524 transitions. [2021-06-12 20:34:55,328 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3524 transitions. Word has length 26 [2021-06-12 20:34:55,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:55,328 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3524 transitions. [2021-06-12 20:34:55,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3524 transitions. [2021-06-12 20:34:55,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:55,330 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:55,330 INFO L472 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] [2021-06-12 20:34:55,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:55,541 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:55,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:55,541 INFO L82 PathProgramCache]: Analyzing trace with hash -959064550, now seen corresponding path program 4 times [2021-06-12 20:34:55,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:55,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890969173] [2021-06-12 20:34:55,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:55,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:55,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890969173] [2021-06-12 20:34:55,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890969173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:55,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743451455] [2021-06-12 20:34:55,619 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 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 [2021-06-12 20:34:55,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:34:55,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:55,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:34:55,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:55,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:55,728 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 [2021-06-12 20:34:55,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:55,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:55,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:55,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-12 20:34:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:55,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743451455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:55,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:55,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:34:55,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357791069] [2021-06-12 20:34:55,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:34:55,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:55,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:34:55,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:34:55,774 INFO L87 Difference]: Start difference. First operand 892 states and 3524 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) 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) [2021-06-12 20:34:56,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:56,060 INFO L93 Difference]: Finished difference Result 1234 states and 4842 transitions. [2021-06-12 20:34:56,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:34:56,061 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) 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 26 [2021-06-12 20:34:56,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:56,064 INFO L225 Difference]: With dead ends: 1234 [2021-06-12 20:34:56,064 INFO L226 Difference]: Without dead ends: 1161 [2021-06-12 20:34:56,064 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 181.8ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:34:56,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-06-12 20:34:56,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 868. [2021-06-12 20:34:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.980392156862745) internal successors, (3451), 867 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:56,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3451 transitions. [2021-06-12 20:34:56,083 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3451 transitions. Word has length 26 [2021-06-12 20:34:56,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:56,083 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3451 transitions. [2021-06-12 20:34:56,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) 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) [2021-06-12 20:34:56,083 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3451 transitions. [2021-06-12 20:34:56,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:56,085 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:56,085 INFO L472 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] [2021-06-12 20:34:56,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-12 20:34:56,308 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:56,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:56,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1223906964, now seen corresponding path program 5 times [2021-06-12 20:34:56,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:56,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199087886] [2021-06-12 20:34:56,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:56,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:56,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199087886] [2021-06-12 20:34:56,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199087886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:56,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625141184] [2021-06-12 20:34:56,380 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 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 [2021-06-12 20:34:56,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:34:56,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:56,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:34:56,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:56,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:56,483 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 [2021-06-12 20:34:56,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:56,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:56,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:56,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:34:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:56,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625141184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:56,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:56,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:34:56,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120402508] [2021-06-12 20:34:56,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:34:56,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:56,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:34:56,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:34:56,544 INFO L87 Difference]: Start difference. First operand 868 states and 3451 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:56,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:56,787 INFO L93 Difference]: Finished difference Result 1243 states and 4884 transitions. [2021-06-12 20:34:56,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:34:56,795 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:34:56,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:56,797 INFO L225 Difference]: With dead ends: 1243 [2021-06-12 20:34:56,797 INFO L226 Difference]: Without dead ends: 1170 [2021-06-12 20:34:56,797 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:34:56,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-06-12 20:34:56,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 877. [2021-06-12 20:34:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.9817351598173514) internal successors, (3488), 876 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:56,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 3488 transitions. [2021-06-12 20:34:56,812 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 3488 transitions. Word has length 26 [2021-06-12 20:34:56,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:56,812 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 3488 transitions. [2021-06-12 20:34:56,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 3488 transitions. [2021-06-12 20:34:56,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:56,814 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:56,814 INFO L472 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] [2021-06-12 20:34:57,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:57,014 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:57,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:57,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1537433360, now seen corresponding path program 6 times [2021-06-12 20:34:57,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:57,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903472519] [2021-06-12 20:34:57,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:57,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:57,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903472519] [2021-06-12 20:34:57,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903472519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:57,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529222711] [2021-06-12 20:34:57,082 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 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 [2021-06-12 20:34:57,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:34:57,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:57,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:34:57,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:57,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:57,196 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 [2021-06-12 20:34:57,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:34:57,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:57,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:57,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:34:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:57,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529222711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:57,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:57,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:34:57,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672402231] [2021-06-12 20:34:57,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:34:57,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:57,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:34:57,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:34:57,333 INFO L87 Difference]: Start difference. First operand 877 states and 3488 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-06-12 20:34:58,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:58,219 INFO L93 Difference]: Finished difference Result 1415 states and 5519 transitions. [2021-06-12 20:34:58,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:34:58,220 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 26 [2021-06-12 20:34:58,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:58,222 INFO L225 Difference]: With dead ends: 1415 [2021-06-12 20:34:58,222 INFO L226 Difference]: Without dead ends: 1332 [2021-06-12 20:34:58,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 587.7ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:34:58,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-06-12 20:34:58,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 868. [2021-06-12 20:34:58,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.980392156862745) internal successors, (3451), 867 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3451 transitions. [2021-06-12 20:34:58,235 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3451 transitions. Word has length 26 [2021-06-12 20:34:58,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:58,236 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3451 transitions. [2021-06-12 20:34:58,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-06-12 20:34:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3451 transitions. [2021-06-12 20:34:58,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:58,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:58,237 INFO L472 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] [2021-06-12 20:34:58,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 20:34:58,438 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:58,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:58,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1898034838, now seen corresponding path program 5 times [2021-06-12 20:34:58,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:58,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123157098] [2021-06-12 20:34:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:58,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:58,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123157098] [2021-06-12 20:34:58,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123157098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:58,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262776246] [2021-06-12 20:34:58,514 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 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 [2021-06-12 20:34:58,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:34:58,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:58,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:34:58,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:58,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:34:58,616 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 [2021-06-12 20:34:58,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:34:58,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:58,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:58,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:34:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:58,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262776246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:58,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:58,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:34:58,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219572202] [2021-06-12 20:34:58,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:34:58,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:58,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:34:58,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:34:58,682 INFO L87 Difference]: Start difference. First operand 868 states and 3451 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) 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) [2021-06-12 20:34:58,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:58,884 INFO L93 Difference]: Finished difference Result 1197 states and 4721 transitions. [2021-06-12 20:34:58,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:34:58,887 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) 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 26 [2021-06-12 20:34:58,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:58,889 INFO L225 Difference]: With dead ends: 1197 [2021-06-12 20:34:58,889 INFO L226 Difference]: Without dead ends: 1124 [2021-06-12 20:34:58,890 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 170.8ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:34:58,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-06-12 20:34:58,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 877. [2021-06-12 20:34:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.982876712328767) internal successors, (3489), 876 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 3489 transitions. [2021-06-12 20:34:58,905 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 3489 transitions. Word has length 26 [2021-06-12 20:34:58,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:58,905 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 3489 transitions. [2021-06-12 20:34:58,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) 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) [2021-06-12 20:34:58,905 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 3489 transitions. [2021-06-12 20:34:58,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:34:58,907 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:58,907 INFO L472 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] [2021-06-12 20:34:59,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-12 20:34:59,108 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:59,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:59,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1725832690, now seen corresponding path program 6 times [2021-06-12 20:34:59,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:59,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023590886] [2021-06-12 20:34:59,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:59,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:59,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023590886] [2021-06-12 20:34:59,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023590886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:59,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973475858] [2021-06-12 20:34:59,180 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 [2021-06-12 20:34:59,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:34:59,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:59,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:34:59,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:59,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:59,274 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 [2021-06-12 20:34:59,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:34:59,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:34:59,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:34:59,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:34:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:59,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973475858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:59,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:59,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:34:59,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198836626] [2021-06-12 20:34:59,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:34:59,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:59,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:34:59,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:34:59,420 INFO L87 Difference]: Start difference. First operand 877 states and 3489 transitions. Second operand has 15 states, 15 states have (on average 3.0) 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) [2021-06-12 20:35:00,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:00,206 INFO L93 Difference]: Finished difference Result 1349 states and 5259 transitions. [2021-06-12 20:35:00,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:35:00,206 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) 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 26 [2021-06-12 20:35:00,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:00,208 INFO L225 Difference]: With dead ends: 1349 [2021-06-12 20:35:00,209 INFO L226 Difference]: Without dead ends: 1274 [2021-06-12 20:35:00,209 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 580.8ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:35:00,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-06-12 20:35:00,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 868. [2021-06-12 20:35:00,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.980392156862745) internal successors, (3451), 867 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3451 transitions. [2021-06-12 20:35:00,230 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3451 transitions. Word has length 26 [2021-06-12 20:35:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:00,230 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3451 transitions. [2021-06-12 20:35:00,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) 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) [2021-06-12 20:35:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3451 transitions. [2021-06-12 20:35:00,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:00,232 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:00,232 INFO L472 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] [2021-06-12 20:35:00,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 20:35:00,453 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:00,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1901898462, now seen corresponding path program 7 times [2021-06-12 20:35:00,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:00,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608628427] [2021-06-12 20:35:00,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:00,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:00,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608628427] [2021-06-12 20:35:00,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608628427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:00,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678450422] [2021-06-12 20:35:00,536 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 [2021-06-12 20:35:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:00,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:00,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:00,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:00,701 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 20:35:00,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:00,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:00,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:00,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:35:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:00,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678450422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:00,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:00,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:35:00,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030211443] [2021-06-12 20:35:00,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:00,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:00,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:00,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:00,776 INFO L87 Difference]: Start difference. First operand 868 states and 3451 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:01,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:01,054 INFO L93 Difference]: Finished difference Result 1481 states and 5795 transitions. [2021-06-12 20:35:01,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:35:01,054 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:35:01,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:01,057 INFO L225 Difference]: With dead ends: 1481 [2021-06-12 20:35:01,057 INFO L226 Difference]: Without dead ends: 1400 [2021-06-12 20:35:01,058 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:35:01,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-06-12 20:35:01,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 910. [2021-06-12 20:35:01,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.957095709570957) internal successors, (3597), 909 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:01,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3597 transitions. [2021-06-12 20:35:01,077 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3597 transitions. Word has length 26 [2021-06-12 20:35:01,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:01,077 INFO L482 AbstractCegarLoop]: Abstraction has 910 states and 3597 transitions. [2021-06-12 20:35:01,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:01,077 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3597 transitions. [2021-06-12 20:35:01,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:01,079 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:01,079 INFO L472 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] [2021-06-12 20:35:01,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:01,279 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:01,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:01,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1088329440, now seen corresponding path program 7 times [2021-06-12 20:35:01,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:01,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441291842] [2021-06-12 20:35:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:01,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:01,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441291842] [2021-06-12 20:35:01,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441291842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:01,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813777612] [2021-06-12 20:35:01,387 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 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 [2021-06-12 20:35:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:01,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:01,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:01,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:01,550 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 [2021-06-12 20:35:01,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:01,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:01,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:35:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:01,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813777612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:01,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:01,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:35:01,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134679511] [2021-06-12 20:35:01,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:01,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:01,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:01,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:01,595 INFO L87 Difference]: Start difference. First operand 910 states and 3597 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:35:02,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:02,017 INFO L93 Difference]: Finished difference Result 1431 states and 5615 transitions. [2021-06-12 20:35:02,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:35:02,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 26 [2021-06-12 20:35:02,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:02,020 INFO L225 Difference]: With dead ends: 1431 [2021-06-12 20:35:02,020 INFO L226 Difference]: Without dead ends: 1350 [2021-06-12 20:35:02,020 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 260.1ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:35:02,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-12 20:35:02,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 880. [2021-06-12 20:35:02,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.973833902161547) internal successors, (3493), 879 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:02,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3493 transitions. [2021-06-12 20:35:02,034 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3493 transitions. Word has length 26 [2021-06-12 20:35:02,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:02,034 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3493 transitions. [2021-06-12 20:35:02,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:35:02,034 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3493 transitions. [2021-06-12 20:35:02,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:02,035 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:02,036 INFO L472 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] [2021-06-12 20:35:02,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:02,236 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:02,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:02,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1950247962, now seen corresponding path program 8 times [2021-06-12 20:35:02,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:02,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103698018] [2021-06-12 20:35:02,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:02,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:02,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103698018] [2021-06-12 20:35:02,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103698018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:02,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131840214] [2021-06-12 20:35:02,362 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 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 [2021-06-12 20:35:02,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:02,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:02,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:35:02,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:02,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:02,461 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 [2021-06-12 20:35:02,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:02,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:02,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:02,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:35:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:02,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131840214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:02,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:02,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 20:35:02,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430531604] [2021-06-12 20:35:02,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:35:02,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:02,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:35:02,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:35:02,598 INFO L87 Difference]: Start difference. First operand 880 states and 3493 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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) [2021-06-12 20:35:03,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:03,888 INFO L93 Difference]: Finished difference Result 2510 states and 9509 transitions. [2021-06-12 20:35:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:35:03,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 26 [2021-06-12 20:35:03,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:03,893 INFO L225 Difference]: With dead ends: 2510 [2021-06-12 20:35:03,893 INFO L226 Difference]: Without dead ends: 2237 [2021-06-12 20:35:03,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1010.5ms TimeCoverageRelationStatistics Valid=363, Invalid=1529, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:35:03,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-06-12 20:35:03,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 886. [2021-06-12 20:35:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.977401129943503) internal successors, (3520), 885 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:03,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3520 transitions. [2021-06-12 20:35:03,912 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3520 transitions. Word has length 26 [2021-06-12 20:35:03,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:03,912 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3520 transitions. [2021-06-12 20:35:03,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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) [2021-06-12 20:35:03,912 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3520 transitions. [2021-06-12 20:35:03,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:03,914 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:03,914 INFO L472 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] [2021-06-12 20:35:04,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:04,114 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:04,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:04,115 INFO L82 PathProgramCache]: Analyzing trace with hash -397476018, now seen corresponding path program 9 times [2021-06-12 20:35:04,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:04,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120997834] [2021-06-12 20:35:04,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:04,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:04,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120997834] [2021-06-12 20:35:04,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120997834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:04,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588762812] [2021-06-12 20:35:04,231 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 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 [2021-06-12 20:35:04,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:35:04,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:04,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:35:04,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:04,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:04,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-12 20:35:04,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:04,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:04,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:04,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:35:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:04,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588762812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:04,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:04,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 20:35:04,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237456656] [2021-06-12 20:35:04,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:35:04,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:04,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:35:04,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:35:04,497 INFO L87 Difference]: Start difference. First operand 886 states and 3520 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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) [2021-06-12 20:35:05,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:05,813 INFO L93 Difference]: Finished difference Result 2599 states and 9825 transitions. [2021-06-12 20:35:05,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:35:05,814 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 26 [2021-06-12 20:35:05,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:05,817 INFO L225 Difference]: With dead ends: 2599 [2021-06-12 20:35:05,818 INFO L226 Difference]: Without dead ends: 2327 [2021-06-12 20:35:05,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1020.9ms TimeCoverageRelationStatistics Valid=394, Invalid=1676, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:35:05,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2021-06-12 20:35:05,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 880. [2021-06-12 20:35:05,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.973833902161547) internal successors, (3493), 879 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3493 transitions. [2021-06-12 20:35:05,836 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3493 transitions. Word has length 26 [2021-06-12 20:35:05,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:05,836 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3493 transitions. [2021-06-12 20:35:05,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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) [2021-06-12 20:35:05,837 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3493 transitions. [2021-06-12 20:35:05,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:05,838 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:05,838 INFO L472 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] [2021-06-12 20:35:06,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:06,039 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:06,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:06,039 INFO L82 PathProgramCache]: Analyzing trace with hash 178229480, now seen corresponding path program 8 times [2021-06-12 20:35:06,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:06,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197547681] [2021-06-12 20:35:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:06,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:06,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197547681] [2021-06-12 20:35:06,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197547681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:06,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395034484] [2021-06-12 20:35:06,118 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 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 [2021-06-12 20:35:06,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:06,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:06,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:35:06,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:06,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:06,233 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 [2021-06-12 20:35:06,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:06,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:06,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:06,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:35:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:06,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395034484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:06,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:06,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:35:06,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881413337] [2021-06-12 20:35:06,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:35:06,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:06,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:35:06,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:35:06,403 INFO L87 Difference]: Start difference. First operand 880 states and 3493 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:07,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:07,584 INFO L93 Difference]: Finished difference Result 1683 states and 6604 transitions. [2021-06-12 20:35:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:35:07,585 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:35:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:07,588 INFO L225 Difference]: With dead ends: 1683 [2021-06-12 20:35:07,588 INFO L226 Difference]: Without dead ends: 1610 [2021-06-12 20:35:07,589 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 844.9ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:35:07,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-06-12 20:35:07,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 889. [2021-06-12 20:35:07,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.975225225225225) internal successors, (3530), 888 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:07,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3530 transitions. [2021-06-12 20:35:07,604 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3530 transitions. Word has length 26 [2021-06-12 20:35:07,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:07,604 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3530 transitions. [2021-06-12 20:35:07,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:07,604 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3530 transitions. [2021-06-12 20:35:07,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:07,606 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:07,606 INFO L472 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] [2021-06-12 20:35:07,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-12 20:35:07,807 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:07,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:07,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1217357596, now seen corresponding path program 9 times [2021-06-12 20:35:07,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:07,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049682145] [2021-06-12 20:35:07,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:07,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:07,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049682145] [2021-06-12 20:35:07,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049682145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:07,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034002577] [2021-06-12 20:35:07,896 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 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 [2021-06-12 20:35:07,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:35:07,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:07,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:35:07,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:08,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:08,012 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 [2021-06-12 20:35:08,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:08,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:08,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:08,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:35:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:08,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034002577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:08,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:08,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:35:08,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298998435] [2021-06-12 20:35:08,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:35:08,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:08,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:35:08,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:35:08,152 INFO L87 Difference]: Start difference. First operand 889 states and 3530 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:09,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:09,302 INFO L93 Difference]: Finished difference Result 1683 states and 6635 transitions. [2021-06-12 20:35:09,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:35:09,303 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:35:09,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:09,307 INFO L225 Difference]: With dead ends: 1683 [2021-06-12 20:35:09,307 INFO L226 Difference]: Without dead ends: 1600 [2021-06-12 20:35:09,307 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 850.3ms TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:35:09,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-06-12 20:35:09,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 871. [2021-06-12 20:35:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.9770114942528734) internal successors, (3460), 870 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:09,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 3460 transitions. [2021-06-12 20:35:09,323 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 3460 transitions. Word has length 26 [2021-06-12 20:35:09,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:09,323 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 3460 transitions. [2021-06-12 20:35:09,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:09,323 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 3460 transitions. [2021-06-12 20:35:09,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:09,325 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:09,325 INFO L472 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] [2021-06-12 20:35:09,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-12 20:35:09,525 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:09,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:09,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2024916790, now seen corresponding path program 10 times [2021-06-12 20:35:09,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:09,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101293451] [2021-06-12 20:35:09,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:09,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:09,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101293451] [2021-06-12 20:35:09,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101293451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:09,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731002483] [2021-06-12 20:35:09,599 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 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 [2021-06-12 20:35:09,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:35:09,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:09,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:09,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:09,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:09,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-12 20:35:09,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:09,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:09,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:09,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:35:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:09,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731002483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:09,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:09,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:35:09,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371803120] [2021-06-12 20:35:09,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:09,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:09,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:09,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:09,809 INFO L87 Difference]: Start difference. First operand 871 states and 3460 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:10,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:10,282 INFO L93 Difference]: Finished difference Result 2026 states and 7973 transitions. [2021-06-12 20:35:10,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:35:10,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:35:10,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:10,286 INFO L225 Difference]: With dead ends: 2026 [2021-06-12 20:35:10,286 INFO L226 Difference]: Without dead ends: 1945 [2021-06-12 20:35:10,287 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 246.8ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:35:10,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-06-12 20:35:10,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 911. [2021-06-12 20:35:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 3.9472527472527474) internal successors, (3592), 910 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 3592 transitions. [2021-06-12 20:35:10,304 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 3592 transitions. Word has length 26 [2021-06-12 20:35:10,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:10,304 INFO L482 AbstractCegarLoop]: Abstraction has 911 states and 3592 transitions. [2021-06-12 20:35:10,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 3592 transitions. [2021-06-12 20:35:10,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:10,306 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:10,306 INFO L472 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] [2021-06-12 20:35:10,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:10,506 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:10,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:10,507 INFO L82 PathProgramCache]: Analyzing trace with hash -965311112, now seen corresponding path program 10 times [2021-06-12 20:35:10,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:10,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534751055] [2021-06-12 20:35:10,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:10,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:10,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534751055] [2021-06-12 20:35:10,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534751055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:10,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351575333] [2021-06-12 20:35:10,604 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 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 [2021-06-12 20:35:10,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:35:10,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:10,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:10,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:10,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:10,799 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 [2021-06-12 20:35:10,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:10,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:10,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:10,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:35:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:10,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351575333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:10,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:10,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:35:10,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664554347] [2021-06-12 20:35:10,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:10,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:10,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:10,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:10,848 INFO L87 Difference]: Start difference. First operand 911 states and 3592 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:35:11,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:11,310 INFO L93 Difference]: Finished difference Result 1975 states and 7789 transitions. [2021-06-12 20:35:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:35:11,310 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 26 [2021-06-12 20:35:11,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:11,314 INFO L225 Difference]: With dead ends: 1975 [2021-06-12 20:35:11,314 INFO L226 Difference]: Without dead ends: 1894 [2021-06-12 20:35:11,314 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 287.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:35:11,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-06-12 20:35:11,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 881. [2021-06-12 20:35:11,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 3.963636363636364) internal successors, (3488), 880 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:11,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 3488 transitions. [2021-06-12 20:35:11,331 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 3488 transitions. Word has length 26 [2021-06-12 20:35:11,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:11,331 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 3488 transitions. [2021-06-12 20:35:11,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:35:11,331 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 3488 transitions. [2021-06-12 20:35:11,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:11,333 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:11,333 INFO L472 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] [2021-06-12 20:35:11,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:11,533 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:11,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:11,534 INFO L82 PathProgramCache]: Analyzing trace with hash -406560492, now seen corresponding path program 7 times [2021-06-12 20:35:11,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:11,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950364376] [2021-06-12 20:35:11,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:11,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:11,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950364376] [2021-06-12 20:35:11,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950364376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:11,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952839152] [2021-06-12 20:35:11,598 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 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 [2021-06-12 20:35:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:11,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:11,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:11,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:11,704 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 [2021-06-12 20:35:11,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:11,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:11,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:11,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:35:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:11,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952839152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:11,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:11,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:35:11,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347156165] [2021-06-12 20:35:11,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:11,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:11,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:11,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:11,770 INFO L87 Difference]: Start difference. First operand 881 states and 3488 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:12,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:12,107 INFO L93 Difference]: Finished difference Result 1399 states and 5520 transitions. [2021-06-12 20:35:12,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:35:12,107 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:35:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:12,109 INFO L225 Difference]: With dead ends: 1399 [2021-06-12 20:35:12,109 INFO L226 Difference]: Without dead ends: 1317 [2021-06-12 20:35:12,109 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 202.3ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:35:12,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-06-12 20:35:12,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 902. [2021-06-12 20:35:12,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.9633740288568258) internal successors, (3571), 901 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:12,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3571 transitions. [2021-06-12 20:35:12,123 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3571 transitions. Word has length 26 [2021-06-12 20:35:12,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:12,123 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3571 transitions. [2021-06-12 20:35:12,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:12,123 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3571 transitions. [2021-06-12 20:35:12,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:12,124 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:12,124 INFO L472 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] [2021-06-12 20:35:12,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:12,326 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:12,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:12,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1126993960, now seen corresponding path program 8 times [2021-06-12 20:35:12,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:12,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104006026] [2021-06-12 20:35:12,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:12,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:12,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104006026] [2021-06-12 20:35:12,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104006026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:12,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358646753] [2021-06-12 20:35:12,394 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 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 [2021-06-12 20:35:12,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:12,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:12,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:12,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:12,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:12,514 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 [2021-06-12 20:35:12,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:12,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:12,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:12,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-12 20:35:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:12,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358646753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:12,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:12,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 20:35:12,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98985634] [2021-06-12 20:35:12,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:12,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:12,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:12,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:12,649 INFO L87 Difference]: Start difference. First operand 902 states and 3571 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:35:13,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:13,350 INFO L93 Difference]: Finished difference Result 1442 states and 5673 transitions. [2021-06-12 20:35:13,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:35:13,350 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 26 [2021-06-12 20:35:13,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:13,353 INFO L225 Difference]: With dead ends: 1442 [2021-06-12 20:35:13,353 INFO L226 Difference]: Without dead ends: 1369 [2021-06-12 20:35:13,353 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 550.3ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:35:13,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-12 20:35:13,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 893. [2021-06-12 20:35:13,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.9618834080717487) internal successors, (3534), 892 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3534 transitions. [2021-06-12 20:35:13,372 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3534 transitions. Word has length 26 [2021-06-12 20:35:13,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:13,372 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3534 transitions. [2021-06-12 20:35:13,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:35:13,372 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3534 transitions. [2021-06-12 20:35:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:13,374 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:13,374 INFO L472 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] [2021-06-12 20:35:13,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-12 20:35:13,589 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:13,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:13,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1969868314, now seen corresponding path program 9 times [2021-06-12 20:35:13,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:13,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175009086] [2021-06-12 20:35:13,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:13,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:13,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175009086] [2021-06-12 20:35:13,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175009086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:13,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493074920] [2021-06-12 20:35:13,684 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 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 [2021-06-12 20:35:13,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:35:13,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:13,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:13,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:13,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:13,849 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 [2021-06-12 20:35:13,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:13,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:13,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:13,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:35:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:13,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493074920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:13,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:13,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:35:13,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835550915] [2021-06-12 20:35:13,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:13,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:13,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:13,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:13,897 INFO L87 Difference]: Start difference. First operand 893 states and 3534 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:14,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:14,259 INFO L93 Difference]: Finished difference Result 1409 states and 5525 transitions. [2021-06-12 20:35:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:35:14,260 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:35:14,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:14,262 INFO L225 Difference]: With dead ends: 1409 [2021-06-12 20:35:14,262 INFO L226 Difference]: Without dead ends: 1338 [2021-06-12 20:35:14,262 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 209.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:35:14,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-06-12 20:35:14,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 917. [2021-06-12 20:35:14,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 3.947598253275109) internal successors, (3616), 916 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 3616 transitions. [2021-06-12 20:35:14,275 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 3616 transitions. Word has length 26 [2021-06-12 20:35:14,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:14,275 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 3616 transitions. [2021-06-12 20:35:14,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:14,276 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 3616 transitions. [2021-06-12 20:35:14,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:14,277 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:14,277 INFO L472 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] [2021-06-12 20:35:14,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-12 20:35:14,478 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:14,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:14,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1020359588, now seen corresponding path program 7 times [2021-06-12 20:35:14,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:14,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264342181] [2021-06-12 20:35:14,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:14,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:14,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264342181] [2021-06-12 20:35:14,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264342181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:14,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117872478] [2021-06-12 20:35:14,557 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 [2021-06-12 20:35:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:14,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:14,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:14,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:14,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-12 20:35:14,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:14,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:14,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:14,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:35:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:14,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117872478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:14,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:14,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:35:14,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760649995] [2021-06-12 20:35:14,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:14,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:14,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:14,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:14,785 INFO L87 Difference]: Start difference. First operand 917 states and 3616 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:35:15,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:15,111 INFO L93 Difference]: Finished difference Result 1368 states and 5378 transitions. [2021-06-12 20:35:15,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:35:15,112 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 26 [2021-06-12 20:35:15,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:15,114 INFO L225 Difference]: With dead ends: 1368 [2021-06-12 20:35:15,114 INFO L226 Difference]: Without dead ends: 1297 [2021-06-12 20:35:15,114 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:35:15,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-06-12 20:35:15,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 893. [2021-06-12 20:35:15,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.9618834080717487) internal successors, (3534), 892 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3534 transitions. [2021-06-12 20:35:15,127 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3534 transitions. Word has length 26 [2021-06-12 20:35:15,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:15,127 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3534 transitions. [2021-06-12 20:35:15,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:35:15,127 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3534 transitions. [2021-06-12 20:35:15,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:15,129 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:15,129 INFO L472 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] [2021-06-12 20:35:15,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-12 20:35:15,329 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:15,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:15,329 INFO L82 PathProgramCache]: Analyzing trace with hash -203283562, now seen corresponding path program 8 times [2021-06-12 20:35:15,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:15,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653010737] [2021-06-12 20:35:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:15,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:15,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653010737] [2021-06-12 20:35:15,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653010737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:15,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509722271] [2021-06-12 20:35:15,394 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 [2021-06-12 20:35:15,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:15,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:15,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:15,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:15,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:15,518 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 [2021-06-12 20:35:15,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:15,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:15,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:15,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:35:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:15,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509722271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:15,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:15,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:35:15,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301699803] [2021-06-12 20:35:15,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:15,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:15,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:15,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:15,582 INFO L87 Difference]: Start difference. First operand 893 states and 3534 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) 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) [2021-06-12 20:35:16,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:16,031 INFO L93 Difference]: Finished difference Result 1337 states and 5270 transitions. [2021-06-12 20:35:16,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:35:16,031 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) 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 26 [2021-06-12 20:35:16,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:16,034 INFO L225 Difference]: With dead ends: 1337 [2021-06-12 20:35:16,034 INFO L226 Difference]: Without dead ends: 1264 [2021-06-12 20:35:16,034 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:35:16,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-06-12 20:35:16,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 902. [2021-06-12 20:35:16,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.9644839067702553) internal successors, (3572), 901 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3572 transitions. [2021-06-12 20:35:16,048 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3572 transitions. Word has length 26 [2021-06-12 20:35:16,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:16,048 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3572 transitions. [2021-06-12 20:35:16,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) 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) [2021-06-12 20:35:16,048 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3572 transitions. [2021-06-12 20:35:16,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:16,050 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:16,050 INFO L472 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] [2021-06-12 20:35:16,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:16,255 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:16,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:16,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1606870386, now seen corresponding path program 9 times [2021-06-12 20:35:16,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:16,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390742001] [2021-06-12 20:35:16,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:16,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:16,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390742001] [2021-06-12 20:35:16,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390742001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:16,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894903083] [2021-06-12 20:35:16,328 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 [2021-06-12 20:35:16,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:35:16,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:16,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:16,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:16,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:16,450 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 [2021-06-12 20:35:16,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:16,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:16,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:16,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:35:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:16,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894903083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:16,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:16,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:35:16,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320954394] [2021-06-12 20:35:16,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:16,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:16,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:16,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:16,507 INFO L87 Difference]: Start difference. First operand 902 states and 3572 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:16,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:16,809 INFO L93 Difference]: Finished difference Result 1333 states and 5253 transitions. [2021-06-12 20:35:16,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:35:16,809 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:35:16,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:16,812 INFO L225 Difference]: With dead ends: 1333 [2021-06-12 20:35:16,812 INFO L226 Difference]: Without dead ends: 1258 [2021-06-12 20:35:16,812 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:35:16,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-06-12 20:35:16,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 884. [2021-06-12 20:35:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.9614949037372593) internal successors, (3498), 883 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3498 transitions. [2021-06-12 20:35:16,830 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3498 transitions. Word has length 26 [2021-06-12 20:35:16,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:16,830 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3498 transitions. [2021-06-12 20:35:16,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:16,830 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3498 transitions. [2021-06-12 20:35:16,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:16,832 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:16,832 INFO L472 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] [2021-06-12 20:35:17,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:17,049 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:17,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:17,049 INFO L82 PathProgramCache]: Analyzing trace with hash -131055850, now seen corresponding path program 10 times [2021-06-12 20:35:17,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:17,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335713917] [2021-06-12 20:35:17,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:17,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:17,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335713917] [2021-06-12 20:35:17,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335713917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:17,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904942944] [2021-06-12 20:35:17,128 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 [2021-06-12 20:35:17,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:35:17,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:17,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:17,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:17,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:17,274 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 [2021-06-12 20:35:17,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:17,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:17,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:17,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:35:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:17,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904942944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:17,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:17,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:35:17,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110320780] [2021-06-12 20:35:17,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:17,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:17,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:17,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:17,330 INFO L87 Difference]: Start difference. First operand 884 states and 3498 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:17,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:17,792 INFO L93 Difference]: Finished difference Result 1770 states and 6860 transitions. [2021-06-12 20:35:17,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:35:17,793 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:35:17,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:17,796 INFO L225 Difference]: With dead ends: 1770 [2021-06-12 20:35:17,796 INFO L226 Difference]: Without dead ends: 1699 [2021-06-12 20:35:17,796 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 230.8ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:35:17,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-06-12 20:35:17,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 916. [2021-06-12 20:35:17,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.9366120218579237) internal successors, (3602), 915 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:17,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3602 transitions. [2021-06-12 20:35:17,812 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3602 transitions. Word has length 26 [2021-06-12 20:35:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:17,812 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 3602 transitions. [2021-06-12 20:35:17,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:17,813 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3602 transitions. [2021-06-12 20:35:17,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:17,814 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:17,814 INFO L472 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] [2021-06-12 20:35:18,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:18,017 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:18,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:18,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1173683544, now seen corresponding path program 10 times [2021-06-12 20:35:18,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:18,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844402093] [2021-06-12 20:35:18,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:18,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:18,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844402093] [2021-06-12 20:35:18,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844402093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:18,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211843617] [2021-06-12 20:35:18,092 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 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 [2021-06-12 20:35:18,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:35:18,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:18,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:18,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:18,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:18,281 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 [2021-06-12 20:35:18,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:18,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:18,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:18,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:35:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:18,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211843617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:18,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:18,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:35:18,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417066944] [2021-06-12 20:35:18,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:18,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:18,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:18,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:18,330 INFO L87 Difference]: Start difference. First operand 916 states and 3602 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:35:18,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:18,823 INFO L93 Difference]: Finished difference Result 1728 states and 6709 transitions. [2021-06-12 20:35:18,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:35:18,823 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 26 [2021-06-12 20:35:18,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:18,826 INFO L225 Difference]: With dead ends: 1728 [2021-06-12 20:35:18,826 INFO L226 Difference]: Without dead ends: 1657 [2021-06-12 20:35:18,826 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 240.6ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:35:18,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-06-12 20:35:18,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 884. [2021-06-12 20:35:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.9614949037372593) internal successors, (3498), 883 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3498 transitions. [2021-06-12 20:35:18,843 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3498 transitions. Word has length 26 [2021-06-12 20:35:18,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:18,843 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3498 transitions. [2021-06-12 20:35:18,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:35:18,843 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3498 transitions. [2021-06-12 20:35:18,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:18,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:18,845 INFO L472 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] [2021-06-12 20:35:19,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:19,045 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:19,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:19,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1946545164, now seen corresponding path program 11 times [2021-06-12 20:35:19,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:19,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394840211] [2021-06-12 20:35:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:19,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:19,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394840211] [2021-06-12 20:35:19,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394840211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:19,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646541973] [2021-06-12 20:35:19,129 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 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 [2021-06-12 20:35:19,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:19,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:19,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:19,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:19,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:19,236 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 [2021-06-12 20:35:19,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:19,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:19,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:19,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-12 20:35:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:19,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646541973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:19,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:19,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:35:19,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417597957] [2021-06-12 20:35:19,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:19,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:19,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:19,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:19,277 INFO L87 Difference]: Start difference. First operand 884 states and 3498 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 20:35:19,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:19,510 INFO L93 Difference]: Finished difference Result 1395 states and 5445 transitions. [2021-06-12 20:35:19,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:35:19,510 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 26 [2021-06-12 20:35:19,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:19,512 INFO L225 Difference]: With dead ends: 1395 [2021-06-12 20:35:19,513 INFO L226 Difference]: Without dead ends: 1314 [2021-06-12 20:35:19,513 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:35:19,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-06-12 20:35:19,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 923. [2021-06-12 20:35:19,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 3.9425162689804774) internal successors, (3635), 922 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:19,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 3635 transitions. [2021-06-12 20:35:19,526 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 3635 transitions. Word has length 26 [2021-06-12 20:35:19,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:19,526 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 3635 transitions. [2021-06-12 20:35:19,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 20:35:19,526 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 3635 transitions. [2021-06-12 20:35:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:19,547 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:19,547 INFO L472 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] [2021-06-12 20:35:19,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-12 20:35:19,747 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:19,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:19,748 INFO L82 PathProgramCache]: Analyzing trace with hash -641805770, now seen corresponding path program 11 times [2021-06-12 20:35:19,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:19,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062022920] [2021-06-12 20:35:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:19,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:19,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062022920] [2021-06-12 20:35:19,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062022920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:19,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657936196] [2021-06-12 20:35:19,841 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 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 [2021-06-12 20:35:19,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:19,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:19,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:19,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:19,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:19,951 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:35:19,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:19,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:19,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:19,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-12 20:35:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:19,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657936196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:19,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:19,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:35:19,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383265673] [2021-06-12 20:35:19,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:19,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:19,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:19,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:19,991 INFO L87 Difference]: Start difference. First operand 923 states and 3635 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-12 20:35:20,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:20,224 INFO L93 Difference]: Finished difference Result 1351 states and 5290 transitions. [2021-06-12 20:35:20,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:35:20,225 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 26 [2021-06-12 20:35:20,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:20,227 INFO L225 Difference]: With dead ends: 1351 [2021-06-12 20:35:20,227 INFO L226 Difference]: Without dead ends: 1270 [2021-06-12 20:35:20,227 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:35:20,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2021-06-12 20:35:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 893. [2021-06-12 20:35:20,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.958520179372197) internal successors, (3531), 892 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:20,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3531 transitions. [2021-06-12 20:35:20,240 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3531 transitions. Word has length 26 [2021-06-12 20:35:20,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:20,240 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3531 transitions. [2021-06-12 20:35:20,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-12 20:35:20,240 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3531 transitions. [2021-06-12 20:35:20,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:20,241 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:20,242 INFO L472 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] [2021-06-12 20:35:20,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:20,442 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:20,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:20,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1503724292, now seen corresponding path program 12 times [2021-06-12 20:35:20,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:20,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421375061] [2021-06-12 20:35:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:35:20,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:20,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421375061] [2021-06-12 20:35:20,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421375061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:20,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967889013] [2021-06-12 20:35:20,541 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 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 [2021-06-12 20:35:20,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:35:20,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:20,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:35:20,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:20,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:20,653 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 [2021-06-12 20:35:20,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:20,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:20,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:20,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:35:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:20,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967889013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:20,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:20,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:35:20,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314284523] [2021-06-12 20:35:20,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:35:20,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:20,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:35:20,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:35:20,772 INFO L87 Difference]: Start difference. First operand 893 states and 3531 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2021-06-12 20:35:21,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:21,634 INFO L93 Difference]: Finished difference Result 2174 states and 8231 transitions. [2021-06-12 20:35:21,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:35:21,634 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 26 [2021-06-12 20:35:21,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:21,637 INFO L225 Difference]: With dead ends: 2174 [2021-06-12 20:35:21,637 INFO L226 Difference]: Without dead ends: 1901 [2021-06-12 20:35:21,637 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 648.3ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:35:21,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2021-06-12 20:35:21,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 899. [2021-06-12 20:35:21,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.9621380846325165) internal successors, (3558), 898 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:21,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3558 transitions. [2021-06-12 20:35:21,653 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3558 transitions. Word has length 26 [2021-06-12 20:35:21,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:21,653 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 3558 transitions. [2021-06-12 20:35:21,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2021-06-12 20:35:21,653 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3558 transitions. [2021-06-12 20:35:21,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:21,654 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:21,655 INFO L472 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] [2021-06-12 20:35:21,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-12 20:35:21,855 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:21,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:21,855 INFO L82 PathProgramCache]: Analyzing trace with hash 49047652, now seen corresponding path program 13 times [2021-06-12 20:35:21,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:21,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404436265] [2021-06-12 20:35:21,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:35:21,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:21,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404436265] [2021-06-12 20:35:21,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404436265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:21,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763130177] [2021-06-12 20:35:21,948 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 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 [2021-06-12 20:35:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:21,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:21,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:22,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:22,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-12 20:35:22,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:22,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:22,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:22,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:35:22,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:22,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763130177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:22,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:22,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:35:22,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78563596] [2021-06-12 20:35:22,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:22,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:22,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:22,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:22,100 INFO L87 Difference]: Start difference. First operand 899 states and 3558 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-12 20:35:22,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:22,390 INFO L93 Difference]: Finished difference Result 1423 states and 5561 transitions. [2021-06-12 20:35:22,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:35:22,390 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 26 [2021-06-12 20:35:22,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:22,393 INFO L225 Difference]: With dead ends: 1423 [2021-06-12 20:35:22,393 INFO L226 Difference]: Without dead ends: 1333 [2021-06-12 20:35:22,393 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:35:22,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2021-06-12 20:35:22,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 899. [2021-06-12 20:35:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.961024498886414) internal successors, (3557), 898 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:22,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3557 transitions. [2021-06-12 20:35:22,407 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3557 transitions. Word has length 26 [2021-06-12 20:35:22,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:22,407 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 3557 transitions. [2021-06-12 20:35:22,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-12 20:35:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3557 transitions. [2021-06-12 20:35:22,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:22,409 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:22,409 INFO L472 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] [2021-06-12 20:35:22,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:22,629 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:22,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:22,629 INFO L82 PathProgramCache]: Analyzing trace with hash 624753150, now seen corresponding path program 12 times [2021-06-12 20:35:22,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:22,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057255612] [2021-06-12 20:35:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:22,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:22,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057255612] [2021-06-12 20:35:22,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057255612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:22,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407593978] [2021-06-12 20:35:22,703 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 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 [2021-06-12 20:35:22,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:35:22,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:22,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:35:22,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:22,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:22,823 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 [2021-06-12 20:35:22,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:22,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:22,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:22,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:35:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:22,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407593978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:22,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:22,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:35:22,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959578067] [2021-06-12 20:35:22,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:35:22,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:22,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:35:22,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:35:22,985 INFO L87 Difference]: Start difference. First operand 899 states and 3557 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:25,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:25,070 INFO L93 Difference]: Finished difference Result 2044 states and 7778 transitions. [2021-06-12 20:35:25,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 20:35:25,070 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:35:25,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:25,074 INFO L225 Difference]: With dead ends: 2044 [2021-06-12 20:35:25,074 INFO L226 Difference]: Without dead ends: 1885 [2021-06-12 20:35:25,074 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1588.4ms TimeCoverageRelationStatistics Valid=641, Invalid=2551, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:35:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2021-06-12 20:35:25,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 928. [2021-06-12 20:35:25,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.9525350593311757) internal successors, (3664), 927 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3664 transitions. [2021-06-12 20:35:25,096 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3664 transitions. Word has length 26 [2021-06-12 20:35:25,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:25,096 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3664 transitions. [2021-06-12 20:35:25,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:25,096 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3664 transitions. [2021-06-12 20:35:25,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:25,098 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:25,098 INFO L472 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] [2021-06-12 20:35:25,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-12 20:35:25,321 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash -770833926, now seen corresponding path program 13 times [2021-06-12 20:35:25,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:25,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26316980] [2021-06-12 20:35:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:25,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:25,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26316980] [2021-06-12 20:35:25,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26316980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:25,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13948103] [2021-06-12 20:35:25,389 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 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 [2021-06-12 20:35:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:25,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:25,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:25,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:25,473 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 [2021-06-12 20:35:25,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:25,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:25,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:35:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:25,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13948103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:25,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:25,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:35:25,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597214108] [2021-06-12 20:35:25,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:25,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:25,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:25,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:25,543 INFO L87 Difference]: Start difference. First operand 928 states and 3664 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-12 20:35:25,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:25,755 INFO L93 Difference]: Finished difference Result 1337 states and 5240 transitions. [2021-06-12 20:35:25,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:35:25,755 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 26 [2021-06-12 20:35:25,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:25,757 INFO L225 Difference]: With dead ends: 1337 [2021-06-12 20:35:25,757 INFO L226 Difference]: Without dead ends: 1254 [2021-06-12 20:35:25,758 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:35:25,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-06-12 20:35:25,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 922. [2021-06-12 20:35:25,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:25,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-06-12 20:35:25,770 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-06-12 20:35:25,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:25,770 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-06-12 20:35:25,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-12 20:35:25,770 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-06-12 20:35:25,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:25,772 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:25,772 INFO L472 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] [2021-06-12 20:35:25,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:25,972 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:25,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:25,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1137009814, now seen corresponding path program 11 times [2021-06-12 20:35:25,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:25,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701728052] [2021-06-12 20:35:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:26,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:26,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:26,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701728052] [2021-06-12 20:35:26,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701728052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:26,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683290708] [2021-06-12 20:35:26,038 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 [2021-06-12 20:35:26,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:35:26,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:26,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:26,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:26,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:26,166 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:35:26,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:26,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:26,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:26,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:35:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:26,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683290708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:26,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:26,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:35:26,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32691788] [2021-06-12 20:35:26,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:26,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:26,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:26,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:26,231 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:26,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:26,530 INFO L93 Difference]: Finished difference Result 1346 states and 5288 transitions. [2021-06-12 20:35:26,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:35:26,531 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:35:26,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:26,534 INFO L225 Difference]: With dead ends: 1346 [2021-06-12 20:35:26,534 INFO L226 Difference]: Without dead ends: 1264 [2021-06-12 20:35:26,534 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:35:26,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-06-12 20:35:26,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 940. [2021-06-12 20:35:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.9605963791267307) internal successors, (3719), 939 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:26,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3719 transitions. [2021-06-12 20:35:26,553 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3719 transitions. Word has length 26 [2021-06-12 20:35:26,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:26,553 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3719 transitions. [2021-06-12 20:35:26,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:26,553 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3719 transitions. [2021-06-12 20:35:26,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:26,555 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:26,555 INFO L472 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] [2021-06-12 20:35:26,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:26,769 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:26,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:26,769 INFO L82 PathProgramCache]: Analyzing trace with hash 416576346, now seen corresponding path program 12 times [2021-06-12 20:35:26,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:26,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287700655] [2021-06-12 20:35:26,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:26,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:26,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287700655] [2021-06-12 20:35:26,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287700655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:26,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257085209] [2021-06-12 20:35:26,834 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 [2021-06-12 20:35:26,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:35:26,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:26,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:26,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:26,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:26,947 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 [2021-06-12 20:35:26,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:26,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:26,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:26,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-12 20:35:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:27,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257085209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:27,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:27,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 20:35:27,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112918495] [2021-06-12 20:35:27,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:35:27,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:27,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:35:27,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:35:27,044 INFO L87 Difference]: Start difference. First operand 940 states and 3719 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 20:35:27,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:27,572 INFO L93 Difference]: Finished difference Result 1447 states and 5652 transitions. [2021-06-12 20:35:27,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:35:27,572 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 26 [2021-06-12 20:35:27,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:27,575 INFO L225 Difference]: With dead ends: 1447 [2021-06-12 20:35:27,575 INFO L226 Difference]: Without dead ends: 1374 [2021-06-12 20:35:27,575 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 360.7ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:35:27,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2021-06-12 20:35:27,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 931. [2021-06-12 20:35:27,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:27,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-06-12 20:35:27,594 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-06-12 20:35:27,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:27,595 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-06-12 20:35:27,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 20:35:27,595 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-06-12 20:35:27,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:27,597 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:27,597 INFO L472 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] [2021-06-12 20:35:27,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-12 20:35:27,797 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:27,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:27,797 INFO L82 PathProgramCache]: Analyzing trace with hash -781528676, now seen corresponding path program 13 times [2021-06-12 20:35:27,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:27,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861035007] [2021-06-12 20:35:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:27,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:27,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861035007] [2021-06-12 20:35:27,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861035007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:27,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482272828] [2021-06-12 20:35:27,878 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 [2021-06-12 20:35:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:27,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:27,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:28,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:28,008 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 [2021-06-12 20:35:28,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:28,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:28,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:28,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-12 20:35:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:28,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482272828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:28,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:28,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:35:28,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159429712] [2021-06-12 20:35:28,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:28,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:28,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:28,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:28,056 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 20:35:28,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:28,272 INFO L93 Difference]: Finished difference Result 1363 states and 5323 transitions. [2021-06-12 20:35:28,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:35:28,272 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 26 [2021-06-12 20:35:28,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:28,275 INFO L225 Difference]: With dead ends: 1363 [2021-06-12 20:35:28,275 INFO L226 Difference]: Without dead ends: 1292 [2021-06-12 20:35:28,275 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 183.4ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:35:28,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2021-06-12 20:35:28,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 955. [2021-06-12 20:35:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.9454926624737947) internal successors, (3764), 954 states have internal predecessors, (3764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3764 transitions. [2021-06-12 20:35:28,288 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3764 transitions. Word has length 26 [2021-06-12 20:35:28,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:28,288 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 3764 transitions. [2021-06-12 20:35:28,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-12 20:35:28,289 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3764 transitions. [2021-06-12 20:35:28,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:28,290 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:28,290 INFO L472 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] [2021-06-12 20:35:28,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:28,491 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:28,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:28,491 INFO L82 PathProgramCache]: Analyzing trace with hash 523210718, now seen corresponding path program 11 times [2021-06-12 20:35:28,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:28,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326332469] [2021-06-12 20:35:28,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:28,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:28,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326332469] [2021-06-12 20:35:28,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326332469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:28,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312864541] [2021-06-12 20:35:28,580 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 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 [2021-06-12 20:35:28,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:28,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:28,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:28,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:28,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:28,712 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 [2021-06-12 20:35:28,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:28,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:28,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:28,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-12 20:35:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:28,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312864541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:28,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:28,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:35:28,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566464018] [2021-06-12 20:35:28,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:28,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:28,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:28,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:28,759 INFO L87 Difference]: Start difference. First operand 955 states and 3764 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-12 20:35:29,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:29,067 INFO L93 Difference]: Finished difference Result 1327 states and 5197 transitions. [2021-06-12 20:35:29,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:35:29,067 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 26 [2021-06-12 20:35:29,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:29,070 INFO L225 Difference]: With dead ends: 1327 [2021-06-12 20:35:29,070 INFO L226 Difference]: Without dead ends: 1256 [2021-06-12 20:35:29,070 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:35:29,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-12 20:35:29,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 931. [2021-06-12 20:35:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:29,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-06-12 20:35:29,091 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-06-12 20:35:29,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:29,091 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-06-12 20:35:29,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-12 20:35:29,091 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-06-12 20:35:29,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:29,093 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:29,093 INFO L472 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] [2021-06-12 20:35:29,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-12 20:35:29,317 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:29,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:29,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1340286744, now seen corresponding path program 12 times [2021-06-12 20:35:29,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:29,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762332937] [2021-06-12 20:35:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:29,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:29,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762332937] [2021-06-12 20:35:29,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762332937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:29,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760970216] [2021-06-12 20:35:29,392 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 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 [2021-06-12 20:35:29,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:35:29,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:29,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:29,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:29,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:29,489 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 [2021-06-12 20:35:29,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:29,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:29,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:29,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-12 20:35:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:29,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760970216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:29,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:29,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 20:35:29,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020201035] [2021-06-12 20:35:29,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:29,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:29,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:29,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:29,620 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) 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) [2021-06-12 20:35:30,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:30,306 INFO L93 Difference]: Finished difference Result 1347 states and 5273 transitions. [2021-06-12 20:35:30,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:35:30,306 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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 26 [2021-06-12 20:35:30,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:30,308 INFO L225 Difference]: With dead ends: 1347 [2021-06-12 20:35:30,308 INFO L226 Difference]: Without dead ends: 1274 [2021-06-12 20:35:30,309 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 516.7ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:35:30,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-06-12 20:35:30,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 940. [2021-06-12 20:35:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.961661341853035) internal successors, (3720), 939 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3720 transitions. [2021-06-12 20:35:30,322 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3720 transitions. Word has length 26 [2021-06-12 20:35:30,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:30,322 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3720 transitions. [2021-06-12 20:35:30,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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) [2021-06-12 20:35:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3720 transitions. [2021-06-12 20:35:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:30,323 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:30,323 INFO L472 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] [2021-06-12 20:35:30,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-12 20:35:30,524 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:30,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:30,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1144526604, now seen corresponding path program 13 times [2021-06-12 20:35:30,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:30,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899926031] [2021-06-12 20:35:30,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:30,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:30,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899926031] [2021-06-12 20:35:30,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899926031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:30,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208599170] [2021-06-12 20:35:30,600 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 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 [2021-06-12 20:35:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:30,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:30,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:30,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:30,706 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 [2021-06-12 20:35:30,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:30,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:30,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:30,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:35:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:30,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208599170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:30,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:30,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:35:30,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141246814] [2021-06-12 20:35:30,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:30,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:30,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:30,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:30,772 INFO L87 Difference]: Start difference. First operand 940 states and 3720 transitions. Second operand has 12 states, 12 states have (on average 3.25) 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) [2021-06-12 20:35:30,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:30,998 INFO L93 Difference]: Finished difference Result 1292 states and 5072 transitions. [2021-06-12 20:35:30,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:35:30,998 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) 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 26 [2021-06-12 20:35:30,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:31,000 INFO L225 Difference]: With dead ends: 1292 [2021-06-12 20:35:31,000 INFO L226 Difference]: Without dead ends: 1217 [2021-06-12 20:35:31,001 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:35:31,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-06-12 20:35:31,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 922. [2021-06-12 20:35:31,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:31,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-06-12 20:35:31,013 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-06-12 20:35:31,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:31,013 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-06-12 20:35:31,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) 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) [2021-06-12 20:35:31,013 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-06-12 20:35:31,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:31,014 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:31,015 INFO L472 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] [2021-06-12 20:35:31,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:31,215 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:31,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:31,215 INFO L82 PathProgramCache]: Analyzing trace with hash -457858102, now seen corresponding path program 14 times [2021-06-12 20:35:31,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:31,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61954548] [2021-06-12 20:35:31,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:31,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:31,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61954548] [2021-06-12 20:35:31,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61954548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:31,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056532736] [2021-06-12 20:35:31,297 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 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 [2021-06-12 20:35:31,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:31,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:31,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:31,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:31,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:31,402 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 [2021-06-12 20:35:31,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:31,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:31,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:31,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:35:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:31,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056532736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:31,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:31,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:35:31,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817866332] [2021-06-12 20:35:31,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:31,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:31,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:31,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:31,456 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:31,794 INFO L93 Difference]: Finished difference Result 1628 states and 6288 transitions. [2021-06-12 20:35:31,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:35:31,794 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:35:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:31,796 INFO L225 Difference]: With dead ends: 1628 [2021-06-12 20:35:31,796 INFO L226 Difference]: Without dead ends: 1537 [2021-06-12 20:35:31,797 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 200.3ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:35:31,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-06-12 20:35:31,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 964. [2021-06-12 20:35:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 3.936656282450675) internal successors, (3791), 963 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 3791 transitions. [2021-06-12 20:35:31,811 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 3791 transitions. Word has length 26 [2021-06-12 20:35:31,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:31,812 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 3791 transitions. [2021-06-12 20:35:31,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:31,812 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 3791 transitions. [2021-06-12 20:35:31,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:31,814 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:31,814 INFO L472 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] [2021-06-12 20:35:32,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-12 20:35:32,036 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:32,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:32,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1044326460, now seen corresponding path program 14 times [2021-06-12 20:35:32,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:32,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868521955] [2021-06-12 20:35:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:32,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:32,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868521955] [2021-06-12 20:35:32,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868521955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:32,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527978837] [2021-06-12 20:35:32,114 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 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 [2021-06-12 20:35:32,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:32,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:32,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:32,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:32,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:32,244 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 16 treesize of output 18 [2021-06-12 20:35:32,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:32,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:32,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:32,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-06-12 20:35:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:32,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527978837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:32,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:32,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 20:35:32,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813694353] [2021-06-12 20:35:32,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:32,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:32,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:32,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:32,350 INFO L87 Difference]: Start difference. First operand 964 states and 3791 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:35:32,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:32,949 INFO L93 Difference]: Finished difference Result 1476 states and 5781 transitions. [2021-06-12 20:35:32,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:35:32,950 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 26 [2021-06-12 20:35:32,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:32,952 INFO L225 Difference]: With dead ends: 1476 [2021-06-12 20:35:32,952 INFO L226 Difference]: Without dead ends: 1394 [2021-06-12 20:35:32,952 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 437.8ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:35:32,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2021-06-12 20:35:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 931. [2021-06-12 20:35:32,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:32,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-06-12 20:35:32,965 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-06-12 20:35:32,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:32,965 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-06-12 20:35:32,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 20:35:32,966 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-06-12 20:35:32,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:32,967 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:32,967 INFO L472 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] [2021-06-12 20:35:33,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:33,168 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:33,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:33,168 INFO L82 PathProgramCache]: Analyzing trace with hash -542256876, now seen corresponding path program 15 times [2021-06-12 20:35:33,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:33,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591052606] [2021-06-12 20:35:33,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:33,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:33,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591052606] [2021-06-12 20:35:33,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591052606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:33,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395757604] [2021-06-12 20:35:33,268 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 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 [2021-06-12 20:35:33,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:35:33,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:33,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:33,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:33,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:33,372 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 [2021-06-12 20:35:33,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:33,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:33,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:33,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-12 20:35:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:33,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395757604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:33,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:33,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 20:35:33,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142760027] [2021-06-12 20:35:33,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:33,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:33,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:33,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:33,496 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:34,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:34,169 INFO L93 Difference]: Finished difference Result 1720 states and 6672 transitions. [2021-06-12 20:35:34,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:35:34,169 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:35:34,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:34,172 INFO L225 Difference]: With dead ends: 1720 [2021-06-12 20:35:34,172 INFO L226 Difference]: Without dead ends: 1556 [2021-06-12 20:35:34,172 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 530.7ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:35:34,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2021-06-12 20:35:34,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 931. [2021-06-12 20:35:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-06-12 20:35:34,186 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-06-12 20:35:34,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:34,186 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-06-12 20:35:34,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:34,186 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-06-12 20:35:34,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:34,188 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:34,188 INFO L472 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] [2021-06-12 20:35:34,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-12 20:35:34,388 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:34,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:34,389 INFO L82 PathProgramCache]: Analyzing trace with hash 349033132, now seen corresponding path program 16 times [2021-06-12 20:35:34,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:34,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406951964] [2021-06-12 20:35:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:34,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:34,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406951964] [2021-06-12 20:35:34,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406951964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:34,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080137403] [2021-06-12 20:35:34,471 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 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 [2021-06-12 20:35:34,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:35:34,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:34,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:34,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:34,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:34,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-12 20:35:34,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:34,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:34,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:35:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:34,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080137403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:34,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:34,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:35:34,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237353805] [2021-06-12 20:35:34,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:34,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:34,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:34,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:34,620 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:34,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:34,977 INFO L93 Difference]: Finished difference Result 1440 states and 5633 transitions. [2021-06-12 20:35:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:35:34,978 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:35:34,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:34,980 INFO L225 Difference]: With dead ends: 1440 [2021-06-12 20:35:34,980 INFO L226 Difference]: Without dead ends: 1350 [2021-06-12 20:35:34,981 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:35:34,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-12 20:35:34,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 931. [2021-06-12 20:35:34,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-06-12 20:35:34,995 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-06-12 20:35:34,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:34,995 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-06-12 20:35:34,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:34,995 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-06-12 20:35:34,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:34,997 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:34,997 INFO L472 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] [2021-06-12 20:35:35,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:35,197 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:35,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:35,198 INFO L82 PathProgramCache]: Analyzing trace with hash -972873768, now seen corresponding path program 15 times [2021-06-12 20:35:35,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:35,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787743799] [2021-06-12 20:35:35,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:35,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:35,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787743799] [2021-06-12 20:35:35,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787743799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:35,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484377687] [2021-06-12 20:35:35,267 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 [2021-06-12 20:35:35,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:35:35,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:35,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:35:35,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:35,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:35,365 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 [2021-06-12 20:35:35,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:35,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:35,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:35,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-06-12 20:35:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:35,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484377687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:35,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:35,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 20:35:35,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454736551] [2021-06-12 20:35:35,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:35:35,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:35,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:35:35,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:35:35,465 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-12 20:35:36,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:36,562 INFO L93 Difference]: Finished difference Result 1839 states and 7230 transitions. [2021-06-12 20:35:36,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:35:36,563 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 26 [2021-06-12 20:35:36,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:36,566 INFO L225 Difference]: With dead ends: 1839 [2021-06-12 20:35:36,566 INFO L226 Difference]: Without dead ends: 1757 [2021-06-12 20:35:36,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 788.2ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:35:36,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2021-06-12 20:35:36,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 940. [2021-06-12 20:35:36,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.957401490947817) internal successors, (3716), 939 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3716 transitions. [2021-06-12 20:35:36,580 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3716 transitions. Word has length 26 [2021-06-12 20:35:36,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:36,580 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3716 transitions. [2021-06-12 20:35:36,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2021-06-12 20:35:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3716 transitions. [2021-06-12 20:35:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:36,582 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:36,582 INFO L472 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] [2021-06-12 20:35:36,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-12 20:35:36,782 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:36,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:36,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1940178124, now seen corresponding path program 16 times [2021-06-12 20:35:36,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:36,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860724370] [2021-06-12 20:35:36,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:36,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:36,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860724370] [2021-06-12 20:35:36,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860724370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:36,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977274291] [2021-06-12 20:35:36,859 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 [2021-06-12 20:35:36,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:35:36,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:36,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:36,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:36,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:36,965 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 [2021-06-12 20:35:36,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:36,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:36,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:36,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:35:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:37,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977274291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:37,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:37,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:35:37,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517537553] [2021-06-12 20:35:37,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:37,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:37,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:37,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:37,040 INFO L87 Difference]: Start difference. First operand 940 states and 3716 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-12 20:35:37,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:37,270 INFO L93 Difference]: Finished difference Result 1338 states and 5238 transitions. [2021-06-12 20:35:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:35:37,271 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 26 [2021-06-12 20:35:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:37,273 INFO L225 Difference]: With dead ends: 1338 [2021-06-12 20:35:37,273 INFO L226 Difference]: Without dead ends: 1265 [2021-06-12 20:35:37,273 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:35:37,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-06-12 20:35:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 922. [2021-06-12 20:35:37,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:37,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-06-12 20:35:37,287 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-06-12 20:35:37,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:37,287 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-06-12 20:35:37,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-12 20:35:37,287 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-06-12 20:35:37,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:37,289 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:37,289 INFO L472 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] [2021-06-12 20:35:37,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:37,489 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:37,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:37,490 INFO L82 PathProgramCache]: Analyzing trace with hash -903815988, now seen corresponding path program 14 times [2021-06-12 20:35:37,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:37,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252915072] [2021-06-12 20:35:37,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:37,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:37,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252915072] [2021-06-12 20:35:37,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252915072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:37,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863190158] [2021-06-12 20:35:37,550 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 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 [2021-06-12 20:35:37,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:37,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:37,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:35:37,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:37,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:37,698 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 [2021-06-12 20:35:37,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:37,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:37,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:37,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-12 20:35:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:37,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863190158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:37,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:37,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:35:37,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402478940] [2021-06-12 20:35:37,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:35:37,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:37,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:35:37,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:35:37,779 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-06-12 20:35:38,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:38,622 INFO L93 Difference]: Finished difference Result 1733 states and 6757 transitions. [2021-06-12 20:35:38,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:35:38,622 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 26 [2021-06-12 20:35:38,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:38,625 INFO L225 Difference]: With dead ends: 1733 [2021-06-12 20:35:38,625 INFO L226 Difference]: Without dead ends: 1660 [2021-06-12 20:35:38,625 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 570.6ms TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:35:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2021-06-12 20:35:38,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 958. [2021-06-12 20:35:38,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 3.941483803552769) internal successors, (3772), 957 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:38,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3772 transitions. [2021-06-12 20:35:38,640 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3772 transitions. Word has length 26 [2021-06-12 20:35:38,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:38,640 INFO L482 AbstractCegarLoop]: Abstraction has 958 states and 3772 transitions. [2021-06-12 20:35:38,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-06-12 20:35:38,640 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3772 transitions. [2021-06-12 20:35:38,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:38,641 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:38,642 INFO L472 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] [2021-06-12 20:35:38,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:38,845 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:38,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:38,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1614115146, now seen corresponding path program 14 times [2021-06-12 20:35:38,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:38,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239872301] [2021-06-12 20:35:38,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:38,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:38,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239872301] [2021-06-12 20:35:38,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239872301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:38,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768468648] [2021-06-12 20:35:38,919 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 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 [2021-06-12 20:35:38,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:38,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:38,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:35:38,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:39,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:39,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-12 20:35:39,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:39,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:39,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:39,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-12 20:35:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:39,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768468648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:39,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:39,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:35:39,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117002952] [2021-06-12 20:35:39,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:35:39,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:39,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:35:39,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:35:39,180 INFO L87 Difference]: Start difference. First operand 958 states and 3772 transitions. Second operand has 15 states, 15 states have (on average 3.0) 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) [2021-06-12 20:35:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:40,103 INFO L93 Difference]: Finished difference Result 1686 states and 6593 transitions. [2021-06-12 20:35:40,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:35:40,103 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) 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 26 [2021-06-12 20:35:40,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:40,106 INFO L225 Difference]: With dead ends: 1686 [2021-06-12 20:35:40,106 INFO L226 Difference]: Without dead ends: 1613 [2021-06-12 20:35:40,106 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 564.8ms TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:35:40,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-06-12 20:35:40,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 931. [2021-06-12 20:35:40,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:40,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-06-12 20:35:40,121 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-06-12 20:35:40,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:40,121 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-06-12 20:35:40,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) 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) [2021-06-12 20:35:40,121 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-06-12 20:35:40,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:40,122 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:40,122 INFO L472 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] [2021-06-12 20:35:40,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:40,323 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:40,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:40,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1878957560, now seen corresponding path program 15 times [2021-06-12 20:35:40,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:40,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286768680] [2021-06-12 20:35:40,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:40,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:40,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286768680] [2021-06-12 20:35:40,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286768680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:40,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387052542] [2021-06-12 20:35:40,386 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 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 [2021-06-12 20:35:40,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:35:40,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:40,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:35:40,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:40,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:40,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-12 20:35:40,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:40,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:40,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:40,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:35:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:40,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387052542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:40,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:40,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:35:40,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423654986] [2021-06-12 20:35:40,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:35:40,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:40,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:35:40,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:35:40,631 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-06-12 20:35:41,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:41,790 INFO L93 Difference]: Finished difference Result 1771 states and 6888 transitions. [2021-06-12 20:35:41,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:35:41,791 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 26 [2021-06-12 20:35:41,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:41,794 INFO L225 Difference]: With dead ends: 1771 [2021-06-12 20:35:41,794 INFO L226 Difference]: Without dead ends: 1698 [2021-06-12 20:35:41,794 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 867.4ms TimeCoverageRelationStatistics Valid=337, Invalid=1223, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:35:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-06-12 20:35:41,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 940. [2021-06-12 20:35:41,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.9605963791267307) internal successors, (3719), 939 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:41,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3719 transitions. [2021-06-12 20:35:41,809 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3719 transitions. Word has length 26 [2021-06-12 20:35:41,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:41,809 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3719 transitions. [2021-06-12 20:35:41,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-06-12 20:35:41,810 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3719 transitions. [2021-06-12 20:35:41,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:41,811 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:41,811 INFO L472 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] [2021-06-12 20:35:42,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-12 20:35:42,011 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:42,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:42,012 INFO L82 PathProgramCache]: Analyzing trace with hash 2102483340, now seen corresponding path program 16 times [2021-06-12 20:35:42,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:42,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571360826] [2021-06-12 20:35:42,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:42,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:42,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571360826] [2021-06-12 20:35:42,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571360826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:42,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611623257] [2021-06-12 20:35:42,079 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 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 [2021-06-12 20:35:42,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:35:42,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:42,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:42,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:42,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:42,168 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 [2021-06-12 20:35:42,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:42,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:42,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:42,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:35:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:42,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611623257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:42,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:42,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:35:42,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740233255] [2021-06-12 20:35:42,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:42,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:42,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:42,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:42,227 INFO L87 Difference]: Start difference. First operand 940 states and 3719 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:42,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:42,494 INFO L93 Difference]: Finished difference Result 1357 states and 5335 transitions. [2021-06-12 20:35:42,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:35:42,494 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:35:42,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:42,496 INFO L225 Difference]: With dead ends: 1357 [2021-06-12 20:35:42,496 INFO L226 Difference]: Without dead ends: 1274 [2021-06-12 20:35:42,496 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:35:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-06-12 20:35:42,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 931. [2021-06-12 20:35:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:42,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-06-12 20:35:42,509 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-06-12 20:35:42,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:42,510 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-06-12 20:35:42,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:42,510 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-06-12 20:35:42,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:42,511 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:42,511 INFO L472 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] [2021-06-12 20:35:42,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-12 20:35:42,713 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:42,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:42,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1242984242, now seen corresponding path program 15 times [2021-06-12 20:35:42,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:42,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764913221] [2021-06-12 20:35:42,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:42,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:42,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764913221] [2021-06-12 20:35:42,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764913221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:42,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118918647] [2021-06-12 20:35:42,779 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 [2021-06-12 20:35:42,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:35:42,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:42,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:35:42,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:42,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:42,870 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 [2021-06-12 20:35:42,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:42,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:42,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:42,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:35:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:42,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118918647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:42,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:42,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:35:42,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726645477] [2021-06-12 20:35:42,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:35:42,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:42,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:35:42,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:35:42,980 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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) [2021-06-12 20:35:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:43,789 INFO L93 Difference]: Finished difference Result 1666 states and 6528 transitions. [2021-06-12 20:35:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:35:43,790 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 26 [2021-06-12 20:35:43,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:43,792 INFO L225 Difference]: With dead ends: 1666 [2021-06-12 20:35:43,792 INFO L226 Difference]: Without dead ends: 1593 [2021-06-12 20:35:43,792 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 573.9ms TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:35:43,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-06-12 20:35:43,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 940. [2021-06-12 20:35:43,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.961661341853035) internal successors, (3720), 939 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:43,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3720 transitions. [2021-06-12 20:35:43,808 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3720 transitions. Word has length 26 [2021-06-12 20:35:43,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:43,808 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3720 transitions. [2021-06-12 20:35:43,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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) [2021-06-12 20:35:43,808 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3720 transitions. [2021-06-12 20:35:43,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:43,810 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:43,810 INFO L472 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] [2021-06-12 20:35:44,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-12 20:35:44,010 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:44,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:44,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1070782094, now seen corresponding path program 16 times [2021-06-12 20:35:44,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:44,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386411276] [2021-06-12 20:35:44,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:44,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:44,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386411276] [2021-06-12 20:35:44,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386411276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:44,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438549054] [2021-06-12 20:35:44,075 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 [2021-06-12 20:35:44,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:35:44,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:44,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:44,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:44,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:44,164 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 [2021-06-12 20:35:44,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:44,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:44,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:44,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:35:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:44,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438549054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:44,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:44,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:35:44,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111815350] [2021-06-12 20:35:44,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:44,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:44,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:44,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:44,224 INFO L87 Difference]: Start difference. First operand 940 states and 3720 transitions. Second operand has 12 states, 12 states have (on average 3.25) 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) [2021-06-12 20:35:44,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:44,424 INFO L93 Difference]: Finished difference Result 1299 states and 5104 transitions. [2021-06-12 20:35:44,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:35:44,425 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) 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 26 [2021-06-12 20:35:44,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:44,427 INFO L225 Difference]: With dead ends: 1299 [2021-06-12 20:35:44,427 INFO L226 Difference]: Without dead ends: 1224 [2021-06-12 20:35:44,427 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 154.7ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:35:44,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-06-12 20:35:44,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 922. [2021-06-12 20:35:44,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-06-12 20:35:44,443 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-06-12 20:35:44,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:44,443 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-06-12 20:35:44,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) 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) [2021-06-12 20:35:44,443 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-06-12 20:35:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:44,446 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:44,446 INFO L472 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] [2021-06-12 20:35:44,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:44,647 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:44,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:44,647 INFO L82 PathProgramCache]: Analyzing trace with hash 514209786, now seen corresponding path program 17 times [2021-06-12 20:35:44,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:44,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40662550] [2021-06-12 20:35:44,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:44,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:44,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40662550] [2021-06-12 20:35:44,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40662550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:44,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516644338] [2021-06-12 20:35:44,746 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 [2021-06-12 20:35:44,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:35:44,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:44,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:44,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:44,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:44,891 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 [2021-06-12 20:35:44,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:44,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:44,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:44,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:35:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:44,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516644338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:44,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:44,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:35:44,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404617923] [2021-06-12 20:35:44,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:44,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:44,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:44,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:44,940 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-06-12 20:35:45,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:45,511 INFO L93 Difference]: Finished difference Result 2168 states and 8464 transitions. [2021-06-12 20:35:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:35:45,511 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 26 [2021-06-12 20:35:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:45,515 INFO L225 Difference]: With dead ends: 2168 [2021-06-12 20:35:45,515 INFO L226 Difference]: Without dead ends: 2086 [2021-06-12 20:35:45,515 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 320.9ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:35:45,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-06-12 20:35:45,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 984. [2021-06-12 20:35:45,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 3.9114954221770093) internal successors, (3845), 983 states have internal predecessors, (3845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:45,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 3845 transitions. [2021-06-12 20:35:45,531 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 3845 transitions. Word has length 26 [2021-06-12 20:35:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:45,531 INFO L482 AbstractCegarLoop]: Abstraction has 984 states and 3845 transitions. [2021-06-12 20:35:45,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-06-12 20:35:45,531 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 3845 transitions. [2021-06-12 20:35:45,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:45,532 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:45,532 INFO L472 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] [2021-06-12 20:35:45,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:45,733 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:45,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:45,733 INFO L82 PathProgramCache]: Analyzing trace with hash -72258572, now seen corresponding path program 17 times [2021-06-12 20:35:45,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:45,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900377311] [2021-06-12 20:35:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:45,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:45,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900377311] [2021-06-12 20:35:45,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900377311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:45,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778151842] [2021-06-12 20:35:45,800 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 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 [2021-06-12 20:35:45,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:45,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:45,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:45,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:45,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:45,948 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 [2021-06-12 20:35:45,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:45,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:45,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:35:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:46,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778151842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:46,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:46,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:35:46,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639740277] [2021-06-12 20:35:46,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:46,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:46,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:46,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:46,002 INFO L87 Difference]: Start difference. First operand 984 states and 3845 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-12 20:35:46,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:46,477 INFO L93 Difference]: Finished difference Result 2118 states and 8296 transitions. [2021-06-12 20:35:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:35:46,477 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 26 [2021-06-12 20:35:46,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:46,481 INFO L225 Difference]: With dead ends: 2118 [2021-06-12 20:35:46,481 INFO L226 Difference]: Without dead ends: 2036 [2021-06-12 20:35:46,481 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 230.8ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:35:46,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-06-12 20:35:46,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 954. [2021-06-12 20:35:46,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.931794333683106) internal successors, (3747), 953 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:46,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3747 transitions. [2021-06-12 20:35:46,497 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3747 transitions. Word has length 26 [2021-06-12 20:35:46,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:46,497 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3747 transitions. [2021-06-12 20:35:46,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-12 20:35:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3747 transitions. [2021-06-12 20:35:46,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:46,499 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:46,499 INFO L472 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] [2021-06-12 20:35:46,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:46,699 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:46,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:46,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1300056958, now seen corresponding path program 18 times [2021-06-12 20:35:46,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:46,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984707924] [2021-06-12 20:35:46,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:46,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:46,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984707924] [2021-06-12 20:35:46,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984707924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:46,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138109325] [2021-06-12 20:35:46,793 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 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 [2021-06-12 20:35:46,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:35:46,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:46,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:46,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:46,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:46,907 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 [2021-06-12 20:35:46,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:46,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:46,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:46,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-12 20:35:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:46,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138109325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:46,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:46,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 20:35:46,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296988348] [2021-06-12 20:35:46,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:35:46,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:46,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:35:46,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:35:46,979 INFO L87 Difference]: Start difference. First operand 954 states and 3747 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2021-06-12 20:35:47,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:47,631 INFO L93 Difference]: Finished difference Result 2208 states and 8474 transitions. [2021-06-12 20:35:47,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:35:47,631 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 26 [2021-06-12 20:35:47,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:47,635 INFO L225 Difference]: With dead ends: 2208 [2021-06-12 20:35:47,635 INFO L226 Difference]: Without dead ends: 2044 [2021-06-12 20:35:47,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 427.8ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:35:47,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-06-12 20:35:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 996. [2021-06-12 20:35:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.9115577889447235) internal successors, (3892), 995 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:47,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3892 transitions. [2021-06-12 20:35:47,652 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3892 transitions. Word has length 26 [2021-06-12 20:35:47,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:47,652 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3892 transitions. [2021-06-12 20:35:47,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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) [2021-06-12 20:35:47,652 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3892 transitions. [2021-06-12 20:35:47,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:47,654 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:47,654 INFO L472 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] [2021-06-12 20:35:47,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-06-12 20:35:47,857 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:47,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:47,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1886525316, now seen corresponding path program 18 times [2021-06-12 20:35:47,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:47,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807223523] [2021-06-12 20:35:47,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:47,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:47,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807223523] [2021-06-12 20:35:47,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807223523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:47,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765162837] [2021-06-12 20:35:47,945 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 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 [2021-06-12 20:35:47,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:35:47,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:47,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:47,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:48,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:48,088 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 16 treesize of output 18 [2021-06-12 20:35:48,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:48,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:48,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:48,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-06-12 20:35:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:48,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765162837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:48,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:48,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 20:35:48,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448994163] [2021-06-12 20:35:48,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:48,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:48,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:48,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:48,201 INFO L87 Difference]: Start difference. First operand 996 states and 3892 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:48,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:48,834 INFO L93 Difference]: Finished difference Result 1639 states and 6401 transitions. [2021-06-12 20:35:48,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:35:48,835 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:35:48,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:48,837 INFO L225 Difference]: With dead ends: 1639 [2021-06-12 20:35:48,837 INFO L226 Difference]: Without dead ends: 1557 [2021-06-12 20:35:48,838 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 457.1ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:35:48,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2021-06-12 20:35:48,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 963. [2021-06-12 20:35:48,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.9293139293139294) internal successors, (3780), 962 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3780 transitions. [2021-06-12 20:35:48,852 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3780 transitions. Word has length 26 [2021-06-12 20:35:48,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:48,852 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3780 transitions. [2021-06-12 20:35:48,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:48,853 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3780 transitions. [2021-06-12 20:35:48,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:48,854 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:48,854 INFO L472 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] [2021-06-12 20:35:49,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-12 20:35:49,054 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:49,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:49,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1153064272, now seen corresponding path program 19 times [2021-06-12 20:35:49,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:49,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331272720] [2021-06-12 20:35:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:49,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:49,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331272720] [2021-06-12 20:35:49,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331272720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:49,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526627641] [2021-06-12 20:35:49,173 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 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 [2021-06-12 20:35:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:49,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:49,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:49,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:49,274 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 [2021-06-12 20:35:49,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:49,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:49,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:49,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:35:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:49,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526627641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:49,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:49,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:35:49,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513103595] [2021-06-12 20:35:49,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:49,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:49,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:49,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:49,338 INFO L87 Difference]: Start difference. First operand 963 states and 3780 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-06-12 20:35:49,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:49,858 INFO L93 Difference]: Finished difference Result 1759 states and 6856 transitions. [2021-06-12 20:35:49,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:35:49,858 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 26 [2021-06-12 20:35:49,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:49,861 INFO L225 Difference]: With dead ends: 1759 [2021-06-12 20:35:49,861 INFO L226 Difference]: Without dead ends: 1668 [2021-06-12 20:35:49,861 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 339.7ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:35:49,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2021-06-12 20:35:49,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 963. [2021-06-12 20:35:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.9293139293139294) internal successors, (3780), 962 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:49,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3780 transitions. [2021-06-12 20:35:49,877 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3780 transitions. Word has length 26 [2021-06-12 20:35:49,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:49,877 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3780 transitions. [2021-06-12 20:35:49,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-06-12 20:35:49,877 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3780 transitions. [2021-06-12 20:35:49,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:49,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:49,878 INFO L472 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] [2021-06-12 20:35:50,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-12 20:35:50,079 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:50,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:50,079 INFO L82 PathProgramCache]: Analyzing trace with hash 2044354280, now seen corresponding path program 20 times [2021-06-12 20:35:50,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:50,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983066395] [2021-06-12 20:35:50,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:50,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:50,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983066395] [2021-06-12 20:35:50,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983066395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:50,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577137285] [2021-06-12 20:35:50,205 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 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 [2021-06-12 20:35:50,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:50,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:50,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:50,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:50,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:50,317 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 [2021-06-12 20:35:50,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:50,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:50,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:50,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:35:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:50,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577137285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:50,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:50,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:35:50,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233024638] [2021-06-12 20:35:50,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:35:50,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:50,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:35:50,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:35:50,380 INFO L87 Difference]: Start difference. First operand 963 states and 3780 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-06-12 20:35:50,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:50,938 INFO L93 Difference]: Finished difference Result 1718 states and 6708 transitions. [2021-06-12 20:35:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:35:50,938 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 26 [2021-06-12 20:35:50,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:50,941 INFO L225 Difference]: With dead ends: 1718 [2021-06-12 20:35:50,941 INFO L226 Difference]: Without dead ends: 1628 [2021-06-12 20:35:50,941 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 372.3ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:35:50,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-06-12 20:35:50,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 963. [2021-06-12 20:35:50,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.9293139293139294) internal successors, (3780), 962 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:50,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3780 transitions. [2021-06-12 20:35:50,955 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3780 transitions. Word has length 26 [2021-06-12 20:35:50,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:50,955 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3780 transitions. [2021-06-12 20:35:50,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-06-12 20:35:50,956 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3780 transitions. [2021-06-12 20:35:50,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:50,957 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:50,957 INFO L472 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] [2021-06-12 20:35:51,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:51,158 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:51,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:51,158 INFO L82 PathProgramCache]: Analyzing trace with hash 722447380, now seen corresponding path program 19 times [2021-06-12 20:35:51,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:51,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162223247] [2021-06-12 20:35:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:51,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:51,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162223247] [2021-06-12 20:35:51,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162223247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:51,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790631407] [2021-06-12 20:35:51,223 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 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 [2021-06-12 20:35:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:51,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:51,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:51,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:51,315 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 [2021-06-12 20:35:51,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:51,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:51,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:51,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:35:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:51,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790631407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:51,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:51,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:35:51,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102436247] [2021-06-12 20:35:51,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:51,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:51,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:51,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:51,375 INFO L87 Difference]: Start difference. First operand 963 states and 3780 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-12 20:35:51,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:51,691 INFO L93 Difference]: Finished difference Result 1509 states and 5906 transitions. [2021-06-12 20:35:51,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:35:51,691 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 26 [2021-06-12 20:35:51,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:51,693 INFO L225 Difference]: With dead ends: 1509 [2021-06-12 20:35:51,693 INFO L226 Difference]: Without dead ends: 1427 [2021-06-12 20:35:51,693 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 202.4ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:35:51,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-06-12 20:35:51,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 972. [2021-06-12 20:35:51,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 3.9309989701338828) internal successors, (3817), 971 states have internal predecessors, (3817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 3817 transitions. [2021-06-12 20:35:51,708 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 3817 transitions. Word has length 26 [2021-06-12 20:35:51,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:51,709 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 3817 transitions. [2021-06-12 20:35:51,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-12 20:35:51,709 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 3817 transitions. [2021-06-12 20:35:51,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:51,710 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:51,710 INFO L472 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] [2021-06-12 20:35:51,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:51,913 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:51,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:51,913 INFO L82 PathProgramCache]: Analyzing trace with hash -659468024, now seen corresponding path program 20 times [2021-06-12 20:35:51,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:51,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892233865] [2021-06-12 20:35:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:51,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:51,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892233865] [2021-06-12 20:35:51,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892233865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:51,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404484486] [2021-06-12 20:35:51,983 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 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 [2021-06-12 20:35:52,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:52,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:52,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:52,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:52,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:52,081 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 [2021-06-12 20:35:52,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:52,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:52,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:52,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:35:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:52,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404484486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:52,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:52,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:35:52,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239706578] [2021-06-12 20:35:52,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:52,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:52,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:52,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:52,141 INFO L87 Difference]: Start difference. First operand 972 states and 3817 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:52,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:52,474 INFO L93 Difference]: Finished difference Result 1493 states and 5826 transitions. [2021-06-12 20:35:52,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:35:52,475 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:35:52,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:52,477 INFO L225 Difference]: With dead ends: 1493 [2021-06-12 20:35:52,477 INFO L226 Difference]: Without dead ends: 1420 [2021-06-12 20:35:52,478 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:35:52,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-06-12 20:35:52,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 954. [2021-06-12 20:35:52,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.931794333683106) internal successors, (3747), 953 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3747 transitions. [2021-06-12 20:35:52,493 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3747 transitions. Word has length 26 [2021-06-12 20:35:52,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:52,493 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3747 transitions. [2021-06-12 20:35:52,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:52,493 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3747 transitions. [2021-06-12 20:35:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:52,494 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:52,494 INFO L472 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] [2021-06-12 20:35:52,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:52,695 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:52,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:52,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1371947268, now seen corresponding path program 17 times [2021-06-12 20:35:52,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:52,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473903166] [2021-06-12 20:35:52,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:52,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:52,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473903166] [2021-06-12 20:35:52,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473903166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:52,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880743179] [2021-06-12 20:35:52,750 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 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 [2021-06-12 20:35:52,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:52,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:52,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:52,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:52,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:52,870 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 [2021-06-12 20:35:52,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:52,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:52,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:52,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:35:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:52,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880743179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:52,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:52,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:35:52,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064047350] [2021-06-12 20:35:52,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:52,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:52,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:52,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:52,914 INFO L87 Difference]: Start difference. First operand 954 states and 3747 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:53,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:53,341 INFO L93 Difference]: Finished difference Result 1935 states and 7456 transitions. [2021-06-12 20:35:53,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:35:53,342 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:35:53,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:53,345 INFO L225 Difference]: With dead ends: 1935 [2021-06-12 20:35:53,345 INFO L226 Difference]: Without dead ends: 1862 [2021-06-12 20:35:53,345 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:35:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-06-12 20:35:53,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1004. [2021-06-12 20:35:53,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 3.8913260219341974) internal successors, (3903), 1003 states have internal predecessors, (3903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:53,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 3903 transitions. [2021-06-12 20:35:53,360 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 3903 transitions. Word has length 26 [2021-06-12 20:35:53,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:53,360 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 3903 transitions. [2021-06-12 20:35:53,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:53,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 3903 transitions. [2021-06-12 20:35:53,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:53,361 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:53,361 INFO L472 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] [2021-06-12 20:35:53,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:53,562 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:53,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:53,562 INFO L82 PathProgramCache]: Analyzing trace with hash -2082246426, now seen corresponding path program 17 times [2021-06-12 20:35:53,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:53,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717507050] [2021-06-12 20:35:53,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:53,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:53,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717507050] [2021-06-12 20:35:53,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717507050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:53,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346879610] [2021-06-12 20:35:53,630 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 [2021-06-12 20:35:53,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:53,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:53,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:53,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:53,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:53,749 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 [2021-06-12 20:35:53,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:53,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:53,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:53,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:35:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:53,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346879610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:53,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:53,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:35:53,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63623871] [2021-06-12 20:35:53,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:53,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:53,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:53,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:53,795 INFO L87 Difference]: Start difference. First operand 1004 states and 3903 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) 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) [2021-06-12 20:35:54,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:54,211 INFO L93 Difference]: Finished difference Result 1890 states and 7297 transitions. [2021-06-12 20:35:54,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:35:54,211 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) 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 26 [2021-06-12 20:35:54,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:54,214 INFO L225 Difference]: With dead ends: 1890 [2021-06-12 20:35:54,214 INFO L226 Difference]: Without dead ends: 1817 [2021-06-12 20:35:54,215 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 202.6ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:35:54,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-06-12 20:35:54,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 960. [2021-06-12 20:35:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.9280500521376434) internal successors, (3767), 959 states have internal predecessors, (3767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:54,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3767 transitions. [2021-06-12 20:35:54,230 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3767 transitions. Word has length 26 [2021-06-12 20:35:54,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:54,230 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3767 transitions. [2021-06-12 20:35:54,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) 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) [2021-06-12 20:35:54,230 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3767 transitions. [2021-06-12 20:35:54,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:54,232 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:54,232 INFO L472 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] [2021-06-12 20:35:54,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-12 20:35:54,432 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:54,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:54,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1349864576, now seen corresponding path program 18 times [2021-06-12 20:35:54,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:54,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787482383] [2021-06-12 20:35:54,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:54,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:54,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787482383] [2021-06-12 20:35:54,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787482383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:54,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615270444] [2021-06-12 20:35:54,496 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 [2021-06-12 20:35:54,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:35:54,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:54,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:35:54,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:54,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:54,653 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 [2021-06-12 20:35:54,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:54,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:54,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:54,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-12 20:35:54,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:54,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615270444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:54,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:54,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:35:54,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500407930] [2021-06-12 20:35:54,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:35:54,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:54,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:35:54,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:35:54,744 INFO L87 Difference]: Start difference. First operand 960 states and 3767 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-06-12 20:35:55,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:55,687 INFO L93 Difference]: Finished difference Result 1716 states and 6679 transitions. [2021-06-12 20:35:55,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:35:55,687 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 26 [2021-06-12 20:35:55,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:55,691 INFO L225 Difference]: With dead ends: 1716 [2021-06-12 20:35:55,691 INFO L226 Difference]: Without dead ends: 1643 [2021-06-12 20:35:55,691 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 657.8ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:35:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-06-12 20:35:55,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 996. [2021-06-12 20:35:55,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.912562814070352) internal successors, (3893), 995 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:55,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3893 transitions. [2021-06-12 20:35:55,706 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3893 transitions. Word has length 26 [2021-06-12 20:35:55,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:55,706 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3893 transitions. [2021-06-12 20:35:55,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-06-12 20:35:55,706 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3893 transitions. [2021-06-12 20:35:55,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:55,707 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:55,707 INFO L472 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] [2021-06-12 20:35:55,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-12 20:35:55,908 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:55,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:55,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2060163734, now seen corresponding path program 18 times [2021-06-12 20:35:55,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:55,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477726161] [2021-06-12 20:35:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:55,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:55,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477726161] [2021-06-12 20:35:55,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477726161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:55,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829134463] [2021-06-12 20:35:55,965 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 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 [2021-06-12 20:35:56,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:35:56,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:56,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:35:56,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:56,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:56,097 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 [2021-06-12 20:35:56,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:56,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:56,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:56,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-12 20:35:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:56,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829134463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:56,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:56,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:35:56,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177785267] [2021-06-12 20:35:56,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:35:56,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:56,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:35:56,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:35:56,176 INFO L87 Difference]: Start difference. First operand 996 states and 3893 transitions. Second operand has 15 states, 15 states have (on average 3.0) 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) [2021-06-12 20:35:57,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:57,066 INFO L93 Difference]: Finished difference Result 1669 states and 6515 transitions. [2021-06-12 20:35:57,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:35:57,067 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) 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 26 [2021-06-12 20:35:57,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:57,069 INFO L225 Difference]: With dead ends: 1669 [2021-06-12 20:35:57,069 INFO L226 Difference]: Without dead ends: 1596 [2021-06-12 20:35:57,070 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 575.2ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:35:57,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-06-12 20:35:57,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 969. [2021-06-12 20:35:57,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 3.928719008264463) internal successors, (3803), 968 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:57,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 3803 transitions. [2021-06-12 20:35:57,083 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 3803 transitions. Word has length 26 [2021-06-12 20:35:57,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:57,083 INFO L482 AbstractCegarLoop]: Abstraction has 969 states and 3803 transitions. [2021-06-12 20:35:57,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) 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) [2021-06-12 20:35:57,084 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 3803 transitions. [2021-06-12 20:35:57,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:57,085 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:57,085 INFO L472 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] [2021-06-12 20:35:57,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-12 20:35:57,285 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:57,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:57,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1969961148, now seen corresponding path program 19 times [2021-06-12 20:35:57,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:57,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842868947] [2021-06-12 20:35:57,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:57,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:57,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842868947] [2021-06-12 20:35:57,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842868947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:57,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320093323] [2021-06-12 20:35:57,345 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 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 [2021-06-12 20:35:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:57,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:57,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:57,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:57,470 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 [2021-06-12 20:35:57,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:57,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:57,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:57,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:35:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:57,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320093323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:57,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:57,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:35:57,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306667194] [2021-06-12 20:35:57,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:57,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:57,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:57,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:57,531 INFO L87 Difference]: Start difference. First operand 969 states and 3803 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:57,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:57,819 INFO L93 Difference]: Finished difference Result 1492 states and 5839 transitions. [2021-06-12 20:35:57,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:35:57,819 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:35:57,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:57,822 INFO L225 Difference]: With dead ends: 1492 [2021-06-12 20:35:57,822 INFO L226 Difference]: Without dead ends: 1419 [2021-06-12 20:35:57,822 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 181.9ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:35:57,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-06-12 20:35:57,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 978. [2021-06-12 20:35:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 3.930399181166837) internal successors, (3840), 977 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:57,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 3840 transitions. [2021-06-12 20:35:57,835 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 3840 transitions. Word has length 26 [2021-06-12 20:35:57,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:57,835 INFO L482 AbstractCegarLoop]: Abstraction has 978 states and 3840 transitions. [2021-06-12 20:35:57,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:57,835 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 3840 transitions. [2021-06-12 20:35:57,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:57,836 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:57,836 INFO L472 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] [2021-06-12 20:35:58,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-12 20:35:58,037 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:58,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:58,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1656434752, now seen corresponding path program 20 times [2021-06-12 20:35:58,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:58,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207875486] [2021-06-12 20:35:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:58,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:58,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207875486] [2021-06-12 20:35:58,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207875486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:58,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988625456] [2021-06-12 20:35:58,088 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 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 [2021-06-12 20:35:58,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:58,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:58,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:35:58,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:58,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:58,181 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 [2021-06-12 20:35:58,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:35:58,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:58,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:58,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:35:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:58,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988625456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:58,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:58,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:35:58,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954700821] [2021-06-12 20:35:58,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:35:58,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:58,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:35:58,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:35:58,304 INFO L87 Difference]: Start difference. First operand 978 states and 3840 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-06-12 20:35:59,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:59,444 INFO L93 Difference]: Finished difference Result 1759 states and 6869 transitions. [2021-06-12 20:35:59,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:35:59,445 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 26 [2021-06-12 20:35:59,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:59,447 INFO L225 Difference]: With dead ends: 1759 [2021-06-12 20:35:59,447 INFO L226 Difference]: Without dead ends: 1676 [2021-06-12 20:35:59,447 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 715.3ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:35:59,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2021-06-12 20:35:59,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 969. [2021-06-12 20:35:59,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 3.928719008264463) internal successors, (3803), 968 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:59,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 3803 transitions. [2021-06-12 20:35:59,462 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 3803 transitions. Word has length 26 [2021-06-12 20:35:59,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:59,462 INFO L482 AbstractCegarLoop]: Abstraction has 969 states and 3803 transitions. [2021-06-12 20:35:59,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-06-12 20:35:59,462 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 3803 transitions. [2021-06-12 20:35:59,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:35:59,463 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:59,463 INFO L472 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] [2021-06-12 20:35:59,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:59,664 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:59,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:59,664 INFO L82 PathProgramCache]: Analyzing trace with hash 796935654, now seen corresponding path program 19 times [2021-06-12 20:35:59,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:59,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677007228] [2021-06-12 20:35:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:59,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:59,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677007228] [2021-06-12 20:35:59,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677007228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:59,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101189511] [2021-06-12 20:35:59,717 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 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 [2021-06-12 20:35:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:59,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:35:59,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:59,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:35:59,822 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 [2021-06-12 20:35:59,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:35:59,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:35:59,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:35:59,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:35:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:59,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101189511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:59,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:59,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:35:59,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419221351] [2021-06-12 20:35:59,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:59,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:59,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:59,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:59,882 INFO L87 Difference]: Start difference. First operand 969 states and 3803 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) 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) [2021-06-12 20:36:00,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:00,220 INFO L93 Difference]: Finished difference Result 1439 states and 5646 transitions. [2021-06-12 20:36:00,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:36:00,220 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) 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 26 [2021-06-12 20:36:00,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:00,222 INFO L225 Difference]: With dead ends: 1439 [2021-06-12 20:36:00,222 INFO L226 Difference]: Without dead ends: 1366 [2021-06-12 20:36:00,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:36:00,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-06-12 20:36:00,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 978. [2021-06-12 20:36:00,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 3.9314227226202663) internal successors, (3841), 977 states have internal predecessors, (3841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 3841 transitions. [2021-06-12 20:36:00,236 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 3841 transitions. Word has length 26 [2021-06-12 20:36:00,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:00,236 INFO L482 AbstractCegarLoop]: Abstraction has 978 states and 3841 transitions. [2021-06-12 20:36:00,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) 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) [2021-06-12 20:36:00,236 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 3841 transitions. [2021-06-12 20:36:00,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:36:00,238 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:00,238 INFO L472 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] [2021-06-12 20:36:00,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:00,453 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:00,453 INFO L82 PathProgramCache]: Analyzing trace with hash 624733506, now seen corresponding path program 20 times [2021-06-12 20:36:00,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:00,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801654452] [2021-06-12 20:36:00,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:00,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:00,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:00,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801654452] [2021-06-12 20:36:00,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801654452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:00,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860103403] [2021-06-12 20:36:00,516 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 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 [2021-06-12 20:36:00,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:00,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:00,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:36:00,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:00,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:00,631 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 [2021-06-12 20:36:00,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:36:00,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:00,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:00,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:36:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:00,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860103403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:00,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:00,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:36:00,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546627434] [2021-06-12 20:36:00,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:36:00,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:00,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:36:00,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:36:00,749 INFO L87 Difference]: Start difference. First operand 978 states and 3841 transitions. Second operand has 15 states, 15 states have (on average 3.0) 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) [2021-06-12 20:36:01,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:01,851 INFO L93 Difference]: Finished difference Result 1688 states and 6589 transitions. [2021-06-12 20:36:01,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:36:01,851 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) 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 26 [2021-06-12 20:36:01,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:01,854 INFO L225 Difference]: With dead ends: 1688 [2021-06-12 20:36:01,854 INFO L226 Difference]: Without dead ends: 1613 [2021-06-12 20:36:01,854 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 733.8ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:36:01,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-06-12 20:36:01,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 960. [2021-06-12 20:36:01,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.9280500521376434) internal successors, (3767), 959 states have internal predecessors, (3767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:01,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3767 transitions. [2021-06-12 20:36:01,868 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3767 transitions. Word has length 26 [2021-06-12 20:36:01,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:01,868 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3767 transitions. [2021-06-12 20:36:01,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) 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) [2021-06-12 20:36:01,868 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3767 transitions. [2021-06-12 20:36:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:01,870 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:01,870 INFO L472 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] [2021-06-12 20:36:02,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:02,070 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:02,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:02,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1823844999, now seen corresponding path program 21 times [2021-06-12 20:36:02,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:02,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892419406] [2021-06-12 20:36:02,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:02,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:02,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892419406] [2021-06-12 20:36:02,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892419406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:02,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770558562] [2021-06-12 20:36:02,092 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 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 [2021-06-12 20:36:02,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:36:02,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:02,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:02,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:02,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770558562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:02,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:02,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 20:36:02,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453287077] [2021-06-12 20:36:02,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:36:02,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:02,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:36:02,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:36:02,191 INFO L87 Difference]: Start difference. First operand 960 states and 3767 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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) [2021-06-12 20:36:02,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:02,441 INFO L93 Difference]: Finished difference Result 3279 states and 12423 transitions. [2021-06-12 20:36:02,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:36:02,441 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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 28 [2021-06-12 20:36:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:02,447 INFO L225 Difference]: With dead ends: 3279 [2021-06-12 20:36:02,447 INFO L226 Difference]: Without dead ends: 3102 [2021-06-12 20:36:02,447 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:36:02,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3102 states. [2021-06-12 20:36:02,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3102 to 1434. [2021-06-12 20:36:02,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 4.174459176552687) internal successors, (5982), 1433 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:02,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 5982 transitions. [2021-06-12 20:36:02,474 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 5982 transitions. Word has length 28 [2021-06-12 20:36:02,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:02,475 INFO L482 AbstractCegarLoop]: Abstraction has 1434 states and 5982 transitions. [2021-06-12 20:36:02,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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) [2021-06-12 20:36:02,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 5982 transitions. [2021-06-12 20:36:02,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:02,477 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:02,477 INFO L472 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] [2021-06-12 20:36:02,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-12 20:36:02,677 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:02,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:02,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1964500729, now seen corresponding path program 22 times [2021-06-12 20:36:02,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:02,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821669539] [2021-06-12 20:36:02,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:02,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:02,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821669539] [2021-06-12 20:36:02,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821669539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:02,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109372153] [2021-06-12 20:36:02,699 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 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 [2021-06-12 20:36:02,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:36:02,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:02,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:02,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:02,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109372153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:02,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:02,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 20:36:02,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081921254] [2021-06-12 20:36:02,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:36:02,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:02,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:36:02,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:36:02,798 INFO L87 Difference]: Start difference. First operand 1434 states and 5982 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2021-06-12 20:36:03,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:03,006 INFO L93 Difference]: Finished difference Result 3236 states and 12555 transitions. [2021-06-12 20:36:03,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:36:03,006 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 28 [2021-06-12 20:36:03,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:03,011 INFO L225 Difference]: With dead ends: 3236 [2021-06-12 20:36:03,011 INFO L226 Difference]: Without dead ends: 2982 [2021-06-12 20:36:03,011 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:36:03,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-06-12 20:36:03,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 1795. [2021-06-12 20:36:03,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 4.193979933110368) internal successors, (7524), 1794 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:03,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 7524 transitions. [2021-06-12 20:36:03,041 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 7524 transitions. Word has length 28 [2021-06-12 20:36:03,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:03,041 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 7524 transitions. [2021-06-12 20:36:03,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2021-06-12 20:36:03,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 7524 transitions. [2021-06-12 20:36:03,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:03,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:03,044 INFO L472 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] [2021-06-12 20:36:03,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-12 20:36:03,244 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:03,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1098043517, now seen corresponding path program 23 times [2021-06-12 20:36:03,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:03,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038951710] [2021-06-12 20:36:03,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:03,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:03,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038951710] [2021-06-12 20:36:03,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038951710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:03,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335986982] [2021-06-12 20:36:03,262 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 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 [2021-06-12 20:36:03,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:36:03,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:03,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:03,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:03,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335986982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:03,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:03,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 20:36:03,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458761294] [2021-06-12 20:36:03,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:03,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:03,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:03,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:03,359 INFO L87 Difference]: Start difference. First operand 1795 states and 7524 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-06-12 20:36:03,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:03,563 INFO L93 Difference]: Finished difference Result 3187 states and 12461 transitions. [2021-06-12 20:36:03,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:36:03,564 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 28 [2021-06-12 20:36:03,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:03,569 INFO L225 Difference]: With dead ends: 3187 [2021-06-12 20:36:03,569 INFO L226 Difference]: Without dead ends: 3089 [2021-06-12 20:36:03,569 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:36:03,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2021-06-12 20:36:03,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 1790. [2021-06-12 20:36:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1789 states have (on average 4.18278367803242) internal successors, (7483), 1789 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) [2021-06-12 20:36:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 7483 transitions. [2021-06-12 20:36:03,603 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 7483 transitions. Word has length 28 [2021-06-12 20:36:03,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:03,604 INFO L482 AbstractCegarLoop]: Abstraction has 1790 states and 7483 transitions. [2021-06-12 20:36:03,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-06-12 20:36:03,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 7483 transitions. [2021-06-12 20:36:03,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:03,606 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:03,606 INFO L472 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] [2021-06-12 20:36:03,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-12 20:36:03,807 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:03,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:03,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1929816143, now seen corresponding path program 24 times [2021-06-12 20:36:03,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:03,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505198981] [2021-06-12 20:36:03,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:03,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:03,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505198981] [2021-06-12 20:36:03,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505198981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:03,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292338882] [2021-06-12 20:36:03,827 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 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 [2021-06-12 20:36:03,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:36:03,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:03,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:03,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:03,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292338882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:03,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:03,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 20:36:03,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049992725] [2021-06-12 20:36:03,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:03,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:03,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:03,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:03,956 INFO L87 Difference]: Start difference. First operand 1790 states and 7483 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:04,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:04,107 INFO L93 Difference]: Finished difference Result 3507 states and 13666 transitions. [2021-06-12 20:36:04,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:36:04,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 20:36:04,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:04,112 INFO L225 Difference]: With dead ends: 3507 [2021-06-12 20:36:04,113 INFO L226 Difference]: Without dead ends: 3255 [2021-06-12 20:36:04,113 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:36:04,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2021-06-12 20:36:04,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2159. [2021-06-12 20:36:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2158 states have (on average 4.244670991658944) internal successors, (9160), 2158 states have internal predecessors, (9160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:04,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 9160 transitions. [2021-06-12 20:36:04,150 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 9160 transitions. Word has length 28 [2021-06-12 20:36:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:04,150 INFO L482 AbstractCegarLoop]: Abstraction has 2159 states and 9160 transitions. [2021-06-12 20:36:04,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:04,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 9160 transitions. [2021-06-12 20:36:04,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:04,153 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:04,154 INFO L472 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] [2021-06-12 20:36:04,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-12 20:36:04,354 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:04,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:04,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1419687985, now seen corresponding path program 25 times [2021-06-12 20:36:04,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:04,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420979706] [2021-06-12 20:36:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:04,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:04,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420979706] [2021-06-12 20:36:04,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420979706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:04,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128140642] [2021-06-12 20:36:04,373 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 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 [2021-06-12 20:36:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:04,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:04,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:04,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128140642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:04,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:04,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 20:36:04,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250979688] [2021-06-12 20:36:04,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:04,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:04,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:04,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:04,470 INFO L87 Difference]: Start difference. First operand 2159 states and 9160 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-06-12 20:36:04,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:04,647 INFO L93 Difference]: Finished difference Result 3239 states and 13025 transitions. [2021-06-12 20:36:04,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:36:04,647 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 28 [2021-06-12 20:36:04,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:04,653 INFO L225 Difference]: With dead ends: 3239 [2021-06-12 20:36:04,653 INFO L226 Difference]: Without dead ends: 3150 [2021-06-12 20:36:04,653 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:36:04,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2021-06-12 20:36:04,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 2206. [2021-06-12 20:36:04,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 4.284353741496599) internal successors, (9447), 2205 states have internal predecessors, (9447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:04,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 9447 transitions. [2021-06-12 20:36:04,687 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 9447 transitions. Word has length 28 [2021-06-12 20:36:04,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:04,687 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 9447 transitions. [2021-06-12 20:36:04,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-06-12 20:36:04,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 9447 transitions. [2021-06-12 20:36:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:04,690 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:04,690 INFO L472 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] [2021-06-12 20:36:04,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:04,890 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:04,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:04,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1022624813, now seen corresponding path program 26 times [2021-06-12 20:36:04,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:04,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773180934] [2021-06-12 20:36:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:04,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:04,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773180934] [2021-06-12 20:36:04,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773180934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:04,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626617928] [2021-06-12 20:36:04,911 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 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 [2021-06-12 20:36:04,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:04,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:04,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:04,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:05,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626617928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:05,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:05,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 20:36:05,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670203617] [2021-06-12 20:36:05,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:05,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:05,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:05,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:05,029 INFO L87 Difference]: Start difference. First operand 2206 states and 9447 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-06-12 20:36:05,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:05,204 INFO L93 Difference]: Finished difference Result 5842 states and 23522 transitions. [2021-06-12 20:36:05,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:36:05,204 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 28 [2021-06-12 20:36:05,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:05,214 INFO L225 Difference]: With dead ends: 5842 [2021-06-12 20:36:05,215 INFO L226 Difference]: Without dead ends: 5604 [2021-06-12 20:36:05,215 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:36:05,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5604 states. [2021-06-12 20:36:05,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5604 to 3077. [2021-06-12 20:36:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 4.447009102730819) internal successors, (13679), 3076 states have internal predecessors, (13679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 13679 transitions. [2021-06-12 20:36:05,278 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 13679 transitions. Word has length 28 [2021-06-12 20:36:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:05,278 INFO L482 AbstractCegarLoop]: Abstraction has 3077 states and 13679 transitions. [2021-06-12 20:36:05,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-06-12 20:36:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 13679 transitions. [2021-06-12 20:36:05,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:05,283 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:05,283 INFO L472 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] [2021-06-12 20:36:05,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:05,484 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:05,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:05,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1332519461, now seen corresponding path program 27 times [2021-06-12 20:36:05,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:05,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824182543] [2021-06-12 20:36:05,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:36:05,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:05,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824182543] [2021-06-12 20:36:05,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824182543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:05,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932339095] [2021-06-12 20:36:05,504 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 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 [2021-06-12 20:36:05,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:36:05,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:05,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:05,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:05,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932339095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:05,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:05,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 20:36:05,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689843737] [2021-06-12 20:36:05,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:05,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:05,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:05,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:05,599 INFO L87 Difference]: Start difference. First operand 3077 states and 13679 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-06-12 20:36:05,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:05,831 INFO L93 Difference]: Finished difference Result 5963 states and 23745 transitions. [2021-06-12 20:36:05,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:36:05,831 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 28 [2021-06-12 20:36:05,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:05,841 INFO L225 Difference]: With dead ends: 5963 [2021-06-12 20:36:05,842 INFO L226 Difference]: Without dead ends: 5804 [2021-06-12 20:36:05,842 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:36:05,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5804 states. [2021-06-12 20:36:05,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5804 to 2984. [2021-06-12 20:36:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2984 states, 2983 states have (on average 4.44217230975528) internal successors, (13251), 2983 states have internal predecessors, (13251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2984 states to 2984 states and 13251 transitions. [2021-06-12 20:36:05,928 INFO L78 Accepts]: Start accepts. Automaton has 2984 states and 13251 transitions. Word has length 28 [2021-06-12 20:36:05,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:05,928 INFO L482 AbstractCegarLoop]: Abstraction has 2984 states and 13251 transitions. [2021-06-12 20:36:05,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-06-12 20:36:05,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2984 states and 13251 transitions. [2021-06-12 20:36:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:05,933 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:05,933 INFO L472 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] [2021-06-12 20:36:06,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:06,133 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:06,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:06,134 INFO L82 PathProgramCache]: Analyzing trace with hash 80086205, now seen corresponding path program 28 times [2021-06-12 20:36:06,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:06,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818270318] [2021-06-12 20:36:06,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:06,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:06,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818270318] [2021-06-12 20:36:06,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818270318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:06,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804543506] [2021-06-12 20:36:06,173 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 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 [2021-06-12 20:36:06,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:36:06,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:06,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:06,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:06,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804543506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:06,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:06,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 20:36:06,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279459576] [2021-06-12 20:36:06,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:36:06,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:06,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:36:06,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:36:06,281 INFO L87 Difference]: Start difference. First operand 2984 states and 13251 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) 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) [2021-06-12 20:36:06,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:06,525 INFO L93 Difference]: Finished difference Result 5675 states and 22909 transitions. [2021-06-12 20:36:06,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:36:06,525 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) 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 28 [2021-06-12 20:36:06,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:06,535 INFO L225 Difference]: With dead ends: 5675 [2021-06-12 20:36:06,535 INFO L226 Difference]: Without dead ends: 5594 [2021-06-12 20:36:06,536 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 144.9ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:36:06,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5594 states. [2021-06-12 20:36:06,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5594 to 3213. [2021-06-12 20:36:06,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 4.452988792029888) internal successors, (14303), 3212 states have internal predecessors, (14303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:06,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 14303 transitions. [2021-06-12 20:36:06,604 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 14303 transitions. Word has length 28 [2021-06-12 20:36:06,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:06,604 INFO L482 AbstractCegarLoop]: Abstraction has 3213 states and 14303 transitions. [2021-06-12 20:36:06,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) 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) [2021-06-12 20:36:06,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 14303 transitions. [2021-06-12 20:36:06,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:06,609 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:06,609 INFO L472 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] [2021-06-12 20:36:06,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:06,810 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:06,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:06,810 INFO L82 PathProgramCache]: Analyzing trace with hash 420207487, now seen corresponding path program 29 times [2021-06-12 20:36:06,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:06,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560241889] [2021-06-12 20:36:06,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:06,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:06,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560241889] [2021-06-12 20:36:06,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560241889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:06,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118827838] [2021-06-12 20:36:06,832 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 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 [2021-06-12 20:36:06,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:36:06,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:06,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:06,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:06,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118827838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:06,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:06,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:36:06,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088377854] [2021-06-12 20:36:06,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:06,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:06,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:06,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:06,931 INFO L87 Difference]: Start difference. First operand 3213 states and 14303 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-06-12 20:36:07,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:07,142 INFO L93 Difference]: Finished difference Result 5452 states and 22207 transitions. [2021-06-12 20:36:07,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:36:07,143 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 28 [2021-06-12 20:36:07,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:07,153 INFO L225 Difference]: With dead ends: 5452 [2021-06-12 20:36:07,153 INFO L226 Difference]: Without dead ends: 5364 [2021-06-12 20:36:07,153 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:36:07,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5364 states. [2021-06-12 20:36:07,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5364 to 3341. [2021-06-12 20:36:07,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3341 states, 3340 states have (on average 4.440718562874252) internal successors, (14832), 3340 states have internal predecessors, (14832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3341 states to 3341 states and 14832 transitions. [2021-06-12 20:36:07,244 INFO L78 Accepts]: Start accepts. Automaton has 3341 states and 14832 transitions. Word has length 28 [2021-06-12 20:36:07,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:07,244 INFO L482 AbstractCegarLoop]: Abstraction has 3341 states and 14832 transitions. [2021-06-12 20:36:07,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-06-12 20:36:07,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3341 states and 14832 transitions. [2021-06-12 20:36:07,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:07,251 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:07,251 INFO L472 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] [2021-06-12 20:36:07,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:07,473 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:07,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:07,473 INFO L82 PathProgramCache]: Analyzing trace with hash -86414081, now seen corresponding path program 30 times [2021-06-12 20:36:07,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:07,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850690222] [2021-06-12 20:36:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:07,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:07,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850690222] [2021-06-12 20:36:07,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850690222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:07,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677677970] [2021-06-12 20:36:07,496 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 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 [2021-06-12 20:36:07,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:36:07,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:07,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:07,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:07,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677677970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:07,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:07,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:36:07,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114800345] [2021-06-12 20:36:07,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:07,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:07,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:07,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:07,586 INFO L87 Difference]: Start difference. First operand 3341 states and 14832 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 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) [2021-06-12 20:36:07,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:07,746 INFO L93 Difference]: Finished difference Result 4165 states and 17900 transitions. [2021-06-12 20:36:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:36:07,746 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 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 28 [2021-06-12 20:36:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:07,755 INFO L225 Difference]: With dead ends: 4165 [2021-06-12 20:36:07,755 INFO L226 Difference]: Without dead ends: 4165 [2021-06-12 20:36:07,755 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:36:07,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-06-12 20:36:07,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 3293. [2021-06-12 20:36:07,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3293 states, 3292 states have (on average 4.427703523693803) internal successors, (14576), 3292 states have internal predecessors, (14576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:07,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 14576 transitions. [2021-06-12 20:36:07,807 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 14576 transitions. Word has length 28 [2021-06-12 20:36:07,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:07,807 INFO L482 AbstractCegarLoop]: Abstraction has 3293 states and 14576 transitions. [2021-06-12 20:36:07,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 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) [2021-06-12 20:36:07,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 14576 transitions. [2021-06-12 20:36:07,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:07,813 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:07,813 INFO L472 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] [2021-06-12 20:36:08,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:08,013 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:08,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:08,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1040039817, now seen corresponding path program 31 times [2021-06-12 20:36:08,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:08,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246202045] [2021-06-12 20:36:08,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:08,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:08,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246202045] [2021-06-12 20:36:08,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246202045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:08,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267865917] [2021-06-12 20:36:08,037 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 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 [2021-06-12 20:36:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:08,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:08,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:08,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267865917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:08,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:08,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:36:08,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614494425] [2021-06-12 20:36:08,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:08,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:08,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:08,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:08,127 INFO L87 Difference]: Start difference. First operand 3293 states and 14576 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-06-12 20:36:08,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:08,363 INFO L93 Difference]: Finished difference Result 6120 states and 24890 transitions. [2021-06-12 20:36:08,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:36:08,363 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 28 [2021-06-12 20:36:08,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:08,374 INFO L225 Difference]: With dead ends: 6120 [2021-06-12 20:36:08,374 INFO L226 Difference]: Without dead ends: 6031 [2021-06-12 20:36:08,374 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:36:08,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6031 states. [2021-06-12 20:36:08,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6031 to 3429. [2021-06-12 20:36:08,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 4.4518669778296385) internal successors, (15261), 3428 states have internal predecessors, (15261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:08,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 15261 transitions. [2021-06-12 20:36:08,468 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 15261 transitions. Word has length 28 [2021-06-12 20:36:08,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:08,468 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 15261 transitions. [2021-06-12 20:36:08,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-06-12 20:36:08,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 15261 transitions. [2021-06-12 20:36:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:08,475 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:08,475 INFO L472 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] [2021-06-12 20:36:08,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:08,689 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:08,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:08,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1402272981, now seen corresponding path program 32 times [2021-06-12 20:36:08,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:08,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902362241] [2021-06-12 20:36:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:08,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:08,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902362241] [2021-06-12 20:36:08,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902362241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:08,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186998623] [2021-06-12 20:36:08,715 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 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 [2021-06-12 20:36:08,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:08,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:08,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:08,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:08,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186998623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:08,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:08,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:36:08,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028904056] [2021-06-12 20:36:08,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:08,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:08,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:08,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:08,807 INFO L87 Difference]: Start difference. First operand 3429 states and 15261 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 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) [2021-06-12 20:36:08,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:08,984 INFO L93 Difference]: Finished difference Result 5654 states and 23169 transitions. [2021-06-12 20:36:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:36:08,985 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 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 28 [2021-06-12 20:36:08,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:08,995 INFO L225 Difference]: With dead ends: 5654 [2021-06-12 20:36:08,995 INFO L226 Difference]: Without dead ends: 5416 [2021-06-12 20:36:08,995 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:36:09,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5416 states. [2021-06-12 20:36:09,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5416 to 3560. [2021-06-12 20:36:09,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3560 states, 3559 states have (on average 4.421747681933128) internal successors, (15737), 3559 states have internal predecessors, (15737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:09,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3560 states to 3560 states and 15737 transitions. [2021-06-12 20:36:09,075 INFO L78 Accepts]: Start accepts. Automaton has 3560 states and 15737 transitions. Word has length 28 [2021-06-12 20:36:09,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:09,075 INFO L482 AbstractCegarLoop]: Abstraction has 3560 states and 15737 transitions. [2021-06-12 20:36:09,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 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) [2021-06-12 20:36:09,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3560 states and 15737 transitions. [2021-06-12 20:36:09,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:09,081 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:09,081 INFO L472 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] [2021-06-12 20:36:09,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-12 20:36:09,281 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:09,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:09,281 INFO L82 PathProgramCache]: Analyzing trace with hash -952871293, now seen corresponding path program 33 times [2021-06-12 20:36:09,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:09,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713801226] [2021-06-12 20:36:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:09,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:09,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713801226] [2021-06-12 20:36:09,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713801226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:09,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476444654] [2021-06-12 20:36:09,301 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 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 [2021-06-12 20:36:09,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:36:09,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:09,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:09,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:09,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476444654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:09,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:09,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:36:09,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925868108] [2021-06-12 20:36:09,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:09,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:09,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:09,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:09,390 INFO L87 Difference]: Start difference. First operand 3560 states and 15737 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:09,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:09,613 INFO L93 Difference]: Finished difference Result 4955 states and 20688 transitions. [2021-06-12 20:36:09,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:36:09,614 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 20:36:09,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:09,624 INFO L225 Difference]: With dead ends: 4955 [2021-06-12 20:36:09,624 INFO L226 Difference]: Without dead ends: 4857 [2021-06-12 20:36:09,625 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:36:09,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4857 states. [2021-06-12 20:36:09,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4857 to 3479. [2021-06-12 20:36:09,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 3478 states have (on average 4.4399079930994825) internal successors, (15442), 3478 states have internal predecessors, (15442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 15442 transitions. [2021-06-12 20:36:09,712 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 15442 transitions. Word has length 28 [2021-06-12 20:36:09,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:09,712 INFO L482 AbstractCegarLoop]: Abstraction has 3479 states and 15442 transitions. [2021-06-12 20:36:09,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:09,712 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 15442 transitions. [2021-06-12 20:36:09,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:09,718 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:09,719 INFO L472 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] [2021-06-12 20:36:09,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-12 20:36:09,919 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:09,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:09,919 INFO L82 PathProgramCache]: Analyzing trace with hash -121098667, now seen corresponding path program 34 times [2021-06-12 20:36:09,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:09,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911544414] [2021-06-12 20:36:09,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:09,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:09,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911544414] [2021-06-12 20:36:09,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911544414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:09,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956424813] [2021-06-12 20:36:09,947 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 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 [2021-06-12 20:36:09,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:36:09,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:09,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:09,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:10,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956424813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:10,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:10,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:36:10,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065429464] [2021-06-12 20:36:10,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:10,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:10,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:10,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:10,036 INFO L87 Difference]: Start difference. First operand 3479 states and 15442 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-06-12 20:36:10,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:10,190 INFO L93 Difference]: Finished difference Result 5688 states and 23360 transitions. [2021-06-12 20:36:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:36:10,190 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 28 [2021-06-12 20:36:10,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:10,200 INFO L225 Difference]: With dead ends: 5688 [2021-06-12 20:36:10,200 INFO L226 Difference]: Without dead ends: 5374 [2021-06-12 20:36:10,200 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:36:10,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5374 states. [2021-06-12 20:36:10,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5374 to 3228. [2021-06-12 20:36:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 4.4465447784319805) internal successors, (14349), 3227 states have internal predecessors, (14349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:10,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 14349 transitions. [2021-06-12 20:36:10,267 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 14349 transitions. Word has length 28 [2021-06-12 20:36:10,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:10,267 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 14349 transitions. [2021-06-12 20:36:10,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-06-12 20:36:10,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 14349 transitions. [2021-06-12 20:36:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:10,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:10,273 INFO L472 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] [2021-06-12 20:36:10,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-12 20:36:10,473 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:10,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:10,474 INFO L82 PathProgramCache]: Analyzing trace with hash 73354585, now seen corresponding path program 35 times [2021-06-12 20:36:10,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:10,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796161090] [2021-06-12 20:36:10,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:10,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:10,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796161090] [2021-06-12 20:36:10,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796161090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:10,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991189817] [2021-06-12 20:36:10,518 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 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 [2021-06-12 20:36:10,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:36:10,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:10,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:10,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:10,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991189817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:10,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:10,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 20:36:10,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879832265] [2021-06-12 20:36:10,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:36:10,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:10,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:36:10,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:36:10,617 INFO L87 Difference]: Start difference. First operand 3228 states and 14349 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:10,736 INFO L93 Difference]: Finished difference Result 3905 states and 17063 transitions. [2021-06-12 20:36:10,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:36:10,736 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 20:36:10,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:10,744 INFO L225 Difference]: With dead ends: 3905 [2021-06-12 20:36:10,744 INFO L226 Difference]: Without dead ends: 3862 [2021-06-12 20:36:10,744 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:36:10,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-06-12 20:36:10,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 3217. [2021-06-12 20:36:10,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3217 states, 3216 states have (on average 4.453980099502488) internal successors, (14324), 3216 states have internal predecessors, (14324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:10,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3217 states to 3217 states and 14324 transitions. [2021-06-12 20:36:10,826 INFO L78 Accepts]: Start accepts. Automaton has 3217 states and 14324 transitions. Word has length 28 [2021-06-12 20:36:10,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:10,826 INFO L482 AbstractCegarLoop]: Abstraction has 3217 states and 14324 transitions. [2021-06-12 20:36:10,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:10,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3217 states and 14324 transitions. [2021-06-12 20:36:10,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:10,832 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:10,833 INFO L472 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] [2021-06-12 20:36:11,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:11,033 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:11,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:11,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1068507869, now seen corresponding path program 36 times [2021-06-12 20:36:11,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:11,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135836775] [2021-06-12 20:36:11,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:11,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:11,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135836775] [2021-06-12 20:36:11,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135836775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:11,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370949791] [2021-06-12 20:36:11,056 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 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 [2021-06-12 20:36:11,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:36:11,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:11,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:11,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:11,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:11,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370949791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:11,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:11,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 20:36:11,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84325487] [2021-06-12 20:36:11,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:36:11,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:11,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:36:11,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:36:11,148 INFO L87 Difference]: Start difference. First operand 3217 states and 14324 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2021-06-12 20:36:11,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:11,239 INFO L93 Difference]: Finished difference Result 4261 states and 18540 transitions. [2021-06-12 20:36:11,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:36:11,240 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 28 [2021-06-12 20:36:11,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:11,249 INFO L225 Difference]: With dead ends: 4261 [2021-06-12 20:36:11,249 INFO L226 Difference]: Without dead ends: 4261 [2021-06-12 20:36:11,249 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:36:11,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-06-12 20:36:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 3247. [2021-06-12 20:36:11,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3247 states, 3246 states have (on average 4.457486136783734) internal successors, (14469), 3246 states have internal predecessors, (14469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:11,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3247 states to 3247 states and 14469 transitions. [2021-06-12 20:36:11,317 INFO L78 Accepts]: Start accepts. Automaton has 3247 states and 14469 transitions. Word has length 28 [2021-06-12 20:36:11,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:11,317 INFO L482 AbstractCegarLoop]: Abstraction has 3247 states and 14469 transitions. [2021-06-12 20:36:11,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2021-06-12 20:36:11,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3247 states and 14469 transitions. [2021-06-12 20:36:11,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:11,322 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:11,322 INFO L472 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] [2021-06-12 20:36:11,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-12 20:36:11,524 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:11,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:11,525 INFO L82 PathProgramCache]: Analyzing trace with hash 32724757, now seen corresponding path program 37 times [2021-06-12 20:36:11,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:11,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107214232] [2021-06-12 20:36:11,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:11,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:11,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107214232] [2021-06-12 20:36:11,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107214232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:11,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898263259] [2021-06-12 20:36:11,546 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 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 [2021-06-12 20:36:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:11,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:11,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:11,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:11,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898263259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:11,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:11,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 20:36:11,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119566070] [2021-06-12 20:36:11,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:36:11,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:11,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:36:11,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:36:11,642 INFO L87 Difference]: Start difference. First operand 3247 states and 14469 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2021-06-12 20:36:11,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:11,897 INFO L93 Difference]: Finished difference Result 5371 states and 22050 transitions. [2021-06-12 20:36:11,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:36:11,897 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 28 [2021-06-12 20:36:11,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:11,907 INFO L225 Difference]: With dead ends: 5371 [2021-06-12 20:36:11,907 INFO L226 Difference]: Without dead ends: 5194 [2021-06-12 20:36:11,907 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:36:11,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-06-12 20:36:11,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 3332. [2021-06-12 20:36:11,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3331 states have (on average 4.473431401981387) internal successors, (14901), 3331 states have internal predecessors, (14901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:11,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 14901 transitions. [2021-06-12 20:36:11,970 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 14901 transitions. Word has length 28 [2021-06-12 20:36:11,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:11,970 INFO L482 AbstractCegarLoop]: Abstraction has 3332 states and 14901 transitions. [2021-06-12 20:36:11,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2021-06-12 20:36:11,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 14901 transitions. [2021-06-12 20:36:11,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:11,976 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:11,976 INFO L472 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] [2021-06-12 20:36:12,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:12,176 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:12,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:12,177 INFO L82 PathProgramCache]: Analyzing trace with hash -473896811, now seen corresponding path program 38 times [2021-06-12 20:36:12,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:12,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653464104] [2021-06-12 20:36:12,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:12,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:12,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653464104] [2021-06-12 20:36:12,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653464104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:12,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840238177] [2021-06-12 20:36:12,218 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 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 [2021-06-12 20:36:12,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:12,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:12,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:12,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:12,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840238177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:12,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:12,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 20:36:12,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559744472] [2021-06-12 20:36:12,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:36:12,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:12,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:36:12,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:36:12,342 INFO L87 Difference]: Start difference. First operand 3332 states and 14901 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 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) [2021-06-12 20:36:12,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:12,574 INFO L93 Difference]: Finished difference Result 4983 states and 20920 transitions. [2021-06-12 20:36:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:36:12,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 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 28 [2021-06-12 20:36:12,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:12,586 INFO L225 Difference]: With dead ends: 4983 [2021-06-12 20:36:12,587 INFO L226 Difference]: Without dead ends: 4684 [2021-06-12 20:36:12,588 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:36:12,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2021-06-12 20:36:12,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 3540. [2021-06-12 20:36:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 3539 states have (on average 4.495620231703871) internal successors, (15910), 3539 states have internal predecessors, (15910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:12,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 15910 transitions. [2021-06-12 20:36:12,678 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 15910 transitions. Word has length 28 [2021-06-12 20:36:12,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:12,678 INFO L482 AbstractCegarLoop]: Abstraction has 3540 states and 15910 transitions. [2021-06-12 20:36:12,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 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) [2021-06-12 20:36:12,678 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 15910 transitions. [2021-06-12 20:36:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:12,686 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:12,686 INFO L472 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] [2021-06-12 20:36:12,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-12 20:36:12,910 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:12,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:12,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1340354023, now seen corresponding path program 39 times [2021-06-12 20:36:12,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:12,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343418393] [2021-06-12 20:36:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:12,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:12,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343418393] [2021-06-12 20:36:12,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343418393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:12,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982625857] [2021-06-12 20:36:12,927 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 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 [2021-06-12 20:36:12,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:36:12,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:12,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:12,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:13,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982625857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:13,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:13,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 20:36:13,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850684528] [2021-06-12 20:36:13,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:13,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:13,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:13,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:13,023 INFO L87 Difference]: Start difference. First operand 3540 states and 15910 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-06-12 20:36:13,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:13,230 INFO L93 Difference]: Finished difference Result 4609 states and 19684 transitions. [2021-06-12 20:36:13,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:36:13,230 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 28 [2021-06-12 20:36:13,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:13,239 INFO L225 Difference]: With dead ends: 4609 [2021-06-12 20:36:13,239 INFO L226 Difference]: Without dead ends: 4511 [2021-06-12 20:36:13,239 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:36:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-06-12 20:36:13,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3315. [2021-06-12 20:36:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 4.492757996378998) internal successors, (14889), 3314 states have internal predecessors, (14889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 14889 transitions. [2021-06-12 20:36:13,295 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 14889 transitions. Word has length 28 [2021-06-12 20:36:13,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:13,296 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 14889 transitions. [2021-06-12 20:36:13,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-06-12 20:36:13,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 14889 transitions. [2021-06-12 20:36:13,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:13,301 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:13,301 INFO L472 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] [2021-06-12 20:36:13,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:13,501 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:13,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:13,501 INFO L82 PathProgramCache]: Analyzing trace with hash -508581397, now seen corresponding path program 40 times [2021-06-12 20:36:13,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:13,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470890074] [2021-06-12 20:36:13,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:13,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:13,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470890074] [2021-06-12 20:36:13,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470890074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:13,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405553478] [2021-06-12 20:36:13,518 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 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 [2021-06-12 20:36:13,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:36:13,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:13,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:13,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405553478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:13,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:13,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 20:36:13,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585610697] [2021-06-12 20:36:13,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:13,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:13,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:13,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:13,613 INFO L87 Difference]: Start difference. First operand 3315 states and 14889 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-06-12 20:36:13,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:13,773 INFO L93 Difference]: Finished difference Result 6217 states and 25682 transitions. [2021-06-12 20:36:13,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:36:13,774 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 28 [2021-06-12 20:36:13,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:13,785 INFO L225 Difference]: With dead ends: 6217 [2021-06-12 20:36:13,785 INFO L226 Difference]: Without dead ends: 5965 [2021-06-12 20:36:13,785 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:36:13,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5965 states. [2021-06-12 20:36:13,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5965 to 3606. [2021-06-12 20:36:13,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 4.471844660194175) internal successors, (16121), 3605 states have internal predecessors, (16121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:13,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 16121 transitions. [2021-06-12 20:36:13,861 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 16121 transitions. Word has length 28 [2021-06-12 20:36:13,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:13,861 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 16121 transitions. [2021-06-12 20:36:13,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-06-12 20:36:13,861 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 16121 transitions. [2021-06-12 20:36:13,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:13,866 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:13,866 INFO L472 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] [2021-06-12 20:36:14,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:14,067 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:14,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:14,067 INFO L82 PathProgramCache]: Analyzing trace with hash 436881771, now seen corresponding path program 41 times [2021-06-12 20:36:14,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:14,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023628266] [2021-06-12 20:36:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:14,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:14,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023628266] [2021-06-12 20:36:14,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023628266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:14,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110074405] [2021-06-12 20:36:14,100 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 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 [2021-06-12 20:36:14,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:36:14,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:14,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:14,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:14,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110074405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:14,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:14,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 20:36:14,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444268418] [2021-06-12 20:36:14,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:14,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:14,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:14,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:14,225 INFO L87 Difference]: Start difference. First operand 3606 states and 16121 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-06-12 20:36:14,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:14,428 INFO L93 Difference]: Finished difference Result 5105 states and 21497 transitions. [2021-06-12 20:36:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:36:14,428 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 28 [2021-06-12 20:36:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:14,438 INFO L225 Difference]: With dead ends: 5105 [2021-06-12 20:36:14,438 INFO L226 Difference]: Without dead ends: 5016 [2021-06-12 20:36:14,438 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:36:14,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5016 states. [2021-06-12 20:36:14,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5016 to 3555. [2021-06-12 20:36:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3555 states, 3554 states have (on average 4.498030388294879) internal successors, (15986), 3554 states have internal predecessors, (15986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:14,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 15986 transitions. [2021-06-12 20:36:14,501 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 15986 transitions. Word has length 28 [2021-06-12 20:36:14,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:14,501 INFO L482 AbstractCegarLoop]: Abstraction has 3555 states and 15986 transitions. [2021-06-12 20:36:14,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-06-12 20:36:14,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 15986 transitions. [2021-06-12 20:36:14,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:14,507 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:14,507 INFO L472 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] [2021-06-12 20:36:14,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-12 20:36:14,720 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:14,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:14,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1415772727, now seen corresponding path program 42 times [2021-06-12 20:36:14,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:14,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36075677] [2021-06-12 20:36:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:14,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:14,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36075677] [2021-06-12 20:36:14,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36075677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:14,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217563107] [2021-06-12 20:36:14,738 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 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 [2021-06-12 20:36:14,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:36:14,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:14,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:14,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:14,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217563107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:14,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:14,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 20:36:14,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075573619] [2021-06-12 20:36:14,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:14,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:14,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:14,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:14,844 INFO L87 Difference]: Start difference. First operand 3555 states and 15986 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 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) [2021-06-12 20:36:15,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:15,001 INFO L93 Difference]: Finished difference Result 6625 states and 28035 transitions. [2021-06-12 20:36:15,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:36:15,001 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 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 28 [2021-06-12 20:36:15,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:15,014 INFO L225 Difference]: With dead ends: 6625 [2021-06-12 20:36:15,015 INFO L226 Difference]: Without dead ends: 6387 [2021-06-12 20:36:15,015 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:36:15,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6387 states. [2021-06-12 20:36:15,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6387 to 4277. [2021-06-12 20:36:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4277 states, 4276 states have (on average 4.543966323666979) internal successors, (19430), 4276 states have internal predecessors, (19430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:15,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4277 states to 4277 states and 19430 transitions. [2021-06-12 20:36:15,100 INFO L78 Accepts]: Start accepts. Automaton has 4277 states and 19430 transitions. Word has length 28 [2021-06-12 20:36:15,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:15,100 INFO L482 AbstractCegarLoop]: Abstraction has 4277 states and 19430 transitions. [2021-06-12 20:36:15,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 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) [2021-06-12 20:36:15,100 INFO L276 IsEmpty]: Start isEmpty. Operand 4277 states and 19430 transitions. [2021-06-12 20:36:15,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:15,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:15,107 INFO L472 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] [2021-06-12 20:36:15,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:15,307 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:15,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:15,308 INFO L82 PathProgramCache]: Analyzing trace with hash 524050295, now seen corresponding path program 43 times [2021-06-12 20:36:15,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:15,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822473937] [2021-06-12 20:36:15,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:36:15,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:15,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822473937] [2021-06-12 20:36:15,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822473937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:15,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212920687] [2021-06-12 20:36:15,324 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 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 [2021-06-12 20:36:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:15,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:15,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:15,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212920687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:15,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:15,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 20:36:15,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257923767] [2021-06-12 20:36:15,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:15,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:15,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:15,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:15,428 INFO L87 Difference]: Start difference. First operand 4277 states and 19430 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-06-12 20:36:15,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:15,648 INFO L93 Difference]: Finished difference Result 6394 states and 27162 transitions. [2021-06-12 20:36:15,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:36:15,648 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 28 [2021-06-12 20:36:15,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:15,660 INFO L225 Difference]: With dead ends: 6394 [2021-06-12 20:36:15,660 INFO L226 Difference]: Without dead ends: 6243 [2021-06-12 20:36:15,661 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:36:15,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6243 states. [2021-06-12 20:36:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6243 to 3807. [2021-06-12 20:36:15,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3807 states, 3806 states have (on average 4.512348922753547) internal successors, (17174), 3806 states have internal predecessors, (17174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:15,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3807 states to 3807 states and 17174 transitions. [2021-06-12 20:36:15,745 INFO L78 Accepts]: Start accepts. Automaton has 3807 states and 17174 transitions. Word has length 28 [2021-06-12 20:36:15,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:15,745 INFO L482 AbstractCegarLoop]: Abstraction has 3807 states and 17174 transitions. [2021-06-12 20:36:15,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-06-12 20:36:15,745 INFO L276 IsEmpty]: Start isEmpty. Operand 3807 states and 17174 transitions. [2021-06-12 20:36:15,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:15,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:15,752 INFO L472 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] [2021-06-12 20:36:15,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:15,952 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:15,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:15,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1936655961, now seen corresponding path program 44 times [2021-06-12 20:36:15,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:15,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662614723] [2021-06-12 20:36:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:15,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:15,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662614723] [2021-06-12 20:36:15,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662614723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:15,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123580406] [2021-06-12 20:36:15,993 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 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 [2021-06-12 20:36:16,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:16,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:16,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:16,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:16,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123580406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:16,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:16,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 20:36:16,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229161347] [2021-06-12 20:36:16,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:36:16,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:16,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:36:16,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:36:16,095 INFO L87 Difference]: Start difference. First operand 3807 states and 17174 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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) [2021-06-12 20:36:16,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:16,332 INFO L93 Difference]: Finished difference Result 5996 states and 25523 transitions. [2021-06-12 20:36:16,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:36:16,333 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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 28 [2021-06-12 20:36:16,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:16,345 INFO L225 Difference]: With dead ends: 5996 [2021-06-12 20:36:16,345 INFO L226 Difference]: Without dead ends: 5915 [2021-06-12 20:36:16,345 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:36:16,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-06-12 20:36:16,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 3582. [2021-06-12 20:36:16,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3582 states, 3581 states have (on average 4.499301870985758) internal successors, (16112), 3581 states have internal predecessors, (16112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:16,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3582 states to 3582 states and 16112 transitions. [2021-06-12 20:36:16,423 INFO L78 Accepts]: Start accepts. Automaton has 3582 states and 16112 transitions. Word has length 28 [2021-06-12 20:36:16,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:16,423 INFO L482 AbstractCegarLoop]: Abstraction has 3582 states and 16112 transitions. [2021-06-12 20:36:16,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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) [2021-06-12 20:36:16,423 INFO L276 IsEmpty]: Start isEmpty. Operand 3582 states and 16112 transitions. [2021-06-12 20:36:16,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:16,429 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:16,429 INFO L472 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] [2021-06-12 20:36:16,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-12 20:36:16,630 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:16,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:16,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1708748389, now seen corresponding path program 45 times [2021-06-12 20:36:16,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:16,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54520358] [2021-06-12 20:36:16,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:16,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:16,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54520358] [2021-06-12 20:36:16,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54520358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:16,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334089533] [2021-06-12 20:36:16,650 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 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 [2021-06-12 20:36:16,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:36:16,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:16,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:16,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:16,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334089533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:16,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:16,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:36:16,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068717527] [2021-06-12 20:36:16,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:16,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:16,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:16,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:16,742 INFO L87 Difference]: Start difference. First operand 3582 states and 16112 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-06-12 20:36:16,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:16,966 INFO L93 Difference]: Finished difference Result 6117 states and 25799 transitions. [2021-06-12 20:36:16,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:36:16,967 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 28 [2021-06-12 20:36:16,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:16,978 INFO L225 Difference]: With dead ends: 6117 [2021-06-12 20:36:16,978 INFO L226 Difference]: Without dead ends: 6028 [2021-06-12 20:36:16,979 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:36:17,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6028 states. [2021-06-12 20:36:17,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6028 to 3578. [2021-06-12 20:36:17,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 4.48616158792284) internal successors, (16047), 3577 states have internal predecessors, (16047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 16047 transitions. [2021-06-12 20:36:17,082 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 16047 transitions. Word has length 28 [2021-06-12 20:36:17,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:17,082 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 16047 transitions. [2021-06-12 20:36:17,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-06-12 20:36:17,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 16047 transitions. [2021-06-12 20:36:17,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:17,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:17,087 INFO L472 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] [2021-06-12 20:36:17,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-12 20:36:17,288 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:17,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:17,288 INFO L82 PathProgramCache]: Analyzing trace with hash 733564409, now seen corresponding path program 46 times [2021-06-12 20:36:17,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:17,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969916298] [2021-06-12 20:36:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:17,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:17,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969916298] [2021-06-12 20:36:17,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969916298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:17,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139417725] [2021-06-12 20:36:17,311 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 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 [2021-06-12 20:36:17,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:36:17,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:17,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:17,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:17,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139417725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:17,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:17,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:36:17,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818377549] [2021-06-12 20:36:17,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:17,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:17,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:17,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:17,415 INFO L87 Difference]: Start difference. First operand 3578 states and 16047 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 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) [2021-06-12 20:36:17,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:17,634 INFO L93 Difference]: Finished difference Result 7695 states and 32562 transitions. [2021-06-12 20:36:17,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:36:17,635 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 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 28 [2021-06-12 20:36:17,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:17,651 INFO L225 Difference]: With dead ends: 7695 [2021-06-12 20:36:17,651 INFO L226 Difference]: Without dead ends: 7457 [2021-06-12 20:36:17,651 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:36:17,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7457 states. [2021-06-12 20:36:17,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7457 to 3898. [2021-06-12 20:36:17,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3898 states, 3897 states have (on average 4.497818835001283) internal successors, (17528), 3897 states have internal predecessors, (17528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3898 states to 3898 states and 17528 transitions. [2021-06-12 20:36:17,746 INFO L78 Accepts]: Start accepts. Automaton has 3898 states and 17528 transitions. Word has length 28 [2021-06-12 20:36:17,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:17,746 INFO L482 AbstractCegarLoop]: Abstraction has 3898 states and 17528 transitions. [2021-06-12 20:36:17,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 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) [2021-06-12 20:36:17,746 INFO L276 IsEmpty]: Start isEmpty. Operand 3898 states and 17528 transitions. [2021-06-12 20:36:17,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:17,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:17,753 INFO L472 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] [2021-06-12 20:36:17,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-12 20:36:17,953 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:17,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:17,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1621579865, now seen corresponding path program 47 times [2021-06-12 20:36:17,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:17,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951712794] [2021-06-12 20:36:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:17,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:17,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951712794] [2021-06-12 20:36:17,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951712794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:17,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949158156] [2021-06-12 20:36:17,975 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 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 [2021-06-12 20:36:18,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:18,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:18,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:18,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:18,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949158156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:18,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:18,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:36:18,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031702747] [2021-06-12 20:36:18,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:18,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:18,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:18,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:18,065 INFO L87 Difference]: Start difference. First operand 3898 states and 17528 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:18,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:18,312 INFO L93 Difference]: Finished difference Result 7529 states and 31905 transitions. [2021-06-12 20:36:18,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:36:18,312 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 20:36:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:18,329 INFO L225 Difference]: With dead ends: 7529 [2021-06-12 20:36:18,329 INFO L226 Difference]: Without dead ends: 7378 [2021-06-12 20:36:18,329 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:36:18,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2021-06-12 20:36:18,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 3667. [2021-06-12 20:36:18,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3667 states, 3666 states have (on average 4.480087288597927) internal successors, (16424), 3666 states have internal predecessors, (16424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:18,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3667 states to 3667 states and 16424 transitions. [2021-06-12 20:36:18,466 INFO L78 Accepts]: Start accepts. Automaton has 3667 states and 16424 transitions. Word has length 28 [2021-06-12 20:36:18,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:18,466 INFO L482 AbstractCegarLoop]: Abstraction has 3667 states and 16424 transitions. [2021-06-12 20:36:18,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:18,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3667 states and 16424 transitions. [2021-06-12 20:36:18,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:18,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:18,473 INFO L472 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] [2021-06-12 20:36:18,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:18,674 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:18,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:18,674 INFO L82 PathProgramCache]: Analyzing trace with hash -789807239, now seen corresponding path program 48 times [2021-06-12 20:36:18,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:18,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142152881] [2021-06-12 20:36:18,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:18,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:18,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142152881] [2021-06-12 20:36:18,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142152881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:18,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101716680] [2021-06-12 20:36:18,699 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 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 [2021-06-12 20:36:18,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:36:18,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:18,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:18,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:18,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101716680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:18,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:18,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:36:18,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036261546] [2021-06-12 20:36:18,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:18,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:18,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:18,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:18,794 INFO L87 Difference]: Start difference. First operand 3667 states and 16424 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-06-12 20:36:18,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:18,960 INFO L93 Difference]: Finished difference Result 5684 states and 23777 transitions. [2021-06-12 20:36:18,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:36:18,960 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 28 [2021-06-12 20:36:18,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:18,973 INFO L225 Difference]: With dead ends: 5684 [2021-06-12 20:36:18,973 INFO L226 Difference]: Without dead ends: 5684 [2021-06-12 20:36:18,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:36:18,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5684 states. [2021-06-12 20:36:19,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5684 to 3830. [2021-06-12 20:36:19,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3830 states, 3829 states have (on average 4.469051971794202) internal successors, (17112), 3829 states have internal predecessors, (17112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:19,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3830 states to 3830 states and 17112 transitions. [2021-06-12 20:36:19,049 INFO L78 Accepts]: Start accepts. Automaton has 3830 states and 17112 transitions. Word has length 28 [2021-06-12 20:36:19,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:19,049 INFO L482 AbstractCegarLoop]: Abstraction has 3830 states and 17112 transitions. [2021-06-12 20:36:19,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-06-12 20:36:19,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3830 states and 17112 transitions. [2021-06-12 20:36:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:19,055 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:19,055 INFO L472 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] [2021-06-12 20:36:19,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-12 20:36:19,256 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:19,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:19,256 INFO L82 PathProgramCache]: Analyzing trace with hash -208974199, now seen corresponding path program 49 times [2021-06-12 20:36:19,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:19,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182153240] [2021-06-12 20:36:19,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:19,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:19,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182153240] [2021-06-12 20:36:19,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182153240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:19,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532043661] [2021-06-12 20:36:19,277 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 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 [2021-06-12 20:36:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:19,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:19,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:19,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532043661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:19,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:19,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:36:19,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404925410] [2021-06-12 20:36:19,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:36:19,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:19,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:36:19,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:36:19,374 INFO L87 Difference]: Start difference. First operand 3830 states and 17112 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:19,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:19,581 INFO L93 Difference]: Finished difference Result 5383 states and 22901 transitions. [2021-06-12 20:36:19,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:36:19,582 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 20:36:19,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:19,592 INFO L225 Difference]: With dead ends: 5383 [2021-06-12 20:36:19,592 INFO L226 Difference]: Without dead ends: 5301 [2021-06-12 20:36:19,592 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:36:19,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-06-12 20:36:19,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 3809. [2021-06-12 20:36:19,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3809 states, 3808 states have (on average 4.473214285714286) internal successors, (17034), 3808 states have internal predecessors, (17034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:19,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3809 states to 3809 states and 17034 transitions. [2021-06-12 20:36:19,660 INFO L78 Accepts]: Start accepts. Automaton has 3809 states and 17034 transitions. Word has length 28 [2021-06-12 20:36:19,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:19,660 INFO L482 AbstractCegarLoop]: Abstraction has 3809 states and 17034 transitions. [2021-06-12 20:36:19,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:19,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3809 states and 17034 transitions. [2021-06-12 20:36:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:19,666 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:19,666 INFO L472 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] [2021-06-12 20:36:19,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:19,889 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:19,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:19,889 INFO L82 PathProgramCache]: Analyzing trace with hash 23729685, now seen corresponding path program 50 times [2021-06-12 20:36:19,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:19,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669742370] [2021-06-12 20:36:19,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:19,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:19,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669742370] [2021-06-12 20:36:19,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669742370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:19,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839719727] [2021-06-12 20:36:19,913 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 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 [2021-06-12 20:36:19,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:19,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:19,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:19,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:20,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839719727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:20,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:20,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 20:36:20,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959867654] [2021-06-12 20:36:20,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:36:20,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:20,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:36:20,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:36:20,030 INFO L87 Difference]: Start difference. First operand 3809 states and 17034 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:20,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:20,123 INFO L93 Difference]: Finished difference Result 4345 states and 19174 transitions. [2021-06-12 20:36:20,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:36:20,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 20:36:20,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:20,131 INFO L225 Difference]: With dead ends: 4345 [2021-06-12 20:36:20,131 INFO L226 Difference]: Without dead ends: 4282 [2021-06-12 20:36:20,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:36:20,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2021-06-12 20:36:20,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 3786. [2021-06-12 20:36:20,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3786 states, 3785 states have (on average 4.484808454425363) internal successors, (16975), 3785 states have internal predecessors, (16975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:20,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3786 states to 3786 states and 16975 transitions. [2021-06-12 20:36:20,217 INFO L78 Accepts]: Start accepts. Automaton has 3786 states and 16975 transitions. Word has length 28 [2021-06-12 20:36:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:20,217 INFO L482 AbstractCegarLoop]: Abstraction has 3786 states and 16975 transitions. [2021-06-12 20:36:20,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:20,217 INFO L276 IsEmpty]: Start isEmpty. Operand 3786 states and 16975 transitions. [2021-06-12 20:36:20,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:36:20,222 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:20,222 INFO L472 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] [2021-06-12 20:36:20,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:20,424 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:20,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:20,424 INFO L82 PathProgramCache]: Analyzing trace with hash 881575195, now seen corresponding path program 51 times [2021-06-12 20:36:20,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:20,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080735707] [2021-06-12 20:36:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:20,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:20,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080735707] [2021-06-12 20:36:20,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080735707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:20,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380520864] [2021-06-12 20:36:20,446 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 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 [2021-06-12 20:36:20,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:36:20,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:20,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:36:20,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:20,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380520864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:20,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:20,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 20:36:20,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430567772] [2021-06-12 20:36:20,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:36:20,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:20,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:36:20,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:36:20,529 INFO L87 Difference]: Start difference. First operand 3786 states and 16975 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:20,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:20,629 INFO L93 Difference]: Finished difference Result 4570 states and 20136 transitions. [2021-06-12 20:36:20,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:36:20,630 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 20:36:20,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:20,639 INFO L225 Difference]: With dead ends: 4570 [2021-06-12 20:36:20,639 INFO L226 Difference]: Without dead ends: 4570 [2021-06-12 20:36:20,639 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:36:20,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4570 states. [2021-06-12 20:36:20,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4570 to 3804. [2021-06-12 20:36:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 4.494083618196161) internal successors, (17091), 3803 states have internal predecessors, (17091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:20,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 17091 transitions. [2021-06-12 20:36:20,698 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 17091 transitions. Word has length 28 [2021-06-12 20:36:20,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:20,698 INFO L482 AbstractCegarLoop]: Abstraction has 3804 states and 17091 transitions. [2021-06-12 20:36:20,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 17091 transitions. [2021-06-12 20:36:20,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:36:20,704 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:20,704 INFO L472 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] [2021-06-12 20:36:20,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:20,909 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:20,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:20,909 INFO L82 PathProgramCache]: Analyzing trace with hash 451443930, now seen corresponding path program 52 times [2021-06-12 20:36:20,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:20,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950845516] [2021-06-12 20:36:20,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:21,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:21,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950845516] [2021-06-12 20:36:21,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950845516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:21,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408323799] [2021-06-12 20:36:21,102 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 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 [2021-06-12 20:36:21,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:36:21,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:21,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:36:21,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:21,295 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 [2021-06-12 20:36:21,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:21,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:21,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:21,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:36:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:21,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408323799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:21,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:21,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:36:21,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855185885] [2021-06-12 20:36:21,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:36:21,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:21,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:36:21,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:36:21,336 INFO L87 Difference]: Start difference. First operand 3804 states and 17091 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-06-12 20:36:22,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:22,587 INFO L93 Difference]: Finished difference Result 5745 states and 25057 transitions. [2021-06-12 20:36:22,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:36:22,587 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 30 [2021-06-12 20:36:22,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:22,599 INFO L225 Difference]: With dead ends: 5745 [2021-06-12 20:36:22,599 INFO L226 Difference]: Without dead ends: 5664 [2021-06-12 20:36:22,600 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 787.3ms TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:36:22,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5664 states. [2021-06-12 20:36:22,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5664 to 3903. [2021-06-12 20:36:22,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.478728856996412) internal successors, (17476), 3902 states have internal predecessors, (17476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:22,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 17476 transitions. [2021-06-12 20:36:22,676 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 17476 transitions. Word has length 30 [2021-06-12 20:36:22,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:22,676 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 17476 transitions. [2021-06-12 20:36:22,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-06-12 20:36:22,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 17476 transitions. [2021-06-12 20:36:22,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:36:22,683 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:22,683 INFO L472 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] [2021-06-12 20:36:22,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:22,885 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:22,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:22,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1756183324, now seen corresponding path program 1 times [2021-06-12 20:36:22,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:22,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649029396] [2021-06-12 20:36:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:23,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:23,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:23,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649029396] [2021-06-12 20:36:23,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649029396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:23,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402546434] [2021-06-12 20:36:23,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-12 20:36:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:23,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:36:23,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:23,243 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 [2021-06-12 20:36:23,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:23,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:23,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:23,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:36:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:23,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402546434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:23,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:23,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:36:23,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946397750] [2021-06-12 20:36:23,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:36:23,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:23,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:36:23,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:36:23,283 INFO L87 Difference]: Start difference. First operand 3903 states and 17476 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:36:24,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:24,426 INFO L93 Difference]: Finished difference Result 5395 states and 23651 transitions. [2021-06-12 20:36:24,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:36:24,426 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 30 [2021-06-12 20:36:24,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:24,436 INFO L225 Difference]: With dead ends: 5395 [2021-06-12 20:36:24,436 INFO L226 Difference]: Without dead ends: 5314 [2021-06-12 20:36:24,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 789.4ms TimeCoverageRelationStatistics Valid=294, Invalid=1512, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:36:24,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5314 states. [2021-06-12 20:36:24,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5314 to 3889. [2021-06-12 20:36:24,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3889 states, 3888 states have (on average 4.484310699588478) internal successors, (17435), 3888 states have internal predecessors, (17435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:24,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3889 states to 3889 states and 17435 transitions. [2021-06-12 20:36:24,503 INFO L78 Accepts]: Start accepts. Automaton has 3889 states and 17435 transitions. Word has length 30 [2021-06-12 20:36:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:24,504 INFO L482 AbstractCegarLoop]: Abstraction has 3889 states and 17435 transitions. [2021-06-12 20:36:24,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:36:24,504 INFO L276 IsEmpty]: Start isEmpty. Operand 3889 states and 17435 transitions. [2021-06-12 20:36:24,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:36:24,510 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:24,510 INFO L472 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] [2021-06-12 20:36:24,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:24,710 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:24,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:24,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1101128566, now seen corresponding path program 2 times [2021-06-12 20:36:24,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:24,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186889710] [2021-06-12 20:36:24,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:24,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:24,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186889710] [2021-06-12 20:36:24,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186889710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:24,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848168037] [2021-06-12 20:36:24,930 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 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 [2021-06-12 20:36:24,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:24,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:24,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:36:24,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:25,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:36:25,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:25,183 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 [2021-06-12 20:36:25,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:25,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:25,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:25,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:9 [2021-06-12 20:36:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:25,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848168037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:25,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:25,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:36:25,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119666158] [2021-06-12 20:36:25,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:36:25,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:25,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:36:25,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:36:25,262 INFO L87 Difference]: Start difference. First operand 3889 states and 17435 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-06-12 20:36:26,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:26,571 INFO L93 Difference]: Finished difference Result 5211 states and 22782 transitions. [2021-06-12 20:36:26,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:36:26,571 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 30 [2021-06-12 20:36:26,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:26,581 INFO L225 Difference]: With dead ends: 5211 [2021-06-12 20:36:26,582 INFO L226 Difference]: Without dead ends: 5130 [2021-06-12 20:36:26,582 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 948.2ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:36:26,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5130 states. [2021-06-12 20:36:26,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5130 to 3899. [2021-06-12 20:36:26,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3898 states have (on average 4.482555156490508) internal successors, (17473), 3898 states have internal predecessors, (17473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 17473 transitions. [2021-06-12 20:36:26,650 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 17473 transitions. Word has length 30 [2021-06-12 20:36:26,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:26,651 INFO L482 AbstractCegarLoop]: Abstraction has 3899 states and 17473 transitions. [2021-06-12 20:36:26,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-06-12 20:36:26,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 17473 transitions. [2021-06-12 20:36:26,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:36:26,657 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:26,657 INFO L472 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] [2021-06-12 20:36:26,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-12 20:36:26,857 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:26,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:26,858 INFO L82 PathProgramCache]: Analyzing trace with hash 594782300, now seen corresponding path program 3 times [2021-06-12 20:36:26,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:26,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231093507] [2021-06-12 20:36:26,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:27,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:27,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231093507] [2021-06-12 20:36:27,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231093507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:27,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482890] [2021-06-12 20:36:27,029 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 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 [2021-06-12 20:36:27,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:36:27,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:27,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:36:27,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:27,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:36:27,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:27,253 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 [2021-06-12 20:36:27,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:27,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:27,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:27,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:9 [2021-06-12 20:36:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:27,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:27,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:27,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:36:27,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541220817] [2021-06-12 20:36:27,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:36:27,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:27,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:36:27,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:36:27,315 INFO L87 Difference]: Start difference. First operand 3899 states and 17473 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-06-12 20:36:28,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:28,670 INFO L93 Difference]: Finished difference Result 5249 states and 22919 transitions. [2021-06-12 20:36:28,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:36:28,670 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 30 [2021-06-12 20:36:28,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:28,681 INFO L225 Difference]: With dead ends: 5249 [2021-06-12 20:36:28,681 INFO L226 Difference]: Without dead ends: 5176 [2021-06-12 20:36:28,681 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 896.9ms TimeCoverageRelationStatistics Valid=281, Invalid=1611, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:36:28,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-12 20:36:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 3875. [2021-06-12 20:36:28,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3874 states have (on average 4.489416623644812) internal successors, (17392), 3874 states have internal predecessors, (17392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 17392 transitions. [2021-06-12 20:36:28,747 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 17392 transitions. Word has length 30 [2021-06-12 20:36:28,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:28,747 INFO L482 AbstractCegarLoop]: Abstraction has 3875 states and 17392 transitions. [2021-06-12 20:36:28,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-06-12 20:36:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 17392 transitions. [2021-06-12 20:36:28,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:36:28,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:28,753 INFO L472 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] [2021-06-12 20:36:28,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-12 20:36:28,954 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:28,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:28,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1442945638, now seen corresponding path program 21 times [2021-06-12 20:36:28,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:28,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910935300] [2021-06-12 20:36:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:29,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:29,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910935300] [2021-06-12 20:36:29,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910935300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:29,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885077076] [2021-06-12 20:36:29,162 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 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 [2021-06-12 20:36:29,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:36:29,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:29,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:36:29,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:29,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:36:29,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:36:29,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:29,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:29,552 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 29 treesize of output 17 [2021-06-12 20:36:29,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:29,565 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-12 20:36:29,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:29,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-12 20:36:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:29,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885077076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:29,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:29,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-12 20:36:29,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777102104] [2021-06-12 20:36:29,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:36:29,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:29,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:36:29,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:36:29,611 INFO L87 Difference]: Start difference. First operand 3875 states and 17392 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-06-12 20:36:31,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:31,151 INFO L93 Difference]: Finished difference Result 4957 states and 21263 transitions. [2021-06-12 20:36:31,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:36:31,152 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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 30 [2021-06-12 20:36:31,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:31,161 INFO L225 Difference]: With dead ends: 4957 [2021-06-12 20:36:31,162 INFO L226 Difference]: Without dead ends: 4795 [2021-06-12 20:36:31,162 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 881.0ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:36:31,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4795 states. [2021-06-12 20:36:31,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4795 to 3949. [2021-06-12 20:36:31,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3949 states, 3948 states have (on average 4.4693515704154) internal successors, (17645), 3948 states have internal predecessors, (17645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:31,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3949 states to 3949 states and 17645 transitions. [2021-06-12 20:36:31,227 INFO L78 Accepts]: Start accepts. Automaton has 3949 states and 17645 transitions. Word has length 30 [2021-06-12 20:36:31,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:31,227 INFO L482 AbstractCegarLoop]: Abstraction has 3949 states and 17645 transitions. [2021-06-12 20:36:31,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-06-12 20:36:31,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3949 states and 17645 transitions. [2021-06-12 20:36:31,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:36:31,233 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:31,233 INFO L472 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] [2021-06-12 20:36:31,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-12 20:36:31,433 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:31,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:31,434 INFO L82 PathProgramCache]: Analyzing trace with hash 242481658, now seen corresponding path program 4 times [2021-06-12 20:36:31,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:31,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832447433] [2021-06-12 20:36:31,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:31,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:31,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832447433] [2021-06-12 20:36:31,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832447433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:31,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162818885] [2021-06-12 20:36:31,627 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 [2021-06-12 20:36:31,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:36:31,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:31,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:36:31,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:31,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:36:31,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:31,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:31,898 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 33 treesize of output 17 [2021-06-12 20:36:31,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:31,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:31,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:31,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-12 20:36:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:31,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162818885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:31,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:31,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-12 20:36:31,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980501723] [2021-06-12 20:36:31,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:36:31,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:31,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:36:31,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:36:31,958 INFO L87 Difference]: Start difference. First operand 3949 states and 17645 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:36:32,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:32,953 INFO L93 Difference]: Finished difference Result 4626 states and 20349 transitions. [2021-06-12 20:36:32,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:36:32,953 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:36:32,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:32,962 INFO L225 Difference]: With dead ends: 4626 [2021-06-12 20:36:32,962 INFO L226 Difference]: Without dead ends: 4553 [2021-06-12 20:36:32,963 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 629.9ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:36:32,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4553 states. [2021-06-12 20:36:33,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4553 to 3969. [2021-06-12 20:36:33,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3969 states, 3968 states have (on average 4.465977822580645) internal successors, (17721), 3968 states have internal predecessors, (17721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3969 states to 3969 states and 17721 transitions. [2021-06-12 20:36:33,028 INFO L78 Accepts]: Start accepts. Automaton has 3969 states and 17721 transitions. Word has length 30 [2021-06-12 20:36:33,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:33,028 INFO L482 AbstractCegarLoop]: Abstraction has 3969 states and 17721 transitions. [2021-06-12 20:36:33,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:36:33,028 INFO L276 IsEmpty]: Start isEmpty. Operand 3969 states and 17721 transitions. [2021-06-12 20:36:33,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:36:33,034 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:33,034 INFO L472 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] [2021-06-12 20:36:33,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:33,234 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:33,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:33,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1634626204, now seen corresponding path program 5 times [2021-06-12 20:36:33,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:33,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644624425] [2021-06-12 20:36:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:33,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:33,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644624425] [2021-06-12 20:36:33,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644624425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:33,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537778138] [2021-06-12 20:36:33,428 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 [2021-06-12 20:36:33,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:36:33,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:33,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:36:33,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:33,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:36:33,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:33,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:33,678 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 33 treesize of output 17 [2021-06-12 20:36:33,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:33,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:33,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:33,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-12 20:36:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:33,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537778138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:33,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:33,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-12 20:36:33,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216691525] [2021-06-12 20:36:33,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:36:33,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:33,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:36:33,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:36:33,753 INFO L87 Difference]: Start difference. First operand 3969 states and 17721 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:36:34,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:34,805 INFO L93 Difference]: Finished difference Result 4613 states and 20313 transitions. [2021-06-12 20:36:34,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:36:34,805 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:36:34,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:34,814 INFO L225 Difference]: With dead ends: 4613 [2021-06-12 20:36:34,814 INFO L226 Difference]: Without dead ends: 4532 [2021-06-12 20:36:34,814 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 625.0ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:36:34,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4532 states. [2021-06-12 20:36:34,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4532 to 3979. [2021-06-12 20:36:34,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3979 states, 3978 states have (on average 4.464303670186023) internal successors, (17759), 3978 states have internal predecessors, (17759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:34,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3979 states to 3979 states and 17759 transitions. [2021-06-12 20:36:34,882 INFO L78 Accepts]: Start accepts. Automaton has 3979 states and 17759 transitions. Word has length 30 [2021-06-12 20:36:34,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:34,882 INFO L482 AbstractCegarLoop]: Abstraction has 3979 states and 17759 transitions. [2021-06-12 20:36:34,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:36:34,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3979 states and 17759 transitions. [2021-06-12 20:36:34,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:36:34,888 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:34,888 INFO L472 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] [2021-06-12 20:36:35,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-12 20:36:35,089 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:35,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:35,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1128279938, now seen corresponding path program 6 times [2021-06-12 20:36:35,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:35,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410619758] [2021-06-12 20:36:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:35,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:35,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410619758] [2021-06-12 20:36:35,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410619758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:35,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411461473] [2021-06-12 20:36:35,279 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 [2021-06-12 20:36:35,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:36:35,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:35,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:36:35,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:35,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:36:35,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:36:35,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:36:35,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:35,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-12 20:36:35,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:36:35,609 INFO L628 ElimStorePlain]: treesize reduction 27, result has 52.6 percent of original size [2021-06-12 20:36:35,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:35,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:24 [2021-06-12 20:36:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:35,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411461473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:35,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:35,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-12 20:36:35,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19046802] [2021-06-12 20:36:35,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:36:35,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:35,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:36:35,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:36:35,730 INFO L87 Difference]: Start difference. First operand 3979 states and 17759 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2021-06-12 20:36:36,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:36,995 INFO L93 Difference]: Finished difference Result 4720 states and 20746 transitions. [2021-06-12 20:36:36,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:36:36,995 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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 30 [2021-06-12 20:36:36,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:37,006 INFO L225 Difference]: With dead ends: 4720 [2021-06-12 20:36:37,006 INFO L226 Difference]: Without dead ends: 4639 [2021-06-12 20:36:37,006 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 923.2ms TimeCoverageRelationStatistics Valid=201, Invalid=1605, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:36:37,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2021-06-12 20:36:37,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 3979. [2021-06-12 20:36:37,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3979 states, 3978 states have (on average 4.464303670186023) internal successors, (17759), 3978 states have internal predecessors, (17759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3979 states to 3979 states and 17759 transitions. [2021-06-12 20:36:37,075 INFO L78 Accepts]: Start accepts. Automaton has 3979 states and 17759 transitions. Word has length 30 [2021-06-12 20:36:37,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:37,076 INFO L482 AbstractCegarLoop]: Abstraction has 3979 states and 17759 transitions. [2021-06-12 20:36:37,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2021-06-12 20:36:37,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3979 states and 17759 transitions. [2021-06-12 20:36:37,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:36:37,082 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:37,083 INFO L472 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] [2021-06-12 20:36:37,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:37,283 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:37,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:37,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1727284940, now seen corresponding path program 22 times [2021-06-12 20:36:37,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:37,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238657347] [2021-06-12 20:36:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:37,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:37,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238657347] [2021-06-12 20:36:37,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238657347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:37,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277317441] [2021-06-12 20:36:37,556 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 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 [2021-06-12 20:36:37,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:36:37,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:37,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:36:37,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:37,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:36:37,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:37,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:37,777 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 33 treesize of output 17 [2021-06-12 20:36:37,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:37,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:37,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:37,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-12 20:36:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:37,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277317441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:37,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:37,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:36:37,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164706673] [2021-06-12 20:36:37,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:36:37,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:37,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:36:37,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:36:37,834 INFO L87 Difference]: Start difference. First operand 3979 states and 17759 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:36:39,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:39,676 INFO L93 Difference]: Finished difference Result 5261 states and 22917 transitions. [2021-06-12 20:36:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:36:39,676 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 30 [2021-06-12 20:36:39,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:39,687 INFO L225 Difference]: With dead ends: 5261 [2021-06-12 20:36:39,688 INFO L226 Difference]: Without dead ends: 5069 [2021-06-12 20:36:39,688 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1254.2ms TimeCoverageRelationStatistics Valid=313, Invalid=1667, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:36:39,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5069 states. [2021-06-12 20:36:39,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5069 to 4014. [2021-06-12 20:36:39,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4014 states, 4013 states have (on average 4.46922501868926) internal successors, (17935), 4013 states have internal predecessors, (17935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:39,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4014 states to 4014 states and 17935 transitions. [2021-06-12 20:36:39,762 INFO L78 Accepts]: Start accepts. Automaton has 4014 states and 17935 transitions. Word has length 30 [2021-06-12 20:36:39,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:39,762 INFO L482 AbstractCegarLoop]: Abstraction has 4014 states and 17935 transitions. [2021-06-12 20:36:39,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:36:39,762 INFO L276 IsEmpty]: Start isEmpty. Operand 4014 states and 17935 transitions. [2021-06-12 20:36:39,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:36:39,769 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:39,769 INFO L472 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] [2021-06-12 20:36:39,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:39,970 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:39,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:39,970 INFO L82 PathProgramCache]: Analyzing trace with hash 300371958, now seen corresponding path program 7 times [2021-06-12 20:36:39,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:39,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706593158] [2021-06-12 20:36:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:40,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:40,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:40,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706593158] [2021-06-12 20:36:40,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706593158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:40,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416761675] [2021-06-12 20:36:40,185 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 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 [2021-06-12 20:36:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:40,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:36:40,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:40,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:36:40,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:40,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:40,459 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 33 treesize of output 17 [2021-06-12 20:36:40,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:40,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:40,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:40,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-12 20:36:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:40,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416761675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:40,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:40,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:36:40,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616111829] [2021-06-12 20:36:40,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:36:40,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:40,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:36:40,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:36:40,551 INFO L87 Difference]: Start difference. First operand 4014 states and 17935 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:36:41,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:41,618 INFO L93 Difference]: Finished difference Result 4912 states and 21474 transitions. [2021-06-12 20:36:41,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:36:41,618 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-06-12 20:36:41,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:41,629 INFO L225 Difference]: With dead ends: 4912 [2021-06-12 20:36:41,629 INFO L226 Difference]: Without dead ends: 4839 [2021-06-12 20:36:41,629 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 760.0ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:36:41,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4839 states. [2021-06-12 20:36:41,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4839 to 3996. [2021-06-12 20:36:41,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3996 states, 3995 states have (on average 4.473091364205256) internal successors, (17870), 3995 states have internal predecessors, (17870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:41,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3996 states to 3996 states and 17870 transitions. [2021-06-12 20:36:41,696 INFO L78 Accepts]: Start accepts. Automaton has 3996 states and 17870 transitions. Word has length 30 [2021-06-12 20:36:41,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:41,697 INFO L482 AbstractCegarLoop]: Abstraction has 3996 states and 17870 transitions. [2021-06-12 20:36:41,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:36:41,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3996 states and 17870 transitions. [2021-06-12 20:36:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:36:41,703 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:41,703 INFO L472 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] [2021-06-12 20:36:41,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:41,903 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:41,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:41,904 INFO L82 PathProgramCache]: Analyzing trace with hash 800539618, now seen corresponding path program 53 times [2021-06-12 20:36:41,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:41,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299310928] [2021-06-12 20:36:41,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:42,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:42,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299310928] [2021-06-12 20:36:42,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299310928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:42,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718248186] [2021-06-12 20:36:42,081 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 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 [2021-06-12 20:36:42,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:36:42,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:42,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:36:42,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:42,310 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 [2021-06-12 20:36:42,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:42,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:42,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:42,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:36:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:42,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718248186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:42,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:42,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:36:42,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907144540] [2021-06-12 20:36:42,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:36:42,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:42,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:36:42,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:36:42,359 INFO L87 Difference]: Start difference. First operand 3996 states and 17870 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-06-12 20:36:43,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:43,964 INFO L93 Difference]: Finished difference Result 6208 states and 26833 transitions. [2021-06-12 20:36:43,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 20:36:43,964 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 30 [2021-06-12 20:36:43,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:43,977 INFO L225 Difference]: With dead ends: 6208 [2021-06-12 20:36:43,977 INFO L226 Difference]: Without dead ends: 6026 [2021-06-12 20:36:43,977 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1019.7ms TimeCoverageRelationStatistics Valid=376, Invalid=2276, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:36:43,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6026 states. [2021-06-12 20:36:44,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6026 to 4094. [2021-06-12 20:36:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4094 states, 4093 states have (on average 4.472269728805277) internal successors, (18305), 4093 states have internal predecessors, (18305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:44,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4094 states to 4094 states and 18305 transitions. [2021-06-12 20:36:44,052 INFO L78 Accepts]: Start accepts. Automaton has 4094 states and 18305 transitions. Word has length 30 [2021-06-12 20:36:44,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:44,052 INFO L482 AbstractCegarLoop]: Abstraction has 4094 states and 18305 transitions. [2021-06-12 20:36:44,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-06-12 20:36:44,052 INFO L276 IsEmpty]: Start isEmpty. Operand 4094 states and 18305 transitions. [2021-06-12 20:36:44,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:36:44,058 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:44,058 INFO L472 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] [2021-06-12 20:36:44,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-12 20:36:44,259 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:44,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:44,259 INFO L82 PathProgramCache]: Analyzing trace with hash 2105279012, now seen corresponding path program 8 times [2021-06-12 20:36:44,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:44,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459773235] [2021-06-12 20:36:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:44,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:44,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459773235] [2021-06-12 20:36:44,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459773235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:44,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049247295] [2021-06-12 20:36:44,453 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 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 [2021-06-12 20:36:44,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:44,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:44,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:36:44,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:44,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:36:44,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:36:44,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:44,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-12 20:36:44,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:36:44,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:44,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:44,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-12 20:36:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:44,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049247295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:44,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:44,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:36:44,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516564845] [2021-06-12 20:36:44,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:36:44,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:44,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:36:44,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:36:44,758 INFO L87 Difference]: Start difference. First operand 4094 states and 18305 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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) [2021-06-12 20:36:47,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:47,005 INFO L93 Difference]: Finished difference Result 5912 states and 25340 transitions. [2021-06-12 20:36:47,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 20:36:47,005 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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 30 [2021-06-12 20:36:47,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:47,016 INFO L225 Difference]: With dead ends: 5912 [2021-06-12 20:36:47,016 INFO L226 Difference]: Without dead ends: 5564 [2021-06-12 20:36:47,017 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1488.5ms TimeCoverageRelationStatistics Valid=412, Invalid=3010, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 20:36:47,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2021-06-12 20:36:47,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 4100. [2021-06-12 20:36:47,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4100 states, 4099 states have (on average 4.47011466211271) internal successors, (18323), 4099 states have internal predecessors, (18323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:47,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4100 states to 4100 states and 18323 transitions. [2021-06-12 20:36:47,090 INFO L78 Accepts]: Start accepts. Automaton has 4100 states and 18323 transitions. Word has length 30 [2021-06-12 20:36:47,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:47,090 INFO L482 AbstractCegarLoop]: Abstraction has 4100 states and 18323 transitions. [2021-06-12 20:36:47,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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) [2021-06-12 20:36:47,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4100 states and 18323 transitions. [2021-06-12 20:36:47,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:36:47,096 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:47,096 INFO L472 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] [2021-06-12 20:36:47,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-12 20:36:47,297 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:47,297 INFO L82 PathProgramCache]: Analyzing trace with hash -381875840, now seen corresponding path program 54 times [2021-06-12 20:36:47,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:47,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398861741] [2021-06-12 20:36:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:47,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:47,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398861741] [2021-06-12 20:36:47,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398861741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:47,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428431008] [2021-06-12 20:36:47,560 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 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 [2021-06-12 20:36:47,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:36:47,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:47,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:36:47,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:47,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:47,735 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 [2021-06-12 20:36:47,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:47,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:47,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:47,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:36:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:47,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428431008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:47,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:47,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:36:47,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185179430] [2021-06-12 20:36:47,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:36:47,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:47,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:36:47,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:36:47,860 INFO L87 Difference]: Start difference. First operand 4100 states and 18323 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-06-12 20:36:49,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:49,704 INFO L93 Difference]: Finished difference Result 6189 states and 26443 transitions. [2021-06-12 20:36:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:36:49,704 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 30 [2021-06-12 20:36:49,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:49,716 INFO L225 Difference]: With dead ends: 6189 [2021-06-12 20:36:49,716 INFO L226 Difference]: Without dead ends: 5993 [2021-06-12 20:36:49,716 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1372.7ms TimeCoverageRelationStatistics Valid=391, Invalid=2261, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:36:49,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5993 states. [2021-06-12 20:36:49,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5993 to 4143. [2021-06-12 20:36:49,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4143 states, 4142 states have (on average 4.466441332689522) internal successors, (18500), 4142 states have internal predecessors, (18500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4143 states to 4143 states and 18500 transitions. [2021-06-12 20:36:49,785 INFO L78 Accepts]: Start accepts. Automaton has 4143 states and 18500 transitions. Word has length 30 [2021-06-12 20:36:49,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:49,786 INFO L482 AbstractCegarLoop]: Abstraction has 4143 states and 18500 transitions. [2021-06-12 20:36:49,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-06-12 20:36:49,786 INFO L276 IsEmpty]: Start isEmpty. Operand 4143 states and 18500 transitions. [2021-06-12 20:36:49,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:36:49,792 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:49,792 INFO L472 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] [2021-06-12 20:36:49,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-12 20:36:49,992 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:49,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:49,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1170896104, now seen corresponding path program 55 times [2021-06-12 20:36:49,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:49,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091917122] [2021-06-12 20:36:49,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:50,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:50,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091917122] [2021-06-12 20:36:50,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091917122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:50,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521598929] [2021-06-12 20:36:50,212 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 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 [2021-06-12 20:36:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:50,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:36:50,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:50,388 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 [2021-06-12 20:36:50,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:50,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:50,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:50,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:36:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:50,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521598929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:50,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:50,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:36:50,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358045551] [2021-06-12 20:36:50,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:36:50,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:50,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:36:50,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:36:50,450 INFO L87 Difference]: Start difference. First operand 4143 states and 18500 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:36:52,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:52,013 INFO L93 Difference]: Finished difference Result 6154 states and 26681 transitions. [2021-06-12 20:36:52,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 20:36:52,013 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-06-12 20:36:52,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:52,026 INFO L225 Difference]: With dead ends: 6154 [2021-06-12 20:36:52,026 INFO L226 Difference]: Without dead ends: 6072 [2021-06-12 20:36:52,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1242.8ms TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:36:52,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6072 states. [2021-06-12 20:36:52,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6072 to 4139. [2021-06-12 20:36:52,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4138 states have (on average 4.467133881101982) internal successors, (18485), 4138 states have internal predecessors, (18485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:52,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 18485 transitions. [2021-06-12 20:36:52,104 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 18485 transitions. Word has length 30 [2021-06-12 20:36:52,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:52,104 INFO L482 AbstractCegarLoop]: Abstraction has 4139 states and 18485 transitions. [2021-06-12 20:36:52,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:36:52,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 18485 transitions. [2021-06-12 20:36:52,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:36:52,113 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:52,113 INFO L472 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] [2021-06-12 20:36:52,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:52,313 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:52,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:52,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1746601602, now seen corresponding path program 9 times [2021-06-12 20:36:52,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:52,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644500630] [2021-06-12 20:36:52,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:52,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:52,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:52,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644500630] [2021-06-12 20:36:52,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644500630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:52,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242415058] [2021-06-12 20:36:52,540 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 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 [2021-06-12 20:36:52,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:36:52,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:52,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:36:52,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:52,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:52,726 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 [2021-06-12 20:36:52,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:52,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:52,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:52,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:36:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:52,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242415058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:52,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:52,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:36:52,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368411332] [2021-06-12 20:36:52,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:36:52,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:52,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:36:52,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:36:52,841 INFO L87 Difference]: Start difference. First operand 4139 states and 18485 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:36:55,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:55,046 INFO L93 Difference]: Finished difference Result 5882 states and 25230 transitions. [2021-06-12 20:36:55,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 20:36:55,047 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:36:55,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:55,058 INFO L225 Difference]: With dead ends: 5882 [2021-06-12 20:36:55,058 INFO L226 Difference]: Without dead ends: 5569 [2021-06-12 20:36:55,058 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1634.5ms TimeCoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 20:36:55,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5569 states. [2021-06-12 20:36:55,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5569 to 4166. [2021-06-12 20:36:55,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4166 states, 4165 states have (on average 4.465546218487395) internal successors, (18599), 4165 states have internal predecessors, (18599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:55,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4166 states to 4166 states and 18599 transitions. [2021-06-12 20:36:55,131 INFO L78 Accepts]: Start accepts. Automaton has 4166 states and 18599 transitions. Word has length 30 [2021-06-12 20:36:55,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:55,131 INFO L482 AbstractCegarLoop]: Abstraction has 4166 states and 18599 transitions. [2021-06-12 20:36:55,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:36:55,131 INFO L276 IsEmpty]: Start isEmpty. Operand 4166 states and 18599 transitions. [2021-06-12 20:36:55,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:36:55,138 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:55,138 INFO L472 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] [2021-06-12 20:36:55,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:55,338 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:55,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:55,338 INFO L82 PathProgramCache]: Analyzing trace with hash 351014526, now seen corresponding path program 10 times [2021-06-12 20:36:55,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:55,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811319371] [2021-06-12 20:36:55,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:55,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:55,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811319371] [2021-06-12 20:36:55,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811319371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:55,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783122998] [2021-06-12 20:36:55,557 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 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 [2021-06-12 20:36:55,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:36:55,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:55,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:36:55,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:55,747 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 [2021-06-12 20:36:55,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:55,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:55,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:55,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:36:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:55,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783122998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:55,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:55,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:36:55,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709857714] [2021-06-12 20:36:55,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:36:55,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:55,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:36:55,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:36:55,803 INFO L87 Difference]: Start difference. First operand 4166 states and 18599 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-06-12 20:36:57,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:57,802 INFO L93 Difference]: Finished difference Result 5721 states and 24904 transitions. [2021-06-12 20:36:57,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 20:36:57,802 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 30 [2021-06-12 20:36:57,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:57,813 INFO L225 Difference]: With dead ends: 5721 [2021-06-12 20:36:57,813 INFO L226 Difference]: Without dead ends: 5638 [2021-06-12 20:36:57,814 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1591.3ms TimeCoverageRelationStatistics Valid=489, Invalid=2703, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:36:57,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-06-12 20:36:57,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 4157. [2021-06-12 20:36:57,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4157 states, 4156 states have (on average 4.467516843118383) internal successors, (18567), 4156 states have internal predecessors, (18567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:57,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4157 states to 4157 states and 18567 transitions. [2021-06-12 20:36:57,885 INFO L78 Accepts]: Start accepts. Automaton has 4157 states and 18567 transitions. Word has length 30 [2021-06-12 20:36:57,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:57,885 INFO L482 AbstractCegarLoop]: Abstraction has 4157 states and 18567 transitions. [2021-06-12 20:36:57,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-06-12 20:36:57,885 INFO L276 IsEmpty]: Start isEmpty. Operand 4157 states and 18567 transitions. [2021-06-12 20:36:57,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:36:57,892 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:57,892 INFO L472 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] [2021-06-12 20:36:58,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:58,092 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:58,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:58,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1634241206, now seen corresponding path program 56 times [2021-06-12 20:36:58,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:58,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082249913] [2021-06-12 20:36:58,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:58,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:58,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082249913] [2021-06-12 20:36:58,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082249913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:58,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004259292] [2021-06-12 20:36:58,265 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 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 [2021-06-12 20:36:58,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:58,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:58,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:36:58,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:58,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:36:58,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:36:58,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:58,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-12 20:36:58,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:36:58,519 INFO L628 ElimStorePlain]: treesize reduction 25, result has 46.8 percent of original size [2021-06-12 20:36:58,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:58,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-12 20:36:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:58,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004259292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:58,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:58,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:36:58,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646259470] [2021-06-12 20:36:58,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:36:58,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:58,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:36:58,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:36:58,593 INFO L87 Difference]: Start difference. First operand 4157 states and 18567 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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) [2021-06-12 20:37:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:00,806 INFO L93 Difference]: Finished difference Result 6423 states and 27371 transitions. [2021-06-12 20:37:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 20:37:00,806 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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 30 [2021-06-12 20:37:00,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:00,819 INFO L225 Difference]: With dead ends: 6423 [2021-06-12 20:37:00,820 INFO L226 Difference]: Without dead ends: 6097 [2021-06-12 20:37:00,820 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1269.8ms TimeCoverageRelationStatistics Valid=386, Invalid=2694, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 20:37:00,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6097 states. [2021-06-12 20:37:00,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6097 to 4207. [2021-06-12 20:37:00,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4207 states, 4206 states have (on average 4.46528768426058) internal successors, (18781), 4206 states have internal predecessors, (18781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:00,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 18781 transitions. [2021-06-12 20:37:00,902 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 18781 transitions. Word has length 30 [2021-06-12 20:37:00,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:00,902 INFO L482 AbstractCegarLoop]: Abstraction has 4207 states and 18781 transitions. [2021-06-12 20:37:00,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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) [2021-06-12 20:37:00,903 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 18781 transitions. [2021-06-12 20:37:00,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:00,910 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:00,910 INFO L472 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] [2021-06-12 20:37:01,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-12 20:37:01,110 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:01,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:01,110 INFO L82 PathProgramCache]: Analyzing trace with hash -329501812, now seen corresponding path program 11 times [2021-06-12 20:37:01,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:01,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921702772] [2021-06-12 20:37:01,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:01,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:01,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921702772] [2021-06-12 20:37:01,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921702772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:01,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975993687] [2021-06-12 20:37:01,315 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 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 [2021-06-12 20:37:01,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:37:01,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:01,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:01,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:01,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-12 20:37:01,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:01,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:01,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:01,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:37:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:01,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975993687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:01,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:01,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:37:01,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537516786] [2021-06-12 20:37:01,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:37:01,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:01,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:37:01,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:37:01,551 INFO L87 Difference]: Start difference. First operand 4207 states and 18781 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:37:03,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:03,145 INFO L93 Difference]: Finished difference Result 6015 states and 26020 transitions. [2021-06-12 20:37:03,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:37:03,145 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 30 [2021-06-12 20:37:03,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:03,157 INFO L225 Difference]: With dead ends: 6015 [2021-06-12 20:37:03,158 INFO L226 Difference]: Without dead ends: 5833 [2021-06-12 20:37:03,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1096.0ms TimeCoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:37:03,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5833 states. [2021-06-12 20:37:03,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5833 to 4239. [2021-06-12 20:37:03,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4239 states, 4238 states have (on average 4.460830580462482) internal successors, (18905), 4238 states have internal predecessors, (18905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:03,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 18905 transitions. [2021-06-12 20:37:03,236 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 18905 transitions. Word has length 30 [2021-06-12 20:37:03,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:03,236 INFO L482 AbstractCegarLoop]: Abstraction has 4239 states and 18905 transitions. [2021-06-12 20:37:03,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:37:03,236 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 18905 transitions. [2021-06-12 20:37:03,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:03,243 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:03,243 INFO L472 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] [2021-06-12 20:37:03,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-12 20:37:03,443 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:03,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:03,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1952911604, now seen corresponding path program 12 times [2021-06-12 20:37:03,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:03,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415556823] [2021-06-12 20:37:03,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:03,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:03,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415556823] [2021-06-12 20:37:03,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415556823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:03,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741225890] [2021-06-12 20:37:03,626 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 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 [2021-06-12 20:37:03,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:37:03,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:03,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:03,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:03,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:03,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:03,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:03,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:03,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-12 20:37:03,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:03,951 INFO L628 ElimStorePlain]: treesize reduction 27, result has 52.6 percent of original size [2021-06-12 20:37:03,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:03,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:24 [2021-06-12 20:37:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:04,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741225890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:04,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:04,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:37:04,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378213563] [2021-06-12 20:37:04,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:37:04,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:04,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:37:04,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:37:04,053 INFO L87 Difference]: Start difference. First operand 4239 states and 18905 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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) [2021-06-12 20:37:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:05,636 INFO L93 Difference]: Finished difference Result 5775 states and 24871 transitions. [2021-06-12 20:37:05,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:37:05,636 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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 30 [2021-06-12 20:37:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:05,648 INFO L225 Difference]: With dead ends: 5775 [2021-06-12 20:37:05,648 INFO L226 Difference]: Without dead ends: 5492 [2021-06-12 20:37:05,648 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1078.1ms TimeCoverageRelationStatistics Valid=271, Invalid=1621, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:37:05,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5492 states. [2021-06-12 20:37:05,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5492 to 4251. [2021-06-12 20:37:05,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4251 states, 4250 states have (on average 4.459764705882353) internal successors, (18954), 4250 states have internal predecessors, (18954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:05,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4251 states to 4251 states and 18954 transitions. [2021-06-12 20:37:05,752 INFO L78 Accepts]: Start accepts. Automaton has 4251 states and 18954 transitions. Word has length 30 [2021-06-12 20:37:05,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:05,753 INFO L482 AbstractCegarLoop]: Abstraction has 4251 states and 18954 transitions. [2021-06-12 20:37:05,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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) [2021-06-12 20:37:05,753 INFO L276 IsEmpty]: Start isEmpty. Operand 4251 states and 18954 transitions. [2021-06-12 20:37:05,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:05,761 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:05,761 INFO L472 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] [2021-06-12 20:37:05,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-12 20:37:05,983 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:05,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:05,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1835709426, now seen corresponding path program 13 times [2021-06-12 20:37:05,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:05,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620550064] [2021-06-12 20:37:05,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:06,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:06,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620550064] [2021-06-12 20:37:06,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620550064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:06,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564418984] [2021-06-12 20:37:06,173 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 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 [2021-06-12 20:37:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:06,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:06,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:06,340 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 20 treesize of output 12 [2021-06-12 20:37:06,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:06,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:06,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:06,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-12 20:37:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:06,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564418984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:06,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:06,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:37:06,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018679605] [2021-06-12 20:37:06,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:37:06,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:06,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:37:06,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:37:06,394 INFO L87 Difference]: Start difference. First operand 4251 states and 18954 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:37:07,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:07,805 INFO L93 Difference]: Finished difference Result 5808 states and 25286 transitions. [2021-06-12 20:37:07,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:37:07,806 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 30 [2021-06-12 20:37:07,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:07,818 INFO L225 Difference]: With dead ends: 5808 [2021-06-12 20:37:07,818 INFO L226 Difference]: Without dead ends: 5709 [2021-06-12 20:37:07,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1011.7ms TimeCoverageRelationStatistics Valid=328, Invalid=1742, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:37:07,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5709 states. [2021-06-12 20:37:07,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5709 to 4219. [2021-06-12 20:37:07,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4219 states, 4218 states have (on average 4.463963963963964) internal successors, (18829), 4218 states have internal predecessors, (18829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:07,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4219 states to 4219 states and 18829 transitions. [2021-06-12 20:37:07,914 INFO L78 Accepts]: Start accepts. Automaton has 4219 states and 18829 transitions. Word has length 30 [2021-06-12 20:37:07,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:07,914 INFO L482 AbstractCegarLoop]: Abstraction has 4219 states and 18829 transitions. [2021-06-12 20:37:07,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:37:07,914 INFO L276 IsEmpty]: Start isEmpty. Operand 4219 states and 18829 transitions. [2021-06-12 20:37:07,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:07,920 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:07,921 INFO L472 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] [2021-06-12 20:37:08,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:08,121 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:08,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:08,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1331922536, now seen corresponding path program 14 times [2021-06-12 20:37:08,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:08,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089722288] [2021-06-12 20:37:08,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:08,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:08,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089722288] [2021-06-12 20:37:08,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089722288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:08,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294375738] [2021-06-12 20:37:08,364 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 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 [2021-06-12 20:37:08,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:08,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:08,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:37:08,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:08,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:08,548 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 [2021-06-12 20:37:08,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:08,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:08,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:08,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:37:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:08,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294375738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:08,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:08,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:37:08,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216178310] [2021-06-12 20:37:08,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:37:08,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:08,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:37:08,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:37:08,692 INFO L87 Difference]: Start difference. First operand 4219 states and 18829 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:37:11,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:11,093 INFO L93 Difference]: Finished difference Result 5840 states and 25153 transitions. [2021-06-12 20:37:11,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 20:37:11,093 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:37:11,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:11,106 INFO L225 Difference]: With dead ends: 5840 [2021-06-12 20:37:11,106 INFO L226 Difference]: Without dead ends: 5684 [2021-06-12 20:37:11,106 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1818.9ms TimeCoverageRelationStatistics Valid=423, Invalid=2999, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 20:37:11,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5684 states. [2021-06-12 20:37:11,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5684 to 4234. [2021-06-12 20:37:11,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 4233 states have (on average 4.462556106780061) internal successors, (18890), 4233 states have internal predecessors, (18890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:11,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 18890 transitions. [2021-06-12 20:37:11,181 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 18890 transitions. Word has length 30 [2021-06-12 20:37:11,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:11,181 INFO L482 AbstractCegarLoop]: Abstraction has 4234 states and 18890 transitions. [2021-06-12 20:37:11,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:37:11,181 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 18890 transitions. [2021-06-12 20:37:11,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:11,188 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:11,188 INFO L472 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] [2021-06-12 20:37:11,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-12 20:37:11,396 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:11,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:11,396 INFO L82 PathProgramCache]: Analyzing trace with hash -63664540, now seen corresponding path program 15 times [2021-06-12 20:37:11,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:11,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982758258] [2021-06-12 20:37:11,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:11,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:11,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982758258] [2021-06-12 20:37:11,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982758258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:11,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966792074] [2021-06-12 20:37:11,626 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 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 [2021-06-12 20:37:11,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:37:11,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:11,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:37:11,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:11,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:11,818 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 [2021-06-12 20:37:11,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:11,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:11,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:11,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:37:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:11,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966792074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:11,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:11,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:37:11,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71846007] [2021-06-12 20:37:11,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:37:11,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:11,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:37:11,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:37:11,978 INFO L87 Difference]: Start difference. First operand 4234 states and 18890 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:37:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:14,419 INFO L93 Difference]: Finished difference Result 6056 states and 26106 transitions. [2021-06-12 20:37:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 20:37:14,419 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:37:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:14,431 INFO L225 Difference]: With dead ends: 6056 [2021-06-12 20:37:14,431 INFO L226 Difference]: Without dead ends: 5858 [2021-06-12 20:37:14,432 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1930.9ms TimeCoverageRelationStatistics Valid=517, Invalid=3143, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 20:37:14,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5858 states. [2021-06-12 20:37:14,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5858 to 4234. [2021-06-12 20:37:14,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 4233 states have (on average 4.462556106780061) internal successors, (18890), 4233 states have internal predecessors, (18890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:14,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 18890 transitions. [2021-06-12 20:37:14,509 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 18890 transitions. Word has length 30 [2021-06-12 20:37:14,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:14,509 INFO L482 AbstractCegarLoop]: Abstraction has 4234 states and 18890 transitions. [2021-06-12 20:37:14,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:37:14,509 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 18890 transitions. [2021-06-12 20:37:14,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:14,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:14,516 INFO L472 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] [2021-06-12 20:37:14,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:14,716 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:14,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:14,717 INFO L82 PathProgramCache]: Analyzing trace with hash -427368126, now seen corresponding path program 16 times [2021-06-12 20:37:14,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:14,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736342095] [2021-06-12 20:37:14,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:14,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:14,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736342095] [2021-06-12 20:37:14,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736342095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:14,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632124713] [2021-06-12 20:37:14,892 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 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 [2021-06-12 20:37:14,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:14,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:14,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:14,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:15,035 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 [2021-06-12 20:37:15,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:15,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:15,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:15,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:37:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:15,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632124713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:15,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:15,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:37:15,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434460533] [2021-06-12 20:37:15,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:37:15,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:15,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:37:15,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:37:15,105 INFO L87 Difference]: Start difference. First operand 4234 states and 18890 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:37:16,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:16,521 INFO L93 Difference]: Finished difference Result 5452 states and 23785 transitions. [2021-06-12 20:37:16,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:37:16,521 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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 30 [2021-06-12 20:37:16,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:16,533 INFO L225 Difference]: With dead ends: 5452 [2021-06-12 20:37:16,533 INFO L226 Difference]: Without dead ends: 5379 [2021-06-12 20:37:16,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1054.8ms TimeCoverageRelationStatistics Valid=259, Invalid=1381, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:37:16,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5379 states. [2021-06-12 20:37:16,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5379 to 4239. [2021-06-12 20:37:16,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4239 states, 4238 states have (on average 4.4624823029731004) internal successors, (18912), 4238 states have internal predecessors, (18912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:16,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 18912 transitions. [2021-06-12 20:37:16,608 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 18912 transitions. Word has length 30 [2021-06-12 20:37:16,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:16,608 INFO L482 AbstractCegarLoop]: Abstraction has 4239 states and 18912 transitions. [2021-06-12 20:37:16,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:37:16,608 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 18912 transitions. [2021-06-12 20:37:16,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:16,615 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:16,615 INFO L472 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] [2021-06-12 20:37:16,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-12 20:37:16,816 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:16,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:16,816 INFO L82 PathProgramCache]: Analyzing trace with hash -960125108, now seen corresponding path program 17 times [2021-06-12 20:37:16,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:16,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711720940] [2021-06-12 20:37:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:16,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:16,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711720940] [2021-06-12 20:37:16,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711720940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:16,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538008852] [2021-06-12 20:37:16,958 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 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 [2021-06-12 20:37:16,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:37:16,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:16,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:16,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:17,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:17,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:17,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:17,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:17,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-12 20:37:17,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:17,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:17,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:17,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:94 [2021-06-12 20:37:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:17,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538008852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:17,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:17,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-12 20:37:17,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588268460] [2021-06-12 20:37:17,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:37:17,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:17,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:37:17,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:37:17,371 INFO L87 Difference]: Start difference. First operand 4239 states and 18912 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2021-06-12 20:37:18,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:18,669 INFO L93 Difference]: Finished difference Result 5163 states and 22549 transitions. [2021-06-12 20:37:18,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:37:18,669 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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 30 [2021-06-12 20:37:18,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:18,680 INFO L225 Difference]: With dead ends: 5163 [2021-06-12 20:37:18,681 INFO L226 Difference]: Without dead ends: 5104 [2021-06-12 20:37:18,681 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1013.3ms TimeCoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:37:18,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5104 states. [2021-06-12 20:37:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5104 to 4237. [2021-06-12 20:37:18,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4237 states, 4236 states have (on average 4.4627006610009445) internal successors, (18904), 4236 states have internal predecessors, (18904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:18,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4237 states to 4237 states and 18904 transitions. [2021-06-12 20:37:18,756 INFO L78 Accepts]: Start accepts. Automaton has 4237 states and 18904 transitions. Word has length 30 [2021-06-12 20:37:18,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:18,756 INFO L482 AbstractCegarLoop]: Abstraction has 4237 states and 18904 transitions. [2021-06-12 20:37:18,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2021-06-12 20:37:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 4237 states and 18904 transitions. [2021-06-12 20:37:18,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:18,763 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:18,763 INFO L472 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] [2021-06-12 20:37:18,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:18,963 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:18,963 INFO L82 PathProgramCache]: Analyzing trace with hash -78591196, now seen corresponding path program 18 times [2021-06-12 20:37:18,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:18,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570861467] [2021-06-12 20:37:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:19,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:19,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570861467] [2021-06-12 20:37:19,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570861467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:19,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313124473] [2021-06-12 20:37:19,111 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 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 [2021-06-12 20:37:19,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:37:19,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:19,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:19,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:19,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:19,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:19,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:19,269 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 25 treesize of output 53 [2021-06-12 20:37:19,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:19,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:19,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:19,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-06-12 20:37:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:19,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313124473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:19,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:19,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:37:19,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56403672] [2021-06-12 20:37:19,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:37:19,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:19,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:37:19,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:37:19,501 INFO L87 Difference]: Start difference. First operand 4237 states and 18904 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:37:21,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:21,314 INFO L93 Difference]: Finished difference Result 5671 states and 24419 transitions. [2021-06-12 20:37:21,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:37:21,315 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-06-12 20:37:21,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:21,327 INFO L225 Difference]: With dead ends: 5671 [2021-06-12 20:37:21,327 INFO L226 Difference]: Without dead ends: 5525 [2021-06-12 20:37:21,328 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1239.0ms TimeCoverageRelationStatistics Valid=321, Invalid=2031, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:37:21,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-06-12 20:37:21,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 4234. [2021-06-12 20:37:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 4233 states have (on average 4.462556106780061) internal successors, (18890), 4233 states have internal predecessors, (18890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:21,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 18890 transitions. [2021-06-12 20:37:21,409 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 18890 transitions. Word has length 30 [2021-06-12 20:37:21,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:21,409 INFO L482 AbstractCegarLoop]: Abstraction has 4234 states and 18890 transitions. [2021-06-12 20:37:21,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:37:21,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 18890 transitions. [2021-06-12 20:37:21,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:21,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:21,416 INFO L472 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] [2021-06-12 20:37:21,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-12 20:37:21,616 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:21,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1489107404, now seen corresponding path program 19 times [2021-06-12 20:37:21,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:21,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524039954] [2021-06-12 20:37:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:21,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:21,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524039954] [2021-06-12 20:37:21,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524039954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:21,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366433086] [2021-06-12 20:37:21,847 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 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 [2021-06-12 20:37:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:21,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:21,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:22,015 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 [2021-06-12 20:37:22,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:22,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:22,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:22,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:37:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:22,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366433086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:22,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:22,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:37:22,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001292445] [2021-06-12 20:37:22,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:37:22,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:22,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:37:22,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:37:22,091 INFO L87 Difference]: Start difference. First operand 4234 states and 18890 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-06-12 20:37:23,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:23,728 INFO L93 Difference]: Finished difference Result 5602 states and 24458 transitions. [2021-06-12 20:37:23,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:37:23,728 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 30 [2021-06-12 20:37:23,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:23,740 INFO L225 Difference]: With dead ends: 5602 [2021-06-12 20:37:23,740 INFO L226 Difference]: Without dead ends: 5521 [2021-06-12 20:37:23,740 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1331.9ms TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:37:23,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5521 states. [2021-06-12 20:37:23,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5521 to 4244. [2021-06-12 20:37:23,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4244 states, 4243 states have (on average 4.460994579307094) internal successors, (18928), 4243 states have internal predecessors, (18928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:23,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4244 states to 4244 states and 18928 transitions. [2021-06-12 20:37:23,814 INFO L78 Accepts]: Start accepts. Automaton has 4244 states and 18928 transitions. Word has length 30 [2021-06-12 20:37:23,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:23,814 INFO L482 AbstractCegarLoop]: Abstraction has 4244 states and 18928 transitions. [2021-06-12 20:37:23,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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) [2021-06-12 20:37:23,814 INFO L276 IsEmpty]: Start isEmpty. Operand 4244 states and 18928 transitions. [2021-06-12 20:37:23,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:23,820 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:23,820 INFO L472 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] [2021-06-12 20:37:24,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:24,021 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:24,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:24,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1061495886, now seen corresponding path program 20 times [2021-06-12 20:37:24,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:24,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137107630] [2021-06-12 20:37:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:24,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:24,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137107630] [2021-06-12 20:37:24,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137107630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:24,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724801484] [2021-06-12 20:37:24,197 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 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 [2021-06-12 20:37:24,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:24,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:24,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:37:24,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:24,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:24,382 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 [2021-06-12 20:37:24,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:24,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:24,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:24,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:37:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:24,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724801484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:24,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:24,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:37:24,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744585296] [2021-06-12 20:37:24,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:37:24,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:24,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:37:24,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:37:24,595 INFO L87 Difference]: Start difference. First operand 4244 states and 18928 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:37:26,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:26,120 INFO L93 Difference]: Finished difference Result 5552 states and 24126 transitions. [2021-06-12 20:37:26,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:37:26,120 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:37:26,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:26,132 INFO L225 Difference]: With dead ends: 5552 [2021-06-12 20:37:26,132 INFO L226 Difference]: Without dead ends: 5471 [2021-06-12 20:37:26,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1251.1ms TimeCoverageRelationStatistics Valid=346, Invalid=2006, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:37:26,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-06-12 20:37:26,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 4231. [2021-06-12 20:37:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 4230 states have (on average 4.4635933806146575) internal successors, (18881), 4230 states have internal predecessors, (18881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 18881 transitions. [2021-06-12 20:37:26,211 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 18881 transitions. Word has length 30 [2021-06-12 20:37:26,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:26,211 INFO L482 AbstractCegarLoop]: Abstraction has 4231 states and 18881 transitions. [2021-06-12 20:37:26,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:37:26,211 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 18881 transitions. [2021-06-12 20:37:26,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:26,218 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:26,218 INFO L472 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] [2021-06-12 20:37:26,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:26,419 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:26,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:26,419 INFO L82 PathProgramCache]: Analyzing trace with hash -738805052, now seen corresponding path program 23 times [2021-06-12 20:37:26,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:26,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808147162] [2021-06-12 20:37:26,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:26,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:26,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808147162] [2021-06-12 20:37:26,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808147162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:26,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968673461] [2021-06-12 20:37:26,700 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 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 [2021-06-12 20:37:26,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:37:26,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:26,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:26,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:26,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:26,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:27,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:27,012 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 21 treesize of output 45 [2021-06-12 20:37:27,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:27,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:27,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:27,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:241 [2021-06-12 20:37:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:27,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968673461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:27,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:27,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:37:27,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303465181] [2021-06-12 20:37:27,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:37:27,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:27,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:37:27,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:37:27,307 INFO L87 Difference]: Start difference. First operand 4231 states and 18881 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 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) [2021-06-12 20:37:28,050 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-12 20:37:29,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:29,127 INFO L93 Difference]: Finished difference Result 5055 states and 22181 transitions. [2021-06-12 20:37:29,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:37:29,127 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 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 30 [2021-06-12 20:37:29,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:29,138 INFO L225 Difference]: With dead ends: 5055 [2021-06-12 20:37:29,138 INFO L226 Difference]: Without dead ends: 5006 [2021-06-12 20:37:29,139 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1631.9ms TimeCoverageRelationStatistics Valid=243, Invalid=1737, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:37:29,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-06-12 20:37:29,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4233. [2021-06-12 20:37:29,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4233 states, 4232 states have (on average 4.4629017013232515) internal successors, (18887), 4232 states have internal predecessors, (18887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:29,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4233 states to 4233 states and 18887 transitions. [2021-06-12 20:37:29,212 INFO L78 Accepts]: Start accepts. Automaton has 4233 states and 18887 transitions. Word has length 30 [2021-06-12 20:37:29,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:29,212 INFO L482 AbstractCegarLoop]: Abstraction has 4233 states and 18887 transitions. [2021-06-12 20:37:29,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 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) [2021-06-12 20:37:29,212 INFO L276 IsEmpty]: Start isEmpty. Operand 4233 states and 18887 transitions. [2021-06-12 20:37:29,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:29,219 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:29,219 INFO L472 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] [2021-06-12 20:37:29,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-12 20:37:29,420 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:29,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:29,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1222450446, now seen corresponding path program 24 times [2021-06-12 20:37:29,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:29,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175384162] [2021-06-12 20:37:29,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:29,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:29,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175384162] [2021-06-12 20:37:29,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175384162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:29,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459426481] [2021-06-12 20:37:29,674 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 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 [2021-06-12 20:37:29,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:37:29,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:29,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:37:29,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:29,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:29,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:29,956 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 26 treesize of output 32 [2021-06-12 20:37:29,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:29,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:29,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:29,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:66 [2021-06-12 20:37:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:30,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459426481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:30,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:30,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:37:30,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413596806] [2021-06-12 20:37:30,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:37:30,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:30,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:37:30,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:37:30,230 INFO L87 Difference]: Start difference. First operand 4233 states and 18887 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-06-12 20:37:32,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:32,659 INFO L93 Difference]: Finished difference Result 4928 states and 21374 transitions. [2021-06-12 20:37:32,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:37:32,659 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 30 [2021-06-12 20:37:32,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:32,669 INFO L225 Difference]: With dead ends: 4928 [2021-06-12 20:37:32,669 INFO L226 Difference]: Without dead ends: 4797 [2021-06-12 20:37:32,670 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 2052.4ms TimeCoverageRelationStatistics Valid=335, Invalid=2115, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:37:32,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-06-12 20:37:32,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 4246. [2021-06-12 20:37:32,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4246 states, 4245 states have (on average 4.4621908127208485) internal successors, (18942), 4245 states have internal predecessors, (18942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:32,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4246 states to 4246 states and 18942 transitions. [2021-06-12 20:37:32,740 INFO L78 Accepts]: Start accepts. Automaton has 4246 states and 18942 transitions. Word has length 30 [2021-06-12 20:37:32,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:32,740 INFO L482 AbstractCegarLoop]: Abstraction has 4246 states and 18942 transitions. [2021-06-12 20:37:32,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-06-12 20:37:32,741 INFO L276 IsEmpty]: Start isEmpty. Operand 4246 states and 18942 transitions. [2021-06-12 20:37:32,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:32,779 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:32,779 INFO L472 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] [2021-06-12 20:37:32,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-12 20:37:32,979 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:32,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:32,980 INFO L82 PathProgramCache]: Analyzing trace with hash -2134392128, now seen corresponding path program 25 times [2021-06-12 20:37:32,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:32,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727116769] [2021-06-12 20:37:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:33,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:33,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727116769] [2021-06-12 20:37:33,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727116769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:33,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329729831] [2021-06-12 20:37:33,250 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 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 [2021-06-12 20:37:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:33,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:33,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:33,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:33,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:33,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:33,461 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 20:37:33,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:33,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:33,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:33,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:37:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:33,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329729831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:33,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:33,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:37:33,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492446342] [2021-06-12 20:37:33,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:37:33,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:33,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:37:33,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:37:33,540 INFO L87 Difference]: Start difference. First operand 4246 states and 18942 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:34,108 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-06-12 20:37:34,473 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-06-12 20:37:34,598 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-12 20:37:35,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:35,426 INFO L93 Difference]: Finished difference Result 5065 states and 22182 transitions. [2021-06-12 20:37:35,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:37:35,426 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 20:37:35,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:35,438 INFO L225 Difference]: With dead ends: 5065 [2021-06-12 20:37:35,438 INFO L226 Difference]: Without dead ends: 4982 [2021-06-12 20:37:35,439 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1427.2ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:37:35,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2021-06-12 20:37:35,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 4237. [2021-06-12 20:37:35,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4237 states, 4236 states have (on average 4.462936732766761) internal successors, (18905), 4236 states have internal predecessors, (18905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:35,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4237 states to 4237 states and 18905 transitions. [2021-06-12 20:37:35,517 INFO L78 Accepts]: Start accepts. Automaton has 4237 states and 18905 transitions. Word has length 30 [2021-06-12 20:37:35,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:35,517 INFO L482 AbstractCegarLoop]: Abstraction has 4237 states and 18905 transitions. [2021-06-12 20:37:35,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:35,517 INFO L276 IsEmpty]: Start isEmpty. Operand 4237 states and 18905 transitions. [2021-06-12 20:37:35,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:35,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:35,524 INFO L472 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] [2021-06-12 20:37:35,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable262 [2021-06-12 20:37:35,725 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:35,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:35,725 INFO L82 PathProgramCache]: Analyzing trace with hash -840415508, now seen corresponding path program 26 times [2021-06-12 20:37:35,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:35,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116873821] [2021-06-12 20:37:35,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:35,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:35,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116873821] [2021-06-12 20:37:35,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116873821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:35,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997394441] [2021-06-12 20:37:35,963 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 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 [2021-06-12 20:37:35,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:35,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:36,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:37:36,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:36,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:36,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:36,275 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 29 treesize of output 33 [2021-06-12 20:37:36,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:36,331 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.9 percent of original size [2021-06-12 20:37:36,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:37:36,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:80 [2021-06-12 20:37:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:36,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997394441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:36,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:36,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:37:36,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160910058] [2021-06-12 20:37:36,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:37:36,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:36,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:37:36,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:37:36,506 INFO L87 Difference]: Start difference. First operand 4237 states and 18905 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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) [2021-06-12 20:37:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:38,525 INFO L93 Difference]: Finished difference Result 5335 states and 23067 transitions. [2021-06-12 20:37:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:37:38,525 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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 30 [2021-06-12 20:37:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:38,536 INFO L225 Difference]: With dead ends: 5335 [2021-06-12 20:37:38,536 INFO L226 Difference]: Without dead ends: 5117 [2021-06-12 20:37:38,536 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1409.5ms TimeCoverageRelationStatistics Valid=268, Invalid=1624, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:37:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-06-12 20:37:38,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4259. [2021-06-12 20:37:38,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4259 states, 4258 states have (on average 4.4678252700798495) internal successors, (19024), 4258 states have internal predecessors, (19024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:38,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4259 states to 4259 states and 19024 transitions. [2021-06-12 20:37:38,615 INFO L78 Accepts]: Start accepts. Automaton has 4259 states and 19024 transitions. Word has length 30 [2021-06-12 20:37:38,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:38,615 INFO L482 AbstractCegarLoop]: Abstraction has 4259 states and 19024 transitions. [2021-06-12 20:37:38,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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) [2021-06-12 20:37:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 4259 states and 19024 transitions. [2021-06-12 20:37:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:38,622 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:38,622 INFO L472 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] [2021-06-12 20:37:38,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:38,823 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:38,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:38,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1505348430, now seen corresponding path program 21 times [2021-06-12 20:37:38,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:38,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888164344] [2021-06-12 20:37:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:39,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:39,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888164344] [2021-06-12 20:37:39,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888164344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:39,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716511928] [2021-06-12 20:37:39,023 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 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 [2021-06-12 20:37:39,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:37:39,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:39,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:37:39,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:39,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:39,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:39,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:39,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:39,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2021-06-12 20:37:39,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:39,458 INFO L628 ElimStorePlain]: treesize reduction 37, result has 52.6 percent of original size [2021-06-12 20:37:39,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:39,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:50 [2021-06-12 20:37:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:39,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716511928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:39,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:39,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:37:39,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936104610] [2021-06-12 20:37:39,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:37:39,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:39,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:37:39,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:37:39,575 INFO L87 Difference]: Start difference. First operand 4259 states and 19024 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2021-06-12 20:37:41,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:41,648 INFO L93 Difference]: Finished difference Result 5095 states and 22084 transitions. [2021-06-12 20:37:41,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:37:41,648 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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 30 [2021-06-12 20:37:41,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:41,659 INFO L225 Difference]: With dead ends: 5095 [2021-06-12 20:37:41,659 INFO L226 Difference]: Without dead ends: 4933 [2021-06-12 20:37:41,659 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1352.7ms TimeCoverageRelationStatistics Valid=283, Invalid=1973, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:37:41,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4933 states. [2021-06-12 20:37:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4933 to 4259. [2021-06-12 20:37:41,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4259 states, 4258 states have (on average 4.4678252700798495) internal successors, (19024), 4258 states have internal predecessors, (19024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4259 states to 4259 states and 19024 transitions. [2021-06-12 20:37:41,727 INFO L78 Accepts]: Start accepts. Automaton has 4259 states and 19024 transitions. Word has length 30 [2021-06-12 20:37:41,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:41,727 INFO L482 AbstractCegarLoop]: Abstraction has 4259 states and 19024 transitions. [2021-06-12 20:37:41,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2021-06-12 20:37:41,727 INFO L276 IsEmpty]: Start isEmpty. Operand 4259 states and 19024 transitions. [2021-06-12 20:37:41,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:41,734 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:41,734 INFO L472 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] [2021-06-12 20:37:41,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-06-12 20:37:41,935 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:41,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:41,935 INFO L82 PathProgramCache]: Analyzing trace with hash 565109348, now seen corresponding path program 22 times [2021-06-12 20:37:41,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:41,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770888348] [2021-06-12 20:37:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:42,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:42,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770888348] [2021-06-12 20:37:42,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770888348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:42,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895679243] [2021-06-12 20:37:42,177 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 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 [2021-06-12 20:37:42,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:42,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:42,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:42,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:42,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:42,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:42,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:42,397 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 30 treesize of output 16 [2021-06-12 20:37:42,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:42,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:42,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:42,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:37:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:42,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895679243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:42,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:42,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-12 20:37:42,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136345719] [2021-06-12 20:37:42,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:37:42,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:42,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:37:42,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:37:42,458 INFO L87 Difference]: Start difference. First operand 4259 states and 19024 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:37:43,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:43,737 INFO L93 Difference]: Finished difference Result 4880 states and 21466 transitions. [2021-06-12 20:37:43,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:37:43,738 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 30 [2021-06-12 20:37:43,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:43,748 INFO L225 Difference]: With dead ends: 4880 [2021-06-12 20:37:43,748 INFO L226 Difference]: Without dead ends: 4807 [2021-06-12 20:37:43,748 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 876.3ms TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:37:43,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2021-06-12 20:37:43,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 4264. [2021-06-12 20:37:43,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4264 states, 4263 states have (on average 4.4677457189772465) internal successors, (19046), 4263 states have internal predecessors, (19046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:43,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4264 states to 4264 states and 19046 transitions. [2021-06-12 20:37:43,821 INFO L78 Accepts]: Start accepts. Automaton has 4264 states and 19046 transitions. Word has length 30 [2021-06-12 20:37:43,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:43,821 INFO L482 AbstractCegarLoop]: Abstraction has 4264 states and 19046 transitions. [2021-06-12 20:37:43,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:37:43,822 INFO L276 IsEmpty]: Start isEmpty. Operand 4264 states and 19046 transitions. [2021-06-12 20:37:43,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:43,828 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:43,828 INFO L472 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] [2021-06-12 20:37:44,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-12 20:37:44,029 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:44,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:44,029 INFO L82 PathProgramCache]: Analyzing trace with hash 32352366, now seen corresponding path program 23 times [2021-06-12 20:37:44,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:44,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719981023] [2021-06-12 20:37:44,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:44,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:44,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719981023] [2021-06-12 20:37:44,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719981023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:44,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054855888] [2021-06-12 20:37:44,295 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 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 [2021-06-12 20:37:44,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:37:44,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:44,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:44,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:44,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:44,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:44,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:44,605 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 21 treesize of output 45 [2021-06-12 20:37:44,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:44,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:44,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:44,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:239 [2021-06-12 20:37:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:44,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054855888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:44,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:44,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-12 20:37:44,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64130846] [2021-06-12 20:37:44,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:37:44,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:44,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:37:44,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:37:44,800 INFO L87 Difference]: Start difference. First operand 4264 states and 19046 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-06-12 20:37:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:46,112 INFO L93 Difference]: Finished difference Result 5027 states and 22179 transitions. [2021-06-12 20:37:46,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:37:46,113 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 30 [2021-06-12 20:37:46,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:46,123 INFO L225 Difference]: With dead ends: 5027 [2021-06-12 20:37:46,123 INFO L226 Difference]: Without dead ends: 4990 [2021-06-12 20:37:46,124 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1099.1ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:37:46,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4990 states. [2021-06-12 20:37:46,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4990 to 4267. [2021-06-12 20:37:46,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4267 states, 4266 states have (on average 4.46671354899203) internal successors, (19055), 4266 states have internal predecessors, (19055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4267 states to 4267 states and 19055 transitions. [2021-06-12 20:37:46,192 INFO L78 Accepts]: Start accepts. Automaton has 4267 states and 19055 transitions. Word has length 30 [2021-06-12 20:37:46,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:46,192 INFO L482 AbstractCegarLoop]: Abstraction has 4267 states and 19055 transitions. [2021-06-12 20:37:46,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-06-12 20:37:46,192 INFO L276 IsEmpty]: Start isEmpty. Operand 4267 states and 19055 transitions. [2021-06-12 20:37:46,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:46,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:46,199 INFO L472 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] [2021-06-12 20:37:46,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-12 20:37:46,400 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:46,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:46,400 INFO L82 PathProgramCache]: Analyzing trace with hash 913886278, now seen corresponding path program 24 times [2021-06-12 20:37:46,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:46,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289669210] [2021-06-12 20:37:46,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:46,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:46,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289669210] [2021-06-12 20:37:46,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289669210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:46,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250218369] [2021-06-12 20:37:46,649 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 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 [2021-06-12 20:37:46,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:37:46,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:46,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:46,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:46,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:46,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:46,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:46,853 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 25 treesize of output 53 [2021-06-12 20:37:46,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:46,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:46,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:46,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-06-12 20:37:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:47,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250218369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:47,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:47,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:37:47,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91383518] [2021-06-12 20:37:47,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:37:47,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:47,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:37:47,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:37:47,070 INFO L87 Difference]: Start difference. First operand 4267 states and 19055 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-06-12 20:37:49,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:49,234 INFO L93 Difference]: Finished difference Result 5190 states and 22713 transitions. [2021-06-12 20:37:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:37:49,234 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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 30 [2021-06-12 20:37:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:49,245 INFO L225 Difference]: With dead ends: 5190 [2021-06-12 20:37:49,246 INFO L226 Difference]: Without dead ends: 5093 [2021-06-12 20:37:49,246 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1553.9ms TimeCoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:37:49,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5093 states. [2021-06-12 20:37:49,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5093 to 4284. [2021-06-12 20:37:49,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4284 states, 4283 states have (on average 4.46439411627364) internal successors, (19121), 4283 states have internal predecessors, (19121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4284 states to 4284 states and 19121 transitions. [2021-06-12 20:37:49,320 INFO L78 Accepts]: Start accepts. Automaton has 4284 states and 19121 transitions. Word has length 30 [2021-06-12 20:37:49,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:49,321 INFO L482 AbstractCegarLoop]: Abstraction has 4284 states and 19121 transitions. [2021-06-12 20:37:49,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-06-12 20:37:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 4284 states and 19121 transitions. [2021-06-12 20:37:49,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:49,328 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:49,328 INFO L472 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] [2021-06-12 20:37:49,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2021-06-12 20:37:49,529 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:49,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1245689826, now seen corresponding path program 27 times [2021-06-12 20:37:49,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:49,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114032260] [2021-06-12 20:37:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:49,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:49,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114032260] [2021-06-12 20:37:49,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114032260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:49,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005547598] [2021-06-12 20:37:49,809 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 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 [2021-06-12 20:37:49,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:37:49,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:49,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:37:49,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:50,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:50,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:50,107 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 29 treesize of output 33 [2021-06-12 20:37:50,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:50,149 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.9 percent of original size [2021-06-12 20:37:50,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:37:50,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:80 [2021-06-12 20:37:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:50,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005547598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:50,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:50,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:37:50,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097323594] [2021-06-12 20:37:50,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:37:50,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:50,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:37:50,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:37:50,306 INFO L87 Difference]: Start difference. First operand 4284 states and 19121 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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) [2021-06-12 20:37:52,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:52,363 INFO L93 Difference]: Finished difference Result 5631 states and 24074 transitions. [2021-06-12 20:37:52,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:37:52,364 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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 30 [2021-06-12 20:37:52,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:52,375 INFO L225 Difference]: With dead ends: 5631 [2021-06-12 20:37:52,376 INFO L226 Difference]: Without dead ends: 5413 [2021-06-12 20:37:52,376 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1630.4ms TimeCoverageRelationStatistics Valid=288, Invalid=1874, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:37:52,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-06-12 20:37:52,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 4304. [2021-06-12 20:37:52,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 4303 states have (on average 4.466186381594237) internal successors, (19218), 4303 states have internal predecessors, (19218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 19218 transitions. [2021-06-12 20:37:52,456 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 19218 transitions. Word has length 30 [2021-06-12 20:37:52,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:52,457 INFO L482 AbstractCegarLoop]: Abstraction has 4304 states and 19218 transitions. [2021-06-12 20:37:52,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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) [2021-06-12 20:37:52,457 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 19218 transitions. [2021-06-12 20:37:52,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:52,464 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:52,464 INFO L472 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] [2021-06-12 20:37:52,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:52,664 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:52,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:52,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1910622748, now seen corresponding path program 25 times [2021-06-12 20:37:52,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:52,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138133390] [2021-06-12 20:37:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:52,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:52,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138133390] [2021-06-12 20:37:52,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138133390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:52,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423225000] [2021-06-12 20:37:52,859 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 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 [2021-06-12 20:37:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:52,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:52,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:53,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:53,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:53,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:53,118 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 33 treesize of output 17 [2021-06-12 20:37:53,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:53,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:53,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:53,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-12 20:37:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:53,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423225000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:53,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:53,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:37:53,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082485853] [2021-06-12 20:37:53,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:37:53,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:53,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:37:53,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:37:53,171 INFO L87 Difference]: Start difference. First operand 4304 states and 19218 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:37:54,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:54,437 INFO L93 Difference]: Finished difference Result 5375 states and 23515 transitions. [2021-06-12 20:37:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:37:54,437 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-06-12 20:37:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:54,448 INFO L225 Difference]: With dead ends: 5375 [2021-06-12 20:37:54,448 INFO L226 Difference]: Without dead ends: 5284 [2021-06-12 20:37:54,448 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 805.7ms TimeCoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:37:54,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5284 states. [2021-06-12 20:37:54,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5284 to 4316. [2021-06-12 20:37:54,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4316 states, 4315 states have (on average 4.464426419466975) internal successors, (19264), 4315 states have internal predecessors, (19264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:54,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4316 states to 4316 states and 19264 transitions. [2021-06-12 20:37:54,519 INFO L78 Accepts]: Start accepts. Automaton has 4316 states and 19264 transitions. Word has length 30 [2021-06-12 20:37:54,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:54,519 INFO L482 AbstractCegarLoop]: Abstraction has 4316 states and 19264 transitions. [2021-06-12 20:37:54,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:37:54,519 INFO L276 IsEmpty]: Start isEmpty. Operand 4316 states and 19264 transitions. [2021-06-12 20:37:54,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:54,526 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:54,526 INFO L472 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] [2021-06-12 20:37:54,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-12 20:37:54,726 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:54,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:54,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1678906080, now seen corresponding path program 26 times [2021-06-12 20:37:54,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:54,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117935876] [2021-06-12 20:37:54,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:54,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:54,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117935876] [2021-06-12 20:37:54,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117935876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:54,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020918524] [2021-06-12 20:37:54,947 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 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 [2021-06-12 20:37:54,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:54,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:54,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 20:37:54,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:55,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:55,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:55,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:55,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:55,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-12 20:37:55,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:55,279 INFO L628 ElimStorePlain]: treesize reduction 29, result has 52.5 percent of original size [2021-06-12 20:37:55,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:55,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:21 [2021-06-12 20:37:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:55,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020918524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:55,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:55,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:37:55,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228856005] [2021-06-12 20:37:55,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:37:55,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:55,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:37:55,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:37:55,409 INFO L87 Difference]: Start difference. First operand 4316 states and 19264 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-06-12 20:37:57,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:57,117 INFO L93 Difference]: Finished difference Result 5842 states and 25410 transitions. [2021-06-12 20:37:57,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:37:57,117 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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 30 [2021-06-12 20:37:57,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:57,130 INFO L225 Difference]: With dead ends: 5842 [2021-06-12 20:37:57,130 INFO L226 Difference]: Without dead ends: 5705 [2021-06-12 20:37:57,130 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1213.2ms TimeCoverageRelationStatistics Valid=434, Invalid=2322, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:37:57,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5705 states. [2021-06-12 20:37:57,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5705 to 4349. [2021-06-12 20:37:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4349 states, 4348 states have (on average 4.459521619135234) internal successors, (19390), 4348 states have internal predecessors, (19390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4349 states to 4349 states and 19390 transitions. [2021-06-12 20:37:57,212 INFO L78 Accepts]: Start accepts. Automaton has 4349 states and 19390 transitions. Word has length 30 [2021-06-12 20:37:57,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:57,212 INFO L482 AbstractCegarLoop]: Abstraction has 4349 states and 19390 transitions. [2021-06-12 20:37:57,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-06-12 20:37:57,212 INFO L276 IsEmpty]: Start isEmpty. Operand 4349 states and 19390 transitions. [2021-06-12 20:37:57,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:37:57,219 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:57,219 INFO L472 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] [2021-06-12 20:37:57,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:57,421 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:57,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:57,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2109714950, now seen corresponding path program 27 times [2021-06-12 20:37:57,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:57,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675957757] [2021-06-12 20:37:57,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:57,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:57,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675957757] [2021-06-12 20:37:57,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675957757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:57,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900353941] [2021-06-12 20:37:57,643 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 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 [2021-06-12 20:37:57,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:37:57,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:57,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:37:57,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:57,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:57,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:57,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:57,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:57,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2021-06-12 20:37:57,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 20:37:58,017 INFO L628 ElimStorePlain]: treesize reduction 31, result has 57.5 percent of original size [2021-06-12 20:37:58,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:58,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:44 [2021-06-12 20:37:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:58,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900353941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:58,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:58,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:37:58,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607188271] [2021-06-12 20:37:58,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:37:58,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:58,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:37:58,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:37:58,160 INFO L87 Difference]: Start difference. First operand 4349 states and 19390 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2021-06-12 20:38:00,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:00,160 INFO L93 Difference]: Finished difference Result 5104 states and 22142 transitions. [2021-06-12 20:38:00,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:38:00,160 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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 30 [2021-06-12 20:38:00,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:00,171 INFO L225 Difference]: With dead ends: 5104 [2021-06-12 20:38:00,171 INFO L226 Difference]: Without dead ends: 4942 [2021-06-12 20:38:00,172 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1362.6ms TimeCoverageRelationStatistics Valid=289, Invalid=1873, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:38:00,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4942 states. [2021-06-12 20:38:00,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4942 to 4339. [2021-06-12 20:38:00,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4339 states, 4338 states have (on average 4.461041954817889) internal successors, (19352), 4338 states have internal predecessors, (19352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:00,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4339 states to 4339 states and 19352 transitions. [2021-06-12 20:38:00,248 INFO L78 Accepts]: Start accepts. Automaton has 4339 states and 19352 transitions. Word has length 30 [2021-06-12 20:38:00,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:00,248 INFO L482 AbstractCegarLoop]: Abstraction has 4339 states and 19352 transitions. [2021-06-12 20:38:00,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2021-06-12 20:38:00,248 INFO L276 IsEmpty]: Start isEmpty. Operand 4339 states and 19352 transitions. [2021-06-12 20:38:00,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:00,255 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:00,255 INFO L472 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] [2021-06-12 20:38:00,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:00,456 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:00,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:00,456 INFO L82 PathProgramCache]: Analyzing trace with hash -836008190, now seen corresponding path program 28 times [2021-06-12 20:38:00,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:00,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765599436] [2021-06-12 20:38:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:00,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:00,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765599436] [2021-06-12 20:38:00,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765599436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:00,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319146518] [2021-06-12 20:38:00,723 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 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 [2021-06-12 20:38:00,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:38:00,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:00,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:00,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:00,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:00,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:00,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:00,934 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 30 treesize of output 16 [2021-06-12 20:38:00,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:00,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:00,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:00,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:38:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:01,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319146518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:01,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:01,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-12 20:38:01,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35437768] [2021-06-12 20:38:01,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:38:01,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:01,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:38:01,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:38:01,031 INFO L87 Difference]: Start difference. First operand 4339 states and 19352 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:38:02,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:02,190 INFO L93 Difference]: Finished difference Result 4835 states and 21285 transitions. [2021-06-12 20:38:02,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:38:02,190 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 30 [2021-06-12 20:38:02,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:02,200 INFO L225 Difference]: With dead ends: 4835 [2021-06-12 20:38:02,200 INFO L226 Difference]: Without dead ends: 4762 [2021-06-12 20:38:02,200 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 929.0ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:38:02,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4762 states. [2021-06-12 20:38:02,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4762 to 4351. [2021-06-12 20:38:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4351 states, 4350 states have (on average 4.46) internal successors, (19401), 4350 states have internal predecessors, (19401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:02,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4351 states to 4351 states and 19401 transitions. [2021-06-12 20:38:02,276 INFO L78 Accepts]: Start accepts. Automaton has 4351 states and 19401 transitions. Word has length 30 [2021-06-12 20:38:02,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:02,276 INFO L482 AbstractCegarLoop]: Abstraction has 4351 states and 19401 transitions. [2021-06-12 20:38:02,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:38:02,276 INFO L276 IsEmpty]: Start isEmpty. Operand 4351 states and 19401 transitions. [2021-06-12 20:38:02,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:02,283 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:02,283 INFO L472 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] [2021-06-12 20:38:02,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-12 20:38:02,484 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:02,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:02,484 INFO L82 PathProgramCache]: Analyzing trace with hash 2063372030, now seen corresponding path program 29 times [2021-06-12 20:38:02,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:02,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269672374] [2021-06-12 20:38:02,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:02,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:02,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269672374] [2021-06-12 20:38:02,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269672374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:02,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168101201] [2021-06-12 20:38:02,767 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 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 [2021-06-12 20:38:02,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:38:02,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:02,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:02,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:02,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:02,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:02,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:02,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-12 20:38:02,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:02,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:03,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:03,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:220 [2021-06-12 20:38:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:03,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168101201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:03,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:03,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:38:03,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717029984] [2021-06-12 20:38:03,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:38:03,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:03,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:38:03,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:38:03,205 INFO L87 Difference]: Start difference. First operand 4351 states and 19401 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 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) [2021-06-12 20:38:04,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:04,763 INFO L93 Difference]: Finished difference Result 5039 states and 22207 transitions. [2021-06-12 20:38:04,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:38:04,763 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 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 30 [2021-06-12 20:38:04,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:04,774 INFO L225 Difference]: With dead ends: 5039 [2021-06-12 20:38:04,774 INFO L226 Difference]: Without dead ends: 4976 [2021-06-12 20:38:04,774 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1195.0ms TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:38:04,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-06-12 20:38:04,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 4352. [2021-06-12 20:38:04,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 4351 states have (on average 4.459664444955183) internal successors, (19404), 4351 states have internal predecessors, (19404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:04,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 19404 transitions. [2021-06-12 20:38:04,843 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 19404 transitions. Word has length 30 [2021-06-12 20:38:04,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:04,843 INFO L482 AbstractCegarLoop]: Abstraction has 4352 states and 19404 transitions. [2021-06-12 20:38:04,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 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) [2021-06-12 20:38:04,843 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 19404 transitions. [2021-06-12 20:38:04,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:04,850 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:04,850 INFO L472 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] [2021-06-12 20:38:05,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:05,050 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:05,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:05,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1699668444, now seen corresponding path program 30 times [2021-06-12 20:38:05,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:05,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955561160] [2021-06-12 20:38:05,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:05,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:05,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955561160] [2021-06-12 20:38:05,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955561160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:05,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945930580] [2021-06-12 20:38:05,313 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 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 [2021-06-12 20:38:05,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:38:05,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:05,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:38:05,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:05,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:05,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:05,523 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 26 treesize of output 32 [2021-06-12 20:38:05,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:05,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:05,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:05,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-06-12 20:38:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:05,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945930580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:05,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:05,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:38:05,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204915452] [2021-06-12 20:38:05,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:05,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:05,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:05,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:05,764 INFO L87 Difference]: Start difference. First operand 4352 states and 19404 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-06-12 20:38:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:08,018 INFO L93 Difference]: Finished difference Result 4881 states and 21439 transitions. [2021-06-12 20:38:08,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:38:08,018 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 30 [2021-06-12 20:38:08,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:08,031 INFO L225 Difference]: With dead ends: 4881 [2021-06-12 20:38:08,031 INFO L226 Difference]: Without dead ends: 4791 [2021-06-12 20:38:08,031 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1456.2ms TimeCoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:38:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4791 states. [2021-06-12 20:38:08,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4791 to 4357. [2021-06-12 20:38:08,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4357 states, 4356 states have (on average 4.459595959595959) internal successors, (19426), 4356 states have internal predecessors, (19426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:08,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4357 states to 4357 states and 19426 transitions. [2021-06-12 20:38:08,100 INFO L78 Accepts]: Start accepts. Automaton has 4357 states and 19426 transitions. Word has length 30 [2021-06-12 20:38:08,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:08,100 INFO L482 AbstractCegarLoop]: Abstraction has 4357 states and 19426 transitions. [2021-06-12 20:38:08,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-06-12 20:38:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 4357 states and 19426 transitions. [2021-06-12 20:38:08,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:08,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:08,107 INFO L472 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] [2021-06-12 20:38:08,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-12 20:38:08,308 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:08,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:08,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1166911462, now seen corresponding path program 31 times [2021-06-12 20:38:08,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:08,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186617328] [2021-06-12 20:38:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:08,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:08,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186617328] [2021-06-12 20:38:08,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186617328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:08,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578761152] [2021-06-12 20:38:08,572 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 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 [2021-06-12 20:38:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:08,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:08,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:08,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:08,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:08,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:08,811 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 30 treesize of output 16 [2021-06-12 20:38:08,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:08,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:08,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:08,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:38:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:08,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578761152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:08,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:08,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-12 20:38:08,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156590714] [2021-06-12 20:38:08,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:38:08,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:08,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:38:08,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:38:08,887 INFO L87 Difference]: Start difference. First operand 4357 states and 19426 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:38:09,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:09,662 INFO L93 Difference]: Finished difference Result 4973 states and 21853 transitions. [2021-06-12 20:38:09,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:38:09,662 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 30 [2021-06-12 20:38:09,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:09,673 INFO L225 Difference]: With dead ends: 4973 [2021-06-12 20:38:09,673 INFO L226 Difference]: Without dead ends: 4899 [2021-06-12 20:38:09,673 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 631.6ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:38:09,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-06-12 20:38:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4352. [2021-06-12 20:38:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 4351 states have (on average 4.459664444955183) internal successors, (19404), 4351 states have internal predecessors, (19404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 19404 transitions. [2021-06-12 20:38:09,750 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 19404 transitions. Word has length 30 [2021-06-12 20:38:09,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:09,751 INFO L482 AbstractCegarLoop]: Abstraction has 4352 states and 19404 transitions. [2021-06-12 20:38:09,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:38:09,751 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 19404 transitions. [2021-06-12 20:38:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:09,758 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:09,758 INFO L472 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] [2021-06-12 20:38:09,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:09,958 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:09,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:09,959 INFO L82 PathProgramCache]: Analyzing trace with hash -678823322, now seen corresponding path program 32 times [2021-06-12 20:38:09,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:09,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333212851] [2021-06-12 20:38:09,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:10,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:10,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333212851] [2021-06-12 20:38:10,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333212851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:10,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289867008] [2021-06-12 20:38:10,187 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 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 [2021-06-12 20:38:10,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:10,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:10,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:38:10,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:10,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:10,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:10,385 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 26 treesize of output 32 [2021-06-12 20:38:10,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:10,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:10,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:10,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-06-12 20:38:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:10,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289867008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:10,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:10,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:38:10,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566407091] [2021-06-12 20:38:10,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:10,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:10,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:10,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:10,698 INFO L87 Difference]: Start difference. First operand 4352 states and 19404 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-06-12 20:38:12,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:12,732 INFO L93 Difference]: Finished difference Result 4883 states and 21378 transitions. [2021-06-12 20:38:12,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:38:12,732 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 30 [2021-06-12 20:38:12,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:12,742 INFO L225 Difference]: With dead ends: 4883 [2021-06-12 20:38:12,743 INFO L226 Difference]: Without dead ends: 4786 [2021-06-12 20:38:12,743 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1647.5ms TimeCoverageRelationStatistics Valid=254, Invalid=1638, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:38:12,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-06-12 20:38:12,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 4354. [2021-06-12 20:38:12,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 4353 states have (on average 4.4601424305076955) internal successors, (19415), 4353 states have internal predecessors, (19415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 19415 transitions. [2021-06-12 20:38:12,840 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 19415 transitions. Word has length 30 [2021-06-12 20:38:12,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:12,840 INFO L482 AbstractCegarLoop]: Abstraction has 4354 states and 19415 transitions. [2021-06-12 20:38:12,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-06-12 20:38:12,840 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 19415 transitions. [2021-06-12 20:38:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:12,847 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:12,847 INFO L472 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] [2021-06-12 20:38:13,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-12 20:38:13,048 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:13,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:13,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1065540684, now seen corresponding path program 33 times [2021-06-12 20:38:13,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:13,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057564458] [2021-06-12 20:38:13,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:13,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:13,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057564458] [2021-06-12 20:38:13,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057564458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:13,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156316231] [2021-06-12 20:38:13,312 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 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 [2021-06-12 20:38:13,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:38:13,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:13,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:38:13,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:13,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:13,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:13,528 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 26 treesize of output 32 [2021-06-12 20:38:13,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:13,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:13,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:13,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-06-12 20:38:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:13,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156316231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:13,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:13,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:38:13,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295337228] [2021-06-12 20:38:13,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:13,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:13,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:13,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:13,817 INFO L87 Difference]: Start difference. First operand 4354 states and 19415 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-06-12 20:38:16,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:16,071 INFO L93 Difference]: Finished difference Result 4807 states and 21085 transitions. [2021-06-12 20:38:16,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:38:16,071 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 30 [2021-06-12 20:38:16,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:16,081 INFO L225 Difference]: With dead ends: 4807 [2021-06-12 20:38:16,081 INFO L226 Difference]: Without dead ends: 4726 [2021-06-12 20:38:16,082 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1681.0ms TimeCoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:38:16,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4726 states. [2021-06-12 20:38:16,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4726 to 4350. [2021-06-12 20:38:16,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4350 states, 4349 states have (on average 4.460335709358473) internal successors, (19398), 4349 states have internal predecessors, (19398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4350 states to 4350 states and 19398 transitions. [2021-06-12 20:38:16,149 INFO L78 Accepts]: Start accepts. Automaton has 4350 states and 19398 transitions. Word has length 30 [2021-06-12 20:38:16,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:16,149 INFO L482 AbstractCegarLoop]: Abstraction has 4350 states and 19398 transitions. [2021-06-12 20:38:16,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-06-12 20:38:16,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4350 states and 19398 transitions. [2021-06-12 20:38:16,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:16,156 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:16,156 INFO L472 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] [2021-06-12 20:38:16,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:16,356 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:16,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:16,357 INFO L82 PathProgramCache]: Analyzing trace with hash 254880366, now seen corresponding path program 34 times [2021-06-12 20:38:16,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:16,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074932774] [2021-06-12 20:38:16,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:16,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:16,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074932774] [2021-06-12 20:38:16,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074932774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:16,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562939049] [2021-06-12 20:38:16,579 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 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 [2021-06-12 20:38:16,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:38:16,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:16,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:16,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:16,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:16,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:16,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:16,792 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 30 treesize of output 16 [2021-06-12 20:38:16,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:16,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:16,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:16,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:38:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:16,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562939049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:16,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:16,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-12 20:38:16,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658576064] [2021-06-12 20:38:16,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:38:16,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:16,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:38:16,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:38:16,833 INFO L87 Difference]: Start difference. First operand 4350 states and 19398 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:38:17,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:17,961 INFO L93 Difference]: Finished difference Result 5100 states and 22309 transitions. [2021-06-12 20:38:17,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:38:17,961 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 30 [2021-06-12 20:38:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:17,972 INFO L225 Difference]: With dead ends: 5100 [2021-06-12 20:38:17,972 INFO L226 Difference]: Without dead ends: 5043 [2021-06-12 20:38:17,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 739.9ms TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:38:17,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5043 states. [2021-06-12 20:38:18,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5043 to 4351. [2021-06-12 20:38:18,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4351 states, 4350 states have (on average 4.465287356321839) internal successors, (19424), 4350 states have internal predecessors, (19424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:18,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4351 states to 4351 states and 19424 transitions. [2021-06-12 20:38:18,051 INFO L78 Accepts]: Start accepts. Automaton has 4351 states and 19424 transitions. Word has length 30 [2021-06-12 20:38:18,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:18,051 INFO L482 AbstractCegarLoop]: Abstraction has 4351 states and 19424 transitions. [2021-06-12 20:38:18,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:38:18,051 INFO L276 IsEmpty]: Start isEmpty. Operand 4351 states and 19424 transitions. [2021-06-12 20:38:18,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:18,058 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:18,058 INFO L472 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] [2021-06-12 20:38:18,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-12 20:38:18,261 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:18,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:18,261 INFO L82 PathProgramCache]: Analyzing trace with hash 969357380, now seen corresponding path program 35 times [2021-06-12 20:38:18,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:18,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013368105] [2021-06-12 20:38:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:18,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:18,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013368105] [2021-06-12 20:38:18,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013368105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:18,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153731285] [2021-06-12 20:38:18,507 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 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 [2021-06-12 20:38:18,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:38:18,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:18,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:18,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:18,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:18,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:18,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:18,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-12 20:38:18,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:18,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:18,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:18,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:220 [2021-06-12 20:38:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:18,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153731285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:18,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:18,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:38:18,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137690192] [2021-06-12 20:38:18,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:38:18,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:18,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:38:18,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:38:18,953 INFO L87 Difference]: Start difference. First operand 4351 states and 19424 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 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) [2021-06-12 20:38:19,855 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-12 20:38:20,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:20,667 INFO L93 Difference]: Finished difference Result 5082 states and 22380 transitions. [2021-06-12 20:38:20,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:38:20,668 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 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 30 [2021-06-12 20:38:20,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:20,679 INFO L225 Difference]: With dead ends: 5082 [2021-06-12 20:38:20,679 INFO L226 Difference]: Without dead ends: 5019 [2021-06-12 20:38:20,680 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1357.3ms TimeCoverageRelationStatistics Valid=256, Invalid=1814, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:38:20,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5019 states. [2021-06-12 20:38:20,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5019 to 4350. [2021-06-12 20:38:20,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4350 states, 4349 states have (on average 4.46562428144401) internal successors, (19421), 4349 states have internal predecessors, (19421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:20,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4350 states to 4350 states and 19421 transitions. [2021-06-12 20:38:20,754 INFO L78 Accepts]: Start accepts. Automaton has 4350 states and 19421 transitions. Word has length 30 [2021-06-12 20:38:20,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:20,754 INFO L482 AbstractCegarLoop]: Abstraction has 4350 states and 19421 transitions. [2021-06-12 20:38:20,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 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) [2021-06-12 20:38:20,754 INFO L276 IsEmpty]: Start isEmpty. Operand 4350 states and 19421 transitions. [2021-06-12 20:38:20,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:20,761 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:20,761 INFO L472 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] [2021-06-12 20:38:20,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-12 20:38:20,962 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:20,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:20,962 INFO L82 PathProgramCache]: Analyzing trace with hash -2111173892, now seen corresponding path program 36 times [2021-06-12 20:38:20,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:20,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220145420] [2021-06-12 20:38:20,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:21,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:21,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220145420] [2021-06-12 20:38:21,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220145420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:21,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699829997] [2021-06-12 20:38:21,233 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 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 [2021-06-12 20:38:21,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:38:21,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:21,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:21,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:21,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:21,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:21,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:21,407 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 25 treesize of output 53 [2021-06-12 20:38:21,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:21,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:21,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:21,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-06-12 20:38:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:21,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699829997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:21,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:21,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:38:21,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058654069] [2021-06-12 20:38:21,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:38:21,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:21,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:38:21,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:38:21,619 INFO L87 Difference]: Start difference. First operand 4350 states and 19421 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:38:23,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:23,229 INFO L93 Difference]: Finished difference Result 5611 states and 24398 transitions. [2021-06-12 20:38:23,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:38:23,229 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-06-12 20:38:23,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:23,241 INFO L225 Difference]: With dead ends: 5611 [2021-06-12 20:38:23,241 INFO L226 Difference]: Without dead ends: 5512 [2021-06-12 20:38:23,241 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1179.2ms TimeCoverageRelationStatistics Valid=253, Invalid=1727, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:38:23,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5512 states. [2021-06-12 20:38:23,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5512 to 4338. [2021-06-12 20:38:23,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4338 states, 4337 states have (on average 4.466682038275305) internal successors, (19372), 4337 states have internal predecessors, (19372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:23,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 19372 transitions. [2021-06-12 20:38:23,319 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 19372 transitions. Word has length 30 [2021-06-12 20:38:23,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:23,319 INFO L482 AbstractCegarLoop]: Abstraction has 4338 states and 19372 transitions. [2021-06-12 20:38:23,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:38:23,319 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 19372 transitions. [2021-06-12 20:38:23,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:23,326 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:23,326 INFO L472 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] [2021-06-12 20:38:23,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-12 20:38:23,526 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:23,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:23,526 INFO L82 PathProgramCache]: Analyzing trace with hash -895800388, now seen corresponding path program 1 times [2021-06-12 20:38:23,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:23,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105858181] [2021-06-12 20:38:23,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:23,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:23,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105858181] [2021-06-12 20:38:23,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105858181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:23,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010175826] [2021-06-12 20:38:23,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-12 20:38:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:23,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:23,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:23,837 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 [2021-06-12 20:38:23,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:23,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:23,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:23,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:38:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:23,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010175826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:23,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:23,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:38:23,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909753976] [2021-06-12 20:38:23,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:38:23,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:23,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:38:23,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:38:23,891 INFO L87 Difference]: Start difference. First operand 4338 states and 19372 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:38:25,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:25,265 INFO L93 Difference]: Finished difference Result 5698 states and 24891 transitions. [2021-06-12 20:38:25,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:38:25,265 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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 30 [2021-06-12 20:38:25,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:25,277 INFO L225 Difference]: With dead ends: 5698 [2021-06-12 20:38:25,277 INFO L226 Difference]: Without dead ends: 5616 [2021-06-12 20:38:25,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 923.1ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:38:25,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5616 states. [2021-06-12 20:38:25,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5616 to 4370. [2021-06-12 20:38:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4370 states, 4369 states have (on average 4.465552758068208) internal successors, (19510), 4369 states have internal predecessors, (19510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4370 states to 4370 states and 19510 transitions. [2021-06-12 20:38:25,354 INFO L78 Accepts]: Start accepts. Automaton has 4370 states and 19510 transitions. Word has length 30 [2021-06-12 20:38:25,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:25,354 INFO L482 AbstractCegarLoop]: Abstraction has 4370 states and 19510 transitions. [2021-06-12 20:38:25,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:38:25,354 INFO L276 IsEmpty]: Start isEmpty. Operand 4370 states and 19510 transitions. [2021-06-12 20:38:25,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:25,361 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:25,362 INFO L472 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] [2021-06-12 20:38:25,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-06-12 20:38:25,562 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:25,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:25,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1616233856, now seen corresponding path program 2 times [2021-06-12 20:38:25,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:25,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719434694] [2021-06-12 20:38:25,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:25,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:25,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719434694] [2021-06-12 20:38:25,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719434694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:25,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795522071] [2021-06-12 20:38:25,717 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 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 [2021-06-12 20:38:25,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:25,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:25,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:25,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:25,874 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 [2021-06-12 20:38:25,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:25,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:25,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:25,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:38:25,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:25,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795522071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:25,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:25,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:38:25,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922312152] [2021-06-12 20:38:25,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:38:25,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:25,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:38:25,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:38:25,934 INFO L87 Difference]: Start difference. First operand 4370 states and 19510 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:38:27,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:27,368 INFO L93 Difference]: Finished difference Result 5938 states and 25890 transitions. [2021-06-12 20:38:27,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:38:27,369 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-06-12 20:38:27,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:27,382 INFO L225 Difference]: With dead ends: 5938 [2021-06-12 20:38:27,382 INFO L226 Difference]: Without dead ends: 5865 [2021-06-12 20:38:27,382 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1018.3ms TimeCoverageRelationStatistics Valid=385, Invalid=1871, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:38:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5865 states. [2021-06-12 20:38:27,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5865 to 4363. [2021-06-12 20:38:27,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4363 states, 4362 states have (on average 4.466758367721229) internal successors, (19484), 4362 states have internal predecessors, (19484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:27,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4363 states to 4363 states and 19484 transitions. [2021-06-12 20:38:27,467 INFO L78 Accepts]: Start accepts. Automaton has 4363 states and 19484 transitions. Word has length 30 [2021-06-12 20:38:27,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:27,467 INFO L482 AbstractCegarLoop]: Abstraction has 4363 states and 19484 transitions. [2021-06-12 20:38:27,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:38:27,467 INFO L276 IsEmpty]: Start isEmpty. Operand 4363 states and 19484 transitions. [2021-06-12 20:38:27,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:27,475 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:27,475 INFO L472 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] [2021-06-12 20:38:27,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-12 20:38:27,675 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:27,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:27,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1480628418, now seen corresponding path program 3 times [2021-06-12 20:38:27,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:27,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063095949] [2021-06-12 20:38:27,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:27,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:27,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063095949] [2021-06-12 20:38:27,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063095949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:27,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215976098] [2021-06-12 20:38:27,868 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 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 [2021-06-12 20:38:27,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:38:27,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:27,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:38:27,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:28,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:28,067 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 [2021-06-12 20:38:28,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:28,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:28,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:28,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:38:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:28,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215976098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:28,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:28,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:38:28,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907403437] [2021-06-12 20:38:28,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:38:28,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:28,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:38:28,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:38:28,149 INFO L87 Difference]: Start difference. First operand 4363 states and 19484 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2021-06-12 20:38:30,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:30,581 INFO L93 Difference]: Finished difference Result 6271 states and 26892 transitions. [2021-06-12 20:38:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 20:38:30,581 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 30 [2021-06-12 20:38:30,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:30,595 INFO L225 Difference]: With dead ends: 6271 [2021-06-12 20:38:30,595 INFO L226 Difference]: Without dead ends: 6040 [2021-06-12 20:38:30,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1709.9ms TimeCoverageRelationStatistics Valid=511, Invalid=2681, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:38:30,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6040 states. [2021-06-12 20:38:30,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6040 to 4371. [2021-06-12 20:38:30,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 4370 states have (on average 4.467276887871853) internal successors, (19522), 4370 states have internal predecessors, (19522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:30,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 19522 transitions. [2021-06-12 20:38:30,685 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 19522 transitions. Word has length 30 [2021-06-12 20:38:30,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:30,685 INFO L482 AbstractCegarLoop]: Abstraction has 4371 states and 19522 transitions. [2021-06-12 20:38:30,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2021-06-12 20:38:30,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 19522 transitions. [2021-06-12 20:38:30,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:30,693 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:30,693 INFO L472 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, 1] [2021-06-12 20:38:30,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:30,893 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:30,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:30,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1509599484, now seen corresponding path program 1 times [2021-06-12 20:38:30,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:30,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564134245] [2021-06-12 20:38:30,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:31,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:31,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564134245] [2021-06-12 20:38:31,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564134245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:31,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650812472] [2021-06-12 20:38:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-12 20:38:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:31,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:31,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:31,254 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 [2021-06-12 20:38:31,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:31,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:31,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:31,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:38:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:31,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650812472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:31,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:31,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:38:31,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143485741] [2021-06-12 20:38:31,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:31,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:31,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:31,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:31,291 INFO L87 Difference]: Start difference. First operand 4371 states and 19522 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:38:33,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:33,121 INFO L93 Difference]: Finished difference Result 5842 states and 25460 transitions. [2021-06-12 20:38:33,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:38:33,122 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 30 [2021-06-12 20:38:33,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:33,134 INFO L225 Difference]: With dead ends: 5842 [2021-06-12 20:38:33,134 INFO L226 Difference]: Without dead ends: 5690 [2021-06-12 20:38:33,134 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1191.6ms TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:38:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5690 states. [2021-06-12 20:38:33,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5690 to 4371. [2021-06-12 20:38:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 4370 states have (on average 4.467276887871853) internal successors, (19522), 4370 states have internal predecessors, (19522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 19522 transitions. [2021-06-12 20:38:33,234 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 19522 transitions. Word has length 30 [2021-06-12 20:38:33,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:33,234 INFO L482 AbstractCegarLoop]: Abstraction has 4371 states and 19522 transitions. [2021-06-12 20:38:33,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:38:33,234 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 19522 transitions. [2021-06-12 20:38:33,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:33,241 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:33,241 INFO L472 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, 1] [2021-06-12 20:38:33,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:33,441 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:33,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:33,442 INFO L82 PathProgramCache]: Analyzing trace with hash -692523458, now seen corresponding path program 2 times [2021-06-12 20:38:33,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:33,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108297306] [2021-06-12 20:38:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:33,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:33,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108297306] [2021-06-12 20:38:33,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108297306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:33,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436653275] [2021-06-12 20:38:33,576 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 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 [2021-06-12 20:38:33,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:33,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:33,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:33,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:33,739 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 [2021-06-12 20:38:33,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:33,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:33,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:33,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:38:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:33,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436653275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:33,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:33,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:38:33,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364665465] [2021-06-12 20:38:33,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:38:33,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:33,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:38:33,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:38:33,794 INFO L87 Difference]: Start difference. First operand 4371 states and 19522 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:38:35,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:35,398 INFO L93 Difference]: Finished difference Result 5490 states and 24064 transitions. [2021-06-12 20:38:35,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:38:35,398 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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 30 [2021-06-12 20:38:35,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:35,410 INFO L225 Difference]: With dead ends: 5490 [2021-06-12 20:38:35,410 INFO L226 Difference]: Without dead ends: 5417 [2021-06-12 20:38:35,411 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1091.4ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:38:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5417 states. [2021-06-12 20:38:35,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5417 to 4380. [2021-06-12 20:38:35,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 4379 states have (on average 4.466773235898607) internal successors, (19560), 4379 states have internal predecessors, (19560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:35,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 19560 transitions. [2021-06-12 20:38:35,490 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 19560 transitions. Word has length 30 [2021-06-12 20:38:35,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:35,490 INFO L482 AbstractCegarLoop]: Abstraction has 4380 states and 19560 transitions. [2021-06-12 20:38:35,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:38:35,490 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 19560 transitions. [2021-06-12 20:38:35,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:35,497 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:35,497 INFO L472 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, 1] [2021-06-12 20:38:35,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:35,698 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:35,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:35,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1117630490, now seen corresponding path program 3 times [2021-06-12 20:38:35,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:35,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385516938] [2021-06-12 20:38:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:35,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:35,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385516938] [2021-06-12 20:38:35,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385516938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:35,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266383549] [2021-06-12 20:38:35,855 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 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 [2021-06-12 20:38:35,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:38:35,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:35,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:38:35,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:36,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:36,043 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 [2021-06-12 20:38:36,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:36,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:36,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:36,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:38:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:36,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266383549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:36,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:36,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:38:36,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549666290] [2021-06-12 20:38:36,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:38:36,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:36,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:38:36,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:38:36,115 INFO L87 Difference]: Start difference. First operand 4380 states and 19560 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:38:37,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:37,504 INFO L93 Difference]: Finished difference Result 5535 states and 24294 transitions. [2021-06-12 20:38:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:38:37,505 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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 30 [2021-06-12 20:38:37,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:37,517 INFO L225 Difference]: With dead ends: 5535 [2021-06-12 20:38:37,517 INFO L226 Difference]: Without dead ends: 5456 [2021-06-12 20:38:37,518 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 960.4ms TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:38:37,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5456 states. [2021-06-12 20:38:37,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5456 to 4368. [2021-06-12 20:38:37,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4368 states, 4367 states have (on average 4.468055873597435) internal successors, (19512), 4367 states have internal predecessors, (19512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:37,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4368 states to 4368 states and 19512 transitions. [2021-06-12 20:38:37,598 INFO L78 Accepts]: Start accepts. Automaton has 4368 states and 19512 transitions. Word has length 30 [2021-06-12 20:38:37,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:37,598 INFO L482 AbstractCegarLoop]: Abstraction has 4368 states and 19512 transitions. [2021-06-12 20:38:37,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:38:37,598 INFO L276 IsEmpty]: Start isEmpty. Operand 4368 states and 19512 transitions. [2021-06-12 20:38:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:37,605 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:37,605 INFO L472 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] [2021-06-12 20:38:37,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-06-12 20:38:37,806 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:37,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:37,806 INFO L82 PathProgramCache]: Analyzing trace with hash -626484544, now seen corresponding path program 4 times [2021-06-12 20:38:37,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:37,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065199743] [2021-06-12 20:38:37,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:37,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:37,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065199743] [2021-06-12 20:38:37,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065199743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:37,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927858762] [2021-06-12 20:38:37,969 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 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 [2021-06-12 20:38:38,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:38:38,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:38,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:38,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:38,159 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 [2021-06-12 20:38:38,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:38,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:38,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:38,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:38:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:38,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927858762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:38,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:38,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:38:38,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340783491] [2021-06-12 20:38:38,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:38,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:38,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:38,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:38,199 INFO L87 Difference]: Start difference. First operand 4368 states and 19512 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-06-12 20:38:39,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:39,711 INFO L93 Difference]: Finished difference Result 6124 states and 26559 transitions. [2021-06-12 20:38:39,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:38:39,711 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 30 [2021-06-12 20:38:39,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:39,725 INFO L225 Difference]: With dead ends: 6124 [2021-06-12 20:38:39,725 INFO L226 Difference]: Without dead ends: 5972 [2021-06-12 20:38:39,725 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 999.2ms TimeCoverageRelationStatistics Valid=310, Invalid=1670, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:38:39,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5972 states. [2021-06-12 20:38:39,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5972 to 4384. [2021-06-12 20:38:39,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 4383 states have (on average 4.469085101528633) internal successors, (19588), 4383 states have internal predecessors, (19588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 19588 transitions. [2021-06-12 20:38:39,807 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 19588 transitions. Word has length 30 [2021-06-12 20:38:39,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:39,807 INFO L482 AbstractCegarLoop]: Abstraction has 4384 states and 19588 transitions. [2021-06-12 20:38:39,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-06-12 20:38:39,807 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 19588 transitions. [2021-06-12 20:38:39,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:39,815 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:39,815 INFO L472 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, 1] [2021-06-12 20:38:40,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-12 20:38:40,015 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:40,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:40,016 INFO L82 PathProgramCache]: Analyzing trace with hash 678254850, now seen corresponding path program 4 times [2021-06-12 20:38:40,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:40,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461581552] [2021-06-12 20:38:40,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:40,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:40,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461581552] [2021-06-12 20:38:40,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461581552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:40,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612396337] [2021-06-12 20:38:40,188 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 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 [2021-06-12 20:38:40,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:38:40,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:40,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:40,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:40,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-12 20:38:40,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:40,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:40,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:40,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:38:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:40,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612396337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:40,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:40,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:38:40,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317231250] [2021-06-12 20:38:40,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:40,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:40,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:40,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:40,411 INFO L87 Difference]: Start difference. First operand 4384 states and 19588 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:38:42,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:42,065 INFO L93 Difference]: Finished difference Result 5922 states and 25776 transitions. [2021-06-12 20:38:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:38:42,065 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 30 [2021-06-12 20:38:42,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:42,078 INFO L225 Difference]: With dead ends: 5922 [2021-06-12 20:38:42,078 INFO L226 Difference]: Without dead ends: 5770 [2021-06-12 20:38:42,078 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1033.6ms TimeCoverageRelationStatistics Valid=290, Invalid=1690, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:38:42,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5770 states. [2021-06-12 20:38:42,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5770 to 4392. [2021-06-12 20:38:42,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4392 states, 4391 states have (on average 4.465953085857436) internal successors, (19610), 4391 states have internal predecessors, (19610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:42,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4392 states to 4392 states and 19610 transitions. [2021-06-12 20:38:42,160 INFO L78 Accepts]: Start accepts. Automaton has 4392 states and 19610 transitions. Word has length 30 [2021-06-12 20:38:42,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:42,160 INFO L482 AbstractCegarLoop]: Abstraction has 4392 states and 19610 transitions. [2021-06-12 20:38:42,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:38:42,160 INFO L276 IsEmpty]: Start isEmpty. Operand 4392 states and 19610 transitions. [2021-06-12 20:38:42,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:42,168 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:42,168 INFO L472 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, 1] [2021-06-12 20:38:42,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-12 20:38:42,368 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:42,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:42,369 INFO L82 PathProgramCache]: Analyzing trace with hash -748987048, now seen corresponding path program 5 times [2021-06-12 20:38:42,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:42,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949258120] [2021-06-12 20:38:42,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:42,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:42,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949258120] [2021-06-12 20:38:42,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949258120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:42,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962096254] [2021-06-12 20:38:42,513 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 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 [2021-06-12 20:38:42,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:38:42,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:42,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:42,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:42,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:42,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:42,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:42,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-12 20:38:42,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:38:42,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:42,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:42,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:20 [2021-06-12 20:38:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:42,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962096254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:42,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:42,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:38:42,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664172205] [2021-06-12 20:38:42,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:38:42,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:42,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:38:42,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:38:42,808 INFO L87 Difference]: Start difference. First operand 4392 states and 19610 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-06-12 20:38:44,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:44,257 INFO L93 Difference]: Finished difference Result 5826 states and 25222 transitions. [2021-06-12 20:38:44,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:38:44,258 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 30 [2021-06-12 20:38:44,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:44,270 INFO L225 Difference]: With dead ends: 5826 [2021-06-12 20:38:44,270 INFO L226 Difference]: Without dead ends: 5587 [2021-06-12 20:38:44,270 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1001.5ms TimeCoverageRelationStatistics Valid=360, Invalid=1620, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:38:44,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5587 states. [2021-06-12 20:38:44,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5587 to 4393. [2021-06-12 20:38:44,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4393 states, 4392 states have (on average 4.466302367941712) internal successors, (19616), 4392 states have internal predecessors, (19616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:44,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4393 states to 4393 states and 19616 transitions. [2021-06-12 20:38:44,352 INFO L78 Accepts]: Start accepts. Automaton has 4393 states and 19616 transitions. Word has length 30 [2021-06-12 20:38:44,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:44,352 INFO L482 AbstractCegarLoop]: Abstraction has 4393 states and 19616 transitions. [2021-06-12 20:38:44,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-06-12 20:38:44,352 INFO L276 IsEmpty]: Start isEmpty. Operand 4393 states and 19616 transitions. [2021-06-12 20:38:44,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:44,359 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:44,359 INFO L472 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, 1] [2021-06-12 20:38:44,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:44,560 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:44,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:44,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1255333314, now seen corresponding path program 6 times [2021-06-12 20:38:44,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:44,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857427433] [2021-06-12 20:38:44,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:44,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:44,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857427433] [2021-06-12 20:38:44,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857427433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:44,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318454545] [2021-06-12 20:38:44,709 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 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 [2021-06-12 20:38:44,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:38:44,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:44,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:44,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:44,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:44,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:44,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:44,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:44,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-12 20:38:44,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:38:44,992 INFO L628 ElimStorePlain]: treesize reduction 27, result has 50.0 percent of original size [2021-06-12 20:38:44,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:44,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-12 20:38:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:45,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318454545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:45,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:45,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:38:45,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576287386] [2021-06-12 20:38:45,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:38:45,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:45,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:38:45,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:38:45,093 INFO L87 Difference]: Start difference. First operand 4393 states and 19616 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-06-12 20:38:47,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:47,041 INFO L93 Difference]: Finished difference Result 5773 states and 25069 transitions. [2021-06-12 20:38:47,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 20:38:47,041 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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 30 [2021-06-12 20:38:47,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:47,054 INFO L225 Difference]: With dead ends: 5773 [2021-06-12 20:38:47,054 INFO L226 Difference]: Without dead ends: 5628 [2021-06-12 20:38:47,054 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 1533.3ms TimeCoverageRelationStatistics Valid=578, Invalid=2962, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:38:47,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5628 states. [2021-06-12 20:38:47,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5628 to 4376. [2021-06-12 20:38:47,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4376 states, 4375 states have (on average 4.468571428571429) internal successors, (19550), 4375 states have internal predecessors, (19550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4376 states to 4376 states and 19550 transitions. [2021-06-12 20:38:47,135 INFO L78 Accepts]: Start accepts. Automaton has 4376 states and 19550 transitions. Word has length 30 [2021-06-12 20:38:47,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:47,135 INFO L482 AbstractCegarLoop]: Abstraction has 4376 states and 19550 transitions. [2021-06-12 20:38:47,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-06-12 20:38:47,135 INFO L276 IsEmpty]: Start isEmpty. Operand 4376 states and 19550 transitions. [2021-06-12 20:38:47,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:47,142 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:47,142 INFO L472 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, 1] [2021-06-12 20:38:47,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:47,343 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:47,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:47,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1510857112, now seen corresponding path program 7 times [2021-06-12 20:38:47,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:47,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39077569] [2021-06-12 20:38:47,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:47,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:47,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39077569] [2021-06-12 20:38:47,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39077569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:47,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057080645] [2021-06-12 20:38:47,466 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 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 [2021-06-12 20:38:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:47,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:47,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:47,642 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 [2021-06-12 20:38:47,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:47,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:47,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:47,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:38:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:47,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057080645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:47,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:47,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:38:47,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728605685] [2021-06-12 20:38:47,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:38:47,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:47,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:38:47,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:38:47,710 INFO L87 Difference]: Start difference. First operand 4376 states and 19550 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:38:48,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:48,928 INFO L93 Difference]: Finished difference Result 5468 states and 23984 transitions. [2021-06-12 20:38:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:38:48,928 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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 30 [2021-06-12 20:38:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:48,940 INFO L225 Difference]: With dead ends: 5468 [2021-06-12 20:38:48,940 INFO L226 Difference]: Without dead ends: 5395 [2021-06-12 20:38:48,940 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 881.9ms TimeCoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:38:48,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2021-06-12 20:38:49,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 4388. [2021-06-12 20:38:49,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4387 states have (on average 4.4679735582402555) internal successors, (19601), 4387 states have internal predecessors, (19601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 19601 transitions. [2021-06-12 20:38:49,021 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 19601 transitions. Word has length 30 [2021-06-12 20:38:49,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:49,021 INFO L482 AbstractCegarLoop]: Abstraction has 4388 states and 19601 transitions. [2021-06-12 20:38:49,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:38:49,021 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 19601 transitions. [2021-06-12 20:38:49,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:49,028 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:49,028 INFO L472 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, 1] [2021-06-12 20:38:49,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-12 20:38:49,229 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:49,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:49,229 INFO L82 PathProgramCache]: Analyzing trace with hash -973956236, now seen corresponding path program 8 times [2021-06-12 20:38:49,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:49,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770724317] [2021-06-12 20:38:49,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:49,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:49,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770724317] [2021-06-12 20:38:49,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770724317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:49,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115784866] [2021-06-12 20:38:49,351 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 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 [2021-06-12 20:38:49,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:49,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:49,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:38:49,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:49,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:49,545 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 [2021-06-12 20:38:49,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:49,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:49,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:49,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:38:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:49,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115784866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:49,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:49,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:38:49,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444553700] [2021-06-12 20:38:49,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:38:49,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:49,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:38:49,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:38:49,644 INFO L87 Difference]: Start difference. First operand 4388 states and 19601 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:38:50,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:50,810 INFO L93 Difference]: Finished difference Result 5415 states and 23774 transitions. [2021-06-12 20:38:50,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:38:50,810 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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 30 [2021-06-12 20:38:50,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:50,822 INFO L225 Difference]: With dead ends: 5415 [2021-06-12 20:38:50,822 INFO L226 Difference]: Without dead ends: 5343 [2021-06-12 20:38:50,822 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 904.4ms TimeCoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:38:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5343 states. [2021-06-12 20:38:50,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5343 to 4382. [2021-06-12 20:38:50,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 4.468614471581831) internal successors, (19577), 4381 states have internal predecessors, (19577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:50,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 19577 transitions. [2021-06-12 20:38:50,900 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 19577 transitions. Word has length 30 [2021-06-12 20:38:50,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:50,900 INFO L482 AbstractCegarLoop]: Abstraction has 4382 states and 19577 transitions. [2021-06-12 20:38:50,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:38:50,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 19577 transitions. [2021-06-12 20:38:50,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:50,907 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:50,907 INFO L472 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, 1] [2021-06-12 20:38:51,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-12 20:38:51,108 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:51,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:51,108 INFO L82 PathProgramCache]: Analyzing trace with hash 220115106, now seen corresponding path program 9 times [2021-06-12 20:38:51,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:51,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828784312] [2021-06-12 20:38:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:51,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:51,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828784312] [2021-06-12 20:38:51,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828784312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:51,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609273369] [2021-06-12 20:38:51,237 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 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 [2021-06-12 20:38:51,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:38:51,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:51,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:38:51,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:51,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:51,424 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 [2021-06-12 20:38:51,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:51,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:51,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:51,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:38:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:51,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609273369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:51,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:51,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:38:51,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522999204] [2021-06-12 20:38:51,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:51,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:51,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:51,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:51,559 INFO L87 Difference]: Start difference. First operand 4382 states and 19577 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-06-12 20:38:53,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:53,336 INFO L93 Difference]: Finished difference Result 5612 states and 24460 transitions. [2021-06-12 20:38:53,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:38:53,336 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 30 [2021-06-12 20:38:53,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:53,347 INFO L225 Difference]: With dead ends: 5612 [2021-06-12 20:38:53,347 INFO L226 Difference]: Without dead ends: 5470 [2021-06-12 20:38:53,348 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1292.8ms TimeCoverageRelationStatistics Valid=380, Invalid=1876, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:38:53,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5470 states. [2021-06-12 20:38:53,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5470 to 4379. [2021-06-12 20:38:53,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4379 states, 4378 states have (on average 4.468478757423481) internal successors, (19563), 4378 states have internal predecessors, (19563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:53,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4379 states to 4379 states and 19563 transitions. [2021-06-12 20:38:53,444 INFO L78 Accepts]: Start accepts. Automaton has 4379 states and 19563 transitions. Word has length 30 [2021-06-12 20:38:53,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:53,445 INFO L482 AbstractCegarLoop]: Abstraction has 4379 states and 19563 transitions. [2021-06-12 20:38:53,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-06-12 20:38:53,445 INFO L276 IsEmpty]: Start isEmpty. Operand 4379 states and 19563 transitions. [2021-06-12 20:38:53,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:53,452 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:53,452 INFO L472 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, 1] [2021-06-12 20:38:53,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-12 20:38:53,653 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:53,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:53,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1039746178, now seen corresponding path program 10 times [2021-06-12 20:38:53,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:53,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646199712] [2021-06-12 20:38:53,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:53,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:53,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646199712] [2021-06-12 20:38:53,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646199712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:53,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094224808] [2021-06-12 20:38:53,797 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 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 [2021-06-12 20:38:53,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:38:53,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:53,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:53,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:53,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-12 20:38:53,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:53,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:53,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:53,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:38:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:54,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094224808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:54,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:54,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:38:54,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464860196] [2021-06-12 20:38:54,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:38:54,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:54,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:38:54,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:38:54,008 INFO L87 Difference]: Start difference. First operand 4379 states and 19563 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:38:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:55,243 INFO L93 Difference]: Finished difference Result 5484 states and 24041 transitions. [2021-06-12 20:38:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:38:55,244 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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 30 [2021-06-12 20:38:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:55,256 INFO L225 Difference]: With dead ends: 5484 [2021-06-12 20:38:55,256 INFO L226 Difference]: Without dead ends: 5411 [2021-06-12 20:38:55,256 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 852.6ms TimeCoverageRelationStatistics Valid=228, Invalid=1178, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:38:55,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5411 states. [2021-06-12 20:38:55,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5411 to 4385. [2021-06-12 20:38:55,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4385 states, 4384 states have (on average 4.467837591240876) internal successors, (19587), 4384 states have internal predecessors, (19587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:55,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4385 states to 4385 states and 19587 transitions. [2021-06-12 20:38:55,367 INFO L78 Accepts]: Start accepts. Automaton has 4385 states and 19587 transitions. Word has length 30 [2021-06-12 20:38:55,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:55,367 INFO L482 AbstractCegarLoop]: Abstraction has 4385 states and 19587 transitions. [2021-06-12 20:38:55,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:38:55,368 INFO L276 IsEmpty]: Start isEmpty. Operand 4385 states and 19587 transitions. [2021-06-12 20:38:55,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:55,375 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:55,375 INFO L472 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, 1] [2021-06-12 20:38:55,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:55,576 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:55,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:55,576 INFO L82 PathProgramCache]: Analyzing trace with hash -419262112, now seen corresponding path program 11 times [2021-06-12 20:38:55,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:55,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645272440] [2021-06-12 20:38:55,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:55,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:55,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645272440] [2021-06-12 20:38:55,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645272440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:55,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61347137] [2021-06-12 20:38:55,724 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 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 [2021-06-12 20:38:55,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:38:55,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:55,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:55,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:55,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:55,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:55,893 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 23 treesize of output 49 [2021-06-12 20:38:55,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:55,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:55,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:55,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:49 [2021-06-12 20:38:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:56,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61347137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:56,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:56,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:38:56,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751302391] [2021-06-12 20:38:56,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:38:56,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:56,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:38:56,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:38:56,224 INFO L87 Difference]: Start difference. First operand 4385 states and 19587 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2021-06-12 20:38:58,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:58,234 INFO L93 Difference]: Finished difference Result 5324 states and 23333 transitions. [2021-06-12 20:38:58,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:38:58,234 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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 30 [2021-06-12 20:38:58,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:58,247 INFO L225 Difference]: With dead ends: 5324 [2021-06-12 20:38:58,247 INFO L226 Difference]: Without dead ends: 5272 [2021-06-12 20:38:58,247 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1495.8ms TimeCoverageRelationStatistics Valid=294, Invalid=2156, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:38:58,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5272 states. [2021-06-12 20:38:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5272 to 4382. [2021-06-12 20:38:58,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 4.468614471581831) internal successors, (19577), 4381 states have internal predecessors, (19577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:58,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 19577 transitions. [2021-06-12 20:38:58,334 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 19577 transitions. Word has length 30 [2021-06-12 20:38:58,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:58,334 INFO L482 AbstractCegarLoop]: Abstraction has 4382 states and 19577 transitions. [2021-06-12 20:38:58,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2021-06-12 20:38:58,334 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 19577 transitions. [2021-06-12 20:38:58,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:38:58,342 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:58,342 INFO L472 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, 1] [2021-06-12 20:38:58,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:58,543 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:58,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:58,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1328012258, now seen corresponding path program 12 times [2021-06-12 20:38:58,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:58,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239988498] [2021-06-12 20:38:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:58,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:58,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239988498] [2021-06-12 20:38:58,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239988498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:58,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081463156] [2021-06-12 20:38:58,687 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 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 [2021-06-12 20:38:58,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:38:58,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:58,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:38:58,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:58,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:58,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:58,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:58,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:58,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-12 20:38:58,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:58,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:58,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:58,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:50 [2021-06-12 20:38:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:59,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081463156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:59,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:59,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:38:59,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756226724] [2021-06-12 20:38:59,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:38:59,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:59,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:38:59,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:38:59,149 INFO L87 Difference]: Start difference. First operand 4382 states and 19577 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:39:01,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:01,340 INFO L93 Difference]: Finished difference Result 5665 states and 24579 transitions. [2021-06-12 20:39:01,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 20:39:01,340 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-06-12 20:39:01,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:01,353 INFO L225 Difference]: With dead ends: 5665 [2021-06-12 20:39:01,353 INFO L226 Difference]: Without dead ends: 5500 [2021-06-12 20:39:01,353 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 1787.6ms TimeCoverageRelationStatistics Valid=500, Invalid=3040, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:39:01,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5500 states. [2021-06-12 20:39:01,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5500 to 4379. [2021-06-12 20:39:01,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4379 states, 4378 states have (on average 4.468478757423481) internal successors, (19563), 4378 states have internal predecessors, (19563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:01,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4379 states to 4379 states and 19563 transitions. [2021-06-12 20:39:01,471 INFO L78 Accepts]: Start accepts. Automaton has 4379 states and 19563 transitions. Word has length 30 [2021-06-12 20:39:01,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:01,471 INFO L482 AbstractCegarLoop]: Abstraction has 4379 states and 19563 transitions. [2021-06-12 20:39:01,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:39:01,472 INFO L276 IsEmpty]: Start isEmpty. Operand 4379 states and 19563 transitions. [2021-06-12 20:39:01,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:01,479 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:01,479 INFO L472 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, 1] [2021-06-12 20:39:01,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-12 20:39:01,681 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:01,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:01,681 INFO L82 PathProgramCache]: Analyzing trace with hash 352000544, now seen corresponding path program 13 times [2021-06-12 20:39:01,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:01,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260549253] [2021-06-12 20:39:01,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:01,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:01,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260549253] [2021-06-12 20:39:01,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260549253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:01,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826057764] [2021-06-12 20:39:01,811 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 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 [2021-06-12 20:39:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:01,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:01,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:01,952 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 [2021-06-12 20:39:01,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:01,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:01,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:01,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:39:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:02,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826057764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:02,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:02,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:39:02,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944488829] [2021-06-12 20:39:02,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:39:02,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:02,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:39:02,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:39:02,027 INFO L87 Difference]: Start difference. First operand 4379 states and 19563 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:39:03,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:03,357 INFO L93 Difference]: Finished difference Result 5609 states and 24576 transitions. [2021-06-12 20:39:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:39:03,357 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-06-12 20:39:03,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:03,370 INFO L225 Difference]: With dead ends: 5609 [2021-06-12 20:39:03,370 INFO L226 Difference]: Without dead ends: 5538 [2021-06-12 20:39:03,370 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 924.1ms TimeCoverageRelationStatistics Valid=262, Invalid=1220, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:39:03,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5538 states. [2021-06-12 20:39:03,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5538 to 4380. [2021-06-12 20:39:03,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 4379 states have (on average 4.468828499657456) internal successors, (19569), 4379 states have internal predecessors, (19569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:03,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 19569 transitions. [2021-06-12 20:39:03,496 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 19569 transitions. Word has length 30 [2021-06-12 20:39:03,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:03,496 INFO L482 AbstractCegarLoop]: Abstraction has 4380 states and 19569 transitions. [2021-06-12 20:39:03,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:39:03,496 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 19569 transitions. [2021-06-12 20:39:03,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:03,504 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:03,504 INFO L472 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, 1] [2021-06-12 20:39:03,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:03,709 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:03,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:03,709 INFO L82 PathProgramCache]: Analyzing trace with hash -284466310, now seen corresponding path program 14 times [2021-06-12 20:39:03,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:03,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502798590] [2021-06-12 20:39:03,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:03,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:03,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:03,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502798590] [2021-06-12 20:39:03,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502798590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:03,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521757476] [2021-06-12 20:39:03,833 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 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 [2021-06-12 20:39:03,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:39:03,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:03,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:39:03,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:03,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:03,985 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 [2021-06-12 20:39:03,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:03,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:03,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:03,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:39:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:04,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521757476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:04,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:04,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:39:04,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551050881] [2021-06-12 20:39:04,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:04,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:04,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:04,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:04,119 INFO L87 Difference]: Start difference. First operand 4380 states and 19569 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-06-12 20:39:05,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:05,745 INFO L93 Difference]: Finished difference Result 5659 states and 24633 transitions. [2021-06-12 20:39:05,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:39:05,745 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 30 [2021-06-12 20:39:05,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:05,757 INFO L225 Difference]: With dead ends: 5659 [2021-06-12 20:39:05,758 INFO L226 Difference]: Without dead ends: 5531 [2021-06-12 20:39:05,758 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1147.6ms TimeCoverageRelationStatistics Valid=390, Invalid=1772, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:39:05,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5531 states. [2021-06-12 20:39:05,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5531 to 4373. [2021-06-12 20:39:05,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4373 states, 4372 states have (on average 4.469121683440073) internal successors, (19539), 4372 states have internal predecessors, (19539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:05,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4373 states to 4373 states and 19539 transitions. [2021-06-12 20:39:05,841 INFO L78 Accepts]: Start accepts. Automaton has 4373 states and 19539 transitions. Word has length 30 [2021-06-12 20:39:05,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:05,841 INFO L482 AbstractCegarLoop]: Abstraction has 4373 states and 19539 transitions. [2021-06-12 20:39:05,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-06-12 20:39:05,841 INFO L276 IsEmpty]: Start isEmpty. Operand 4373 states and 19539 transitions. [2021-06-12 20:39:05,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:05,849 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:05,849 INFO L472 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] [2021-06-12 20:39:06,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:06,050 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:06,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:06,050 INFO L82 PathProgramCache]: Analyzing trace with hash -954175358, now seen corresponding path program 5 times [2021-06-12 20:39:06,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:06,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058681152] [2021-06-12 20:39:06,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:06,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:06,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058681152] [2021-06-12 20:39:06,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058681152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:06,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602570394] [2021-06-12 20:39:06,258 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 [2021-06-12 20:39:06,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:39:06,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:06,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:06,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:06,489 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 [2021-06-12 20:39:06,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:06,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:06,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:06,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:39:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:06,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602570394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:06,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:06,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:39:06,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501621121] [2021-06-12 20:39:06,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:06,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:06,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:06,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:06,530 INFO L87 Difference]: Start difference. First operand 4373 states and 19539 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-06-12 20:39:07,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:07,829 INFO L93 Difference]: Finished difference Result 6100 states and 26636 transitions. [2021-06-12 20:39:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:39:07,829 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 30 [2021-06-12 20:39:07,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:07,843 INFO L225 Difference]: With dead ends: 6100 [2021-06-12 20:39:07,843 INFO L226 Difference]: Without dead ends: 6029 [2021-06-12 20:39:07,843 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 900.5ms TimeCoverageRelationStatistics Valid=312, Invalid=1758, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:39:07,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2021-06-12 20:39:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 4410. [2021-06-12 20:39:07,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4410 states, 4409 states have (on average 4.463823996371059) internal successors, (19681), 4409 states have internal predecessors, (19681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4410 states to 4410 states and 19681 transitions. [2021-06-12 20:39:07,932 INFO L78 Accepts]: Start accepts. Automaton has 4410 states and 19681 transitions. Word has length 30 [2021-06-12 20:39:07,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:07,932 INFO L482 AbstractCegarLoop]: Abstraction has 4410 states and 19681 transitions. [2021-06-12 20:39:07,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-06-12 20:39:07,933 INFO L276 IsEmpty]: Start isEmpty. Operand 4410 states and 19681 transitions. [2021-06-12 20:39:07,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:07,940 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:07,940 INFO L472 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, 1] [2021-06-12 20:39:08,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:08,141 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:08,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:08,141 INFO L82 PathProgramCache]: Analyzing trace with hash 350564036, now seen corresponding path program 15 times [2021-06-12 20:39:08,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:08,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614742044] [2021-06-12 20:39:08,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:08,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:08,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614742044] [2021-06-12 20:39:08,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614742044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:08,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639919884] [2021-06-12 20:39:08,291 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 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 [2021-06-12 20:39:08,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:39:08,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:08,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:39:08,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:08,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:08,495 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 [2021-06-12 20:39:08,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:08,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:08,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:08,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:39:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:08,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639919884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:08,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:08,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:39:08,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889878074] [2021-06-12 20:39:08,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:39:08,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:08,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:39:08,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:08,578 INFO L87 Difference]: Start difference. First operand 4410 states and 19681 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:39:10,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:10,149 INFO L93 Difference]: Finished difference Result 6047 states and 26146 transitions. [2021-06-12 20:39:10,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:39:10,149 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-06-12 20:39:10,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:10,162 INFO L225 Difference]: With dead ends: 6047 [2021-06-12 20:39:10,162 INFO L226 Difference]: Without dead ends: 5820 [2021-06-12 20:39:10,163 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1044.4ms TimeCoverageRelationStatistics Valid=393, Invalid=1769, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:39:10,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2021-06-12 20:39:10,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 4422. [2021-06-12 20:39:10,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4422 states, 4421 states have (on average 4.459850712508482) internal successors, (19717), 4421 states have internal predecessors, (19717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 19717 transitions. [2021-06-12 20:39:10,250 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 19717 transitions. Word has length 30 [2021-06-12 20:39:10,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:10,250 INFO L482 AbstractCegarLoop]: Abstraction has 4422 states and 19717 transitions. [2021-06-12 20:39:10,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:39:10,250 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 19717 transitions. [2021-06-12 20:39:10,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:10,258 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:10,258 INFO L472 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, 1] [2021-06-12 20:39:10,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-12 20:39:10,458 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:10,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:10,458 INFO L82 PathProgramCache]: Analyzing trace with hash -304490722, now seen corresponding path program 16 times [2021-06-12 20:39:10,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:10,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028203811] [2021-06-12 20:39:10,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:10,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:10,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028203811] [2021-06-12 20:39:10,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028203811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:10,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792678234] [2021-06-12 20:39:10,608 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 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 [2021-06-12 20:39:10,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:39:10,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:10,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:10,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:10,777 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 20 treesize of output 12 [2021-06-12 20:39:10,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:10,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:10,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:10,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-12 20:39:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:10,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792678234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:10,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:10,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:39:10,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838693998] [2021-06-12 20:39:10,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:10,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:10,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:10,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:10,834 INFO L87 Difference]: Start difference. First operand 4422 states and 19717 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:39:12,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:12,111 INFO L93 Difference]: Finished difference Result 5763 states and 25276 transitions. [2021-06-12 20:39:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:39:12,112 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 30 [2021-06-12 20:39:12,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:12,125 INFO L225 Difference]: With dead ends: 5763 [2021-06-12 20:39:12,125 INFO L226 Difference]: Without dead ends: 5692 [2021-06-12 20:39:12,125 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 796.0ms TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:39:12,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5692 states. [2021-06-12 20:39:12,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5692 to 4423. [2021-06-12 20:39:12,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 4422 states have (on average 4.460199004975125) internal successors, (19723), 4422 states have internal predecessors, (19723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:12,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 19723 transitions. [2021-06-12 20:39:12,212 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 19723 transitions. Word has length 30 [2021-06-12 20:39:12,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:12,212 INFO L482 AbstractCegarLoop]: Abstraction has 4423 states and 19723 transitions. [2021-06-12 20:39:12,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:39:12,212 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 19723 transitions. [2021-06-12 20:39:12,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:12,219 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:12,219 INFO L472 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, 1] [2021-06-12 20:39:12,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-12 20:39:12,420 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:12,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:12,420 INFO L82 PathProgramCache]: Analyzing trace with hash -810836988, now seen corresponding path program 17 times [2021-06-12 20:39:12,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:12,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347955473] [2021-06-12 20:39:12,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:12,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:12,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347955473] [2021-06-12 20:39:12,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347955473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:12,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618310882] [2021-06-12 20:39:12,603 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 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 [2021-06-12 20:39:12,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:39:12,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:12,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:12,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:12,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:12,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:12,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:12,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:12,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-06-12 20:39:12,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:39:12,871 INFO L628 ElimStorePlain]: treesize reduction 33, result has 48.4 percent of original size [2021-06-12 20:39:12,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:12,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:36 [2021-06-12 20:39:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:12,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618310882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:12,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:12,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:39:12,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580337156] [2021-06-12 20:39:12,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:12,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:12,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:12,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:12,976 INFO L87 Difference]: Start difference. First operand 4423 states and 19723 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:39:14,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:14,335 INFO L93 Difference]: Finished difference Result 5851 states and 25327 transitions. [2021-06-12 20:39:14,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:39:14,335 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:39:14,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:14,348 INFO L225 Difference]: With dead ends: 5851 [2021-06-12 20:39:14,348 INFO L226 Difference]: Without dead ends: 5652 [2021-06-12 20:39:14,348 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 883.4ms TimeCoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:39:14,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5652 states. [2021-06-12 20:39:14,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5652 to 4406. [2021-06-12 20:39:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4406 states, 4405 states have (on average 4.462429057888762) internal successors, (19657), 4405 states have internal predecessors, (19657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:14,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4406 states to 4406 states and 19657 transitions. [2021-06-12 20:39:14,435 INFO L78 Accepts]: Start accepts. Automaton has 4406 states and 19657 transitions. Word has length 30 [2021-06-12 20:39:14,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:14,435 INFO L482 AbstractCegarLoop]: Abstraction has 4406 states and 19657 transitions. [2021-06-12 20:39:14,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:39:14,435 INFO L276 IsEmpty]: Start isEmpty. Operand 4406 states and 19657 transitions. [2021-06-12 20:39:14,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:14,442 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:14,442 INFO L472 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] [2021-06-12 20:39:14,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-12 20:39:14,643 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:14,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1446402370, now seen corresponding path program 1 times [2021-06-12 20:39:14,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:14,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34290679] [2021-06-12 20:39:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:14,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:14,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:14,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34290679] [2021-06-12 20:39:14,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34290679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:14,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317660259] [2021-06-12 20:39:14,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-12 20:39:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:14,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:14,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:15,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:15,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:15,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:15,051 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 33 treesize of output 17 [2021-06-12 20:39:15,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:15,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:15,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:15,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-12 20:39:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:15,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317660259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:15,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:15,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:39:15,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641221225] [2021-06-12 20:39:15,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:39:15,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:15,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:39:15,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:39:15,084 INFO L87 Difference]: Start difference. First operand 4406 states and 19657 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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) [2021-06-12 20:39:15,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:15,429 INFO L93 Difference]: Finished difference Result 4991 states and 22000 transitions. [2021-06-12 20:39:15,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:39:15,430 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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 30 [2021-06-12 20:39:15,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:15,441 INFO L225 Difference]: With dead ends: 4991 [2021-06-12 20:39:15,441 INFO L226 Difference]: Without dead ends: 4920 [2021-06-12 20:39:15,441 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 338.3ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:15,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4920 states. [2021-06-12 20:39:15,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4920 to 4409. [2021-06-12 20:39:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 4.463248638838476) internal successors, (19674), 4408 states have internal predecessors, (19674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:15,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 19674 transitions. [2021-06-12 20:39:15,525 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 19674 transitions. Word has length 30 [2021-06-12 20:39:15,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:15,525 INFO L482 AbstractCegarLoop]: Abstraction has 4409 states and 19674 transitions. [2021-06-12 20:39:15,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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) [2021-06-12 20:39:15,525 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 19674 transitions. [2021-06-12 20:39:15,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:15,533 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:15,533 INFO L472 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, 1] [2021-06-12 20:39:15,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:15,733 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:15,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:15,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1163137630, now seen corresponding path program 18 times [2021-06-12 20:39:15,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:15,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002220689] [2021-06-12 20:39:15,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:16,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:16,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002220689] [2021-06-12 20:39:16,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002220689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:16,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233753441] [2021-06-12 20:39:16,011 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 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 [2021-06-12 20:39:16,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:39:16,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:16,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:39:16,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:16,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:16,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:16,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:16,351 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 29 treesize of output 17 [2021-06-12 20:39:16,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:16,365 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-12 20:39:16,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:16,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-12 20:39:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:16,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233753441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:16,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:16,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-12 20:39:16,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702449091] [2021-06-12 20:39:16,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:39:16,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:16,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:39:16,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:16,414 INFO L87 Difference]: Start difference. First operand 4409 states and 19674 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-06-12 20:39:17,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:17,474 INFO L93 Difference]: Finished difference Result 4803 states and 21171 transitions. [2021-06-12 20:39:17,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:39:17,474 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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 30 [2021-06-12 20:39:17,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:17,485 INFO L225 Difference]: With dead ends: 4803 [2021-06-12 20:39:17,485 INFO L226 Difference]: Without dead ends: 4748 [2021-06-12 20:39:17,485 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 736.4ms TimeCoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:39:17,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4748 states. [2021-06-12 20:39:17,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4748 to 4427. [2021-06-12 20:39:17,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4427 states, 4426 states have (on average 4.457975598734749) internal successors, (19731), 4426 states have internal predecessors, (19731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4427 states to 4427 states and 19731 transitions. [2021-06-12 20:39:17,613 INFO L78 Accepts]: Start accepts. Automaton has 4427 states and 19731 transitions. Word has length 30 [2021-06-12 20:39:17,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:17,613 INFO L482 AbstractCegarLoop]: Abstraction has 4427 states and 19731 transitions. [2021-06-12 20:39:17,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-06-12 20:39:17,613 INFO L276 IsEmpty]: Start isEmpty. Operand 4427 states and 19731 transitions. [2021-06-12 20:39:17,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:17,622 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:17,622 INFO L472 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, 1] [2021-06-12 20:39:17,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:17,823 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:17,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:17,823 INFO L82 PathProgramCache]: Analyzing trace with hash 229006916, now seen corresponding path program 19 times [2021-06-12 20:39:17,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:17,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895328736] [2021-06-12 20:39:17,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:18,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:18,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895328736] [2021-06-12 20:39:18,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895328736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:18,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075155829] [2021-06-12 20:39:18,053 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 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 [2021-06-12 20:39:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:18,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:18,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:18,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:18,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:18,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:18,344 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 33 treesize of output 17 [2021-06-12 20:39:18,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:18,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:18,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:18,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-12 20:39:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:18,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075155829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:18,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:18,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-12 20:39:18,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580349] [2021-06-12 20:39:18,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:18,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:18,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:18,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:18,428 INFO L87 Difference]: Start difference. First operand 4427 states and 19731 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:39:19,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:19,414 INFO L93 Difference]: Finished difference Result 5007 states and 22048 transitions. [2021-06-12 20:39:19,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:39:19,414 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:39:19,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:19,425 INFO L225 Difference]: With dead ends: 5007 [2021-06-12 20:39:19,426 INFO L226 Difference]: Without dead ends: 4936 [2021-06-12 20:39:19,426 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 759.1ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:39:19,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4936 states. [2021-06-12 20:39:19,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4936 to 4463. [2021-06-12 20:39:19,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 4462 states have (on average 4.449350067234424) internal successors, (19853), 4462 states have internal predecessors, (19853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:19,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 19853 transitions. [2021-06-12 20:39:19,508 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 19853 transitions. Word has length 30 [2021-06-12 20:39:19,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:19,508 INFO L482 AbstractCegarLoop]: Abstraction has 4463 states and 19853 transitions. [2021-06-12 20:39:19,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:39:19,508 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 19853 transitions. [2021-06-12 20:39:19,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:19,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:19,516 INFO L472 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, 1] [2021-06-12 20:39:19,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-12 20:39:19,717 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:19,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:19,717 INFO L82 PathProgramCache]: Analyzing trace with hash -277339350, now seen corresponding path program 20 times [2021-06-12 20:39:19,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:19,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976687094] [2021-06-12 20:39:19,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:19,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:19,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976687094] [2021-06-12 20:39:19,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976687094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:19,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332541913] [2021-06-12 20:39:19,915 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 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 [2021-06-12 20:39:19,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:39:19,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:19,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:39:19,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:20,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:20,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:20,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:20,306 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 29 treesize of output 17 [2021-06-12 20:39:20,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:20,322 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-06-12 20:39:20,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:20,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:14 [2021-06-12 20:39:20,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:20,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332541913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:20,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:20,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-12 20:39:20,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869463595] [2021-06-12 20:39:20,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:39:20,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:20,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:39:20,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:20,393 INFO L87 Difference]: Start difference. First operand 4463 states and 19853 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-06-12 20:39:21,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:21,426 INFO L93 Difference]: Finished difference Result 4797 states and 21140 transitions. [2021-06-12 20:39:21,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:39:21,426 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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 30 [2021-06-12 20:39:21,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:21,437 INFO L225 Difference]: With dead ends: 4797 [2021-06-12 20:39:21,437 INFO L226 Difference]: Without dead ends: 4742 [2021-06-12 20:39:21,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 762.5ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:39:21,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4742 states. [2021-06-12 20:39:21,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4742 to 4457. [2021-06-12 20:39:21,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4457 states, 4456 states have (on average 4.450628366247756) internal successors, (19832), 4456 states have internal predecessors, (19832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4457 states to 4457 states and 19832 transitions. [2021-06-12 20:39:21,527 INFO L78 Accepts]: Start accepts. Automaton has 4457 states and 19832 transitions. Word has length 30 [2021-06-12 20:39:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:21,527 INFO L482 AbstractCegarLoop]: Abstraction has 4457 states and 19832 transitions. [2021-06-12 20:39:21,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-06-12 20:39:21,527 INFO L276 IsEmpty]: Start isEmpty. Operand 4457 states and 19832 transitions. [2021-06-12 20:39:21,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:21,534 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:21,534 INFO L472 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] [2021-06-12 20:39:21,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:21,735 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:21,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:21,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1582606780, now seen corresponding path program 2 times [2021-06-12 20:39:21,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:21,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32739176] [2021-06-12 20:39:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:21,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:21,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32739176] [2021-06-12 20:39:21,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32739176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:21,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268986316] [2021-06-12 20:39:21,898 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 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 [2021-06-12 20:39:21,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:39:21,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:21,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:21,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:22,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:22,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:22,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:22,133 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 30 treesize of output 16 [2021-06-12 20:39:22,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:22,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:22,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:22,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:39:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:22,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268986316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:22,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:22,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-12 20:39:22,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285717760] [2021-06-12 20:39:22,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:39:22,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:22,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:39:22,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:39:22,171 INFO L87 Difference]: Start difference. First operand 4457 states and 19832 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-06-12 20:39:22,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:22,997 INFO L93 Difference]: Finished difference Result 5177 states and 22688 transitions. [2021-06-12 20:39:22,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:39:22,998 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 30 [2021-06-12 20:39:22,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:23,009 INFO L225 Difference]: With dead ends: 5177 [2021-06-12 20:39:23,009 INFO L226 Difference]: Without dead ends: 5104 [2021-06-12 20:39:23,009 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 407.2ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:23,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5104 states. [2021-06-12 20:39:23,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5104 to 4502. [2021-06-12 20:39:23,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4502 states, 4501 states have (on average 4.452121750722061) internal successors, (20039), 4501 states have internal predecessors, (20039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 20039 transitions. [2021-06-12 20:39:23,087 INFO L78 Accepts]: Start accepts. Automaton has 4502 states and 20039 transitions. Word has length 30 [2021-06-12 20:39:23,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:23,087 INFO L482 AbstractCegarLoop]: Abstraction has 4502 states and 20039 transitions. [2021-06-12 20:39:23,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-06-12 20:39:23,087 INFO L276 IsEmpty]: Start isEmpty. Operand 4502 states and 20039 transitions. [2021-06-12 20:39:23,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:23,094 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:23,094 INFO L472 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] [2021-06-12 20:39:23,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-12 20:39:23,294 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:23,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:23,295 INFO L82 PathProgramCache]: Analyzing trace with hash -902206568, now seen corresponding path program 3 times [2021-06-12 20:39:23,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:23,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597196263] [2021-06-12 20:39:23,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:23,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:23,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597196263] [2021-06-12 20:39:23,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597196263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:23,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925379592] [2021-06-12 20:39:23,425 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 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 [2021-06-12 20:39:23,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:39:23,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:23,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:39:23,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:23,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:23,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:23,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:23,640 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 30 treesize of output 34 [2021-06-12 20:39:23,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:23,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:23,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:23,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:92 [2021-06-12 20:39:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:23,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925379592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:23,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:23,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:39:23,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132369519] [2021-06-12 20:39:23,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:39:23,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:23,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:39:23,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:39:23,821 INFO L87 Difference]: Start difference. First operand 4502 states and 20039 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:39:25,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:25,649 INFO L93 Difference]: Finished difference Result 5488 states and 23896 transitions. [2021-06-12 20:39:25,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:39:25,649 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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 30 [2021-06-12 20:39:25,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:25,661 INFO L225 Difference]: With dead ends: 5488 [2021-06-12 20:39:25,661 INFO L226 Difference]: Without dead ends: 5338 [2021-06-12 20:39:25,661 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1159.4ms TimeCoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:39:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5338 states. [2021-06-12 20:39:25,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5338 to 4491. [2021-06-12 20:39:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4491 states, 4490 states have (on average 4.4523385300668155) internal successors, (19991), 4490 states have internal predecessors, (19991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4491 states to 4491 states and 19991 transitions. [2021-06-12 20:39:25,747 INFO L78 Accepts]: Start accepts. Automaton has 4491 states and 19991 transitions. Word has length 30 [2021-06-12 20:39:25,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:25,747 INFO L482 AbstractCegarLoop]: Abstraction has 4491 states and 19991 transitions. [2021-06-12 20:39:25,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:39:25,747 INFO L276 IsEmpty]: Start isEmpty. Operand 4491 states and 19991 transitions. [2021-06-12 20:39:25,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:25,754 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:25,754 INFO L472 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, 1] [2021-06-12 20:39:25,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:25,955 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:25,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:25,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1423372772, now seen corresponding path program 21 times [2021-06-12 20:39:25,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:25,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745294934] [2021-06-12 20:39:25,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:26,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:26,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:26,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745294934] [2021-06-12 20:39:26,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745294934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:26,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701336102] [2021-06-12 20:39:26,126 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 [2021-06-12 20:39:26,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:39:26,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:26,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:26,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:26,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:26,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:26,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:26,332 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 30 treesize of output 16 [2021-06-12 20:39:26,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:26,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:26,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:26,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:39:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:26,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701336102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:26,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:26,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:39:26,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586058853] [2021-06-12 20:39:26,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:39:26,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:26,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:39:26,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:39:26,388 INFO L87 Difference]: Start difference. First operand 4491 states and 19991 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:27,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:27,247 INFO L93 Difference]: Finished difference Result 4980 states and 21922 transitions. [2021-06-12 20:39:27,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:39:27,247 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 20:39:27,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:27,258 INFO L225 Difference]: With dead ends: 4980 [2021-06-12 20:39:27,259 INFO L226 Difference]: Without dead ends: 4907 [2021-06-12 20:39:27,259 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 508.4ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:39:27,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4907 states. [2021-06-12 20:39:27,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4907 to 4503. [2021-06-12 20:39:27,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4503 states, 4502 states have (on average 4.451577076854731) internal successors, (20041), 4502 states have internal predecessors, (20041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:27,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4503 states to 4503 states and 20041 transitions. [2021-06-12 20:39:27,346 INFO L78 Accepts]: Start accepts. Automaton has 4503 states and 20041 transitions. Word has length 30 [2021-06-12 20:39:27,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:27,346 INFO L482 AbstractCegarLoop]: Abstraction has 4503 states and 20041 transitions. [2021-06-12 20:39:27,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:27,346 INFO L276 IsEmpty]: Start isEmpty. Operand 4503 states and 20041 transitions. [2021-06-12 20:39:27,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:27,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:27,354 INFO L472 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, 1] [2021-06-12 20:39:27,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:27,554 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:27,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:27,554 INFO L82 PathProgramCache]: Analyzing trace with hash -802888706, now seen corresponding path program 22 times [2021-06-12 20:39:27,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:27,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297609402] [2021-06-12 20:39:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:27,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:27,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297609402] [2021-06-12 20:39:27,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297609402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:27,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091513049] [2021-06-12 20:39:27,765 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 [2021-06-12 20:39:27,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:39:27,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:27,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:27,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:27,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:27,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:27,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:27,983 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 30 treesize of output 16 [2021-06-12 20:39:27,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:27,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:27,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:27,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:39:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:28,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091513049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:28,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:28,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-12 20:39:28,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213484911] [2021-06-12 20:39:28,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:39:28,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:28,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:39:28,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:39:28,022 INFO L87 Difference]: Start difference. First operand 4503 states and 20041 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2021-06-12 20:39:28,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:28,782 INFO L93 Difference]: Finished difference Result 5023 states and 22112 transitions. [2021-06-12 20:39:28,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:39:28,783 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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 30 [2021-06-12 20:39:28,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:28,794 INFO L225 Difference]: With dead ends: 5023 [2021-06-12 20:39:28,794 INFO L226 Difference]: Without dead ends: 4957 [2021-06-12 20:39:28,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 524.0ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:39:28,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4957 states. [2021-06-12 20:39:28,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4957 to 4497. [2021-06-12 20:39:28,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4497 states, 4496 states have (on average 4.452179715302491) internal successors, (20017), 4496 states have internal predecessors, (20017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:28,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4497 states to 4497 states and 20017 transitions. [2021-06-12 20:39:28,882 INFO L78 Accepts]: Start accepts. Automaton has 4497 states and 20017 transitions. Word has length 30 [2021-06-12 20:39:28,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:28,882 INFO L482 AbstractCegarLoop]: Abstraction has 4497 states and 20017 transitions. [2021-06-12 20:39:28,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2021-06-12 20:39:28,882 INFO L276 IsEmpty]: Start isEmpty. Operand 4497 states and 20017 transitions. [2021-06-12 20:39:28,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:28,890 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:28,890 INFO L472 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, 1] [2021-06-12 20:39:29,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-12 20:39:29,091 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:29,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:29,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1558152092, now seen corresponding path program 23 times [2021-06-12 20:39:29,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:29,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464535473] [2021-06-12 20:39:29,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:29,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:29,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464535473] [2021-06-12 20:39:29,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464535473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:29,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322115983] [2021-06-12 20:39:29,306 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 [2021-06-12 20:39:29,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:39:29,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:29,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:29,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:29,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:29,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:29,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:29,591 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 33 treesize of output 17 [2021-06-12 20:39:29,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:29,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:29,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:29,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-12 20:39:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:29,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322115983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:29,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:29,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:39:29,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607163089] [2021-06-12 20:39:29,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:39:29,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:29,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:39:29,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:39:29,641 INFO L87 Difference]: Start difference. First operand 4497 states and 20017 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:39:30,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:30,742 INFO L93 Difference]: Finished difference Result 5389 states and 23553 transitions. [2021-06-12 20:39:30,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:39:30,743 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-06-12 20:39:30,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:30,754 INFO L225 Difference]: With dead ends: 5389 [2021-06-12 20:39:30,754 INFO L226 Difference]: Without dead ends: 5325 [2021-06-12 20:39:30,755 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 800.5ms TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:39:30,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5325 states. [2021-06-12 20:39:30,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5325 to 4496. [2021-06-12 20:39:30,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4496 states, 4495 states have (on average 4.452725250278087) internal successors, (20015), 4495 states have internal predecessors, (20015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4496 states to 4496 states and 20015 transitions. [2021-06-12 20:39:30,839 INFO L78 Accepts]: Start accepts. Automaton has 4496 states and 20015 transitions. Word has length 30 [2021-06-12 20:39:30,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:30,839 INFO L482 AbstractCegarLoop]: Abstraction has 4496 states and 20015 transitions. [2021-06-12 20:39:30,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:39:30,839 INFO L276 IsEmpty]: Start isEmpty. Operand 4496 states and 20015 transitions. [2021-06-12 20:39:30,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:30,847 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:30,847 INFO L472 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, 1] [2021-06-12 20:39:31,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-12 20:39:31,047 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:31,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:31,048 INFO L82 PathProgramCache]: Analyzing trace with hash 609639870, now seen corresponding path program 24 times [2021-06-12 20:39:31,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:31,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676660471] [2021-06-12 20:39:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:31,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:31,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676660471] [2021-06-12 20:39:31,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676660471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:31,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369652678] [2021-06-12 20:39:31,261 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 [2021-06-12 20:39:31,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:39:31,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:31,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:31,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:31,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:31,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:31,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:31,449 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 30 treesize of output 16 [2021-06-12 20:39:31,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:31,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:31,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:31,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:39:31,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:31,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369652678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:31,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:31,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-12 20:39:31,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903262708] [2021-06-12 20:39:31,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:39:31,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:31,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:39:31,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:39:31,529 INFO L87 Difference]: Start difference. First operand 4496 states and 20015 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:32,633 INFO L93 Difference]: Finished difference Result 4928 states and 21719 transitions. [2021-06-12 20:39:32,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:39:32,634 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 20:39:32,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:32,645 INFO L225 Difference]: With dead ends: 4928 [2021-06-12 20:39:32,645 INFO L226 Difference]: Without dead ends: 4855 [2021-06-12 20:39:32,645 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 779.5ms TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:39:32,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4855 states. [2021-06-12 20:39:32,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4855 to 4508. [2021-06-12 20:39:32,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4508 states, 4507 states have (on average 4.452185489238961) internal successors, (20066), 4507 states have internal predecessors, (20066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:32,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4508 states to 4508 states and 20066 transitions. [2021-06-12 20:39:32,727 INFO L78 Accepts]: Start accepts. Automaton has 4508 states and 20066 transitions. Word has length 30 [2021-06-12 20:39:32,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:32,727 INFO L482 AbstractCegarLoop]: Abstraction has 4508 states and 20066 transitions. [2021-06-12 20:39:32,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:32,727 INFO L276 IsEmpty]: Start isEmpty. Operand 4508 states and 20066 transitions. [2021-06-12 20:39:32,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:32,735 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:32,735 INFO L472 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, 1] [2021-06-12 20:39:32,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-12 20:39:32,935 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:32,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:32,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1875173478, now seen corresponding path program 25 times [2021-06-12 20:39:32,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:32,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110824526] [2021-06-12 20:39:32,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:33,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:33,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110824526] [2021-06-12 20:39:33,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110824526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:33,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818619179] [2021-06-12 20:39:33,130 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 [2021-06-12 20:39:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:33,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:33,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:33,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:33,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:33,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:33,318 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 30 treesize of output 16 [2021-06-12 20:39:33,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:33,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:33,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:33,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:39:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:33,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818619179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:33,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:33,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-12 20:39:33,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129106312] [2021-06-12 20:39:33,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:39:33,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:33,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:39:33,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:39:33,398 INFO L87 Difference]: Start difference. First operand 4508 states and 20066 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:39:34,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:34,398 INFO L93 Difference]: Finished difference Result 5020 states and 22117 transitions. [2021-06-12 20:39:34,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:39:34,398 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 30 [2021-06-12 20:39:34,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:34,410 INFO L225 Difference]: With dead ends: 5020 [2021-06-12 20:39:34,410 INFO L226 Difference]: Without dead ends: 4945 [2021-06-12 20:39:34,410 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 681.8ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:39:34,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4945 states. [2021-06-12 20:39:34,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4945 to 4499. [2021-06-12 20:39:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4499 states, 4498 states have (on average 4.452645620275678) internal successors, (20028), 4498 states have internal predecessors, (20028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4499 states to 4499 states and 20028 transitions. [2021-06-12 20:39:34,494 INFO L78 Accepts]: Start accepts. Automaton has 4499 states and 20028 transitions. Word has length 30 [2021-06-12 20:39:34,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:34,494 INFO L482 AbstractCegarLoop]: Abstraction has 4499 states and 20028 transitions. [2021-06-12 20:39:34,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:39:34,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4499 states and 20028 transitions. [2021-06-12 20:39:34,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:34,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:34,502 INFO L472 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, 1] [2021-06-12 20:39:34,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:34,703 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:34,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:34,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1940963420, now seen corresponding path program 26 times [2021-06-12 20:39:34,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:34,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664517822] [2021-06-12 20:39:34,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:34,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:34,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664517822] [2021-06-12 20:39:34,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664517822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:34,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084457590] [2021-06-12 20:39:34,961 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 [2021-06-12 20:39:35,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:39:35,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:35,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:35,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:35,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:35,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:35,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:35,265 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 30 treesize of output 16 [2021-06-12 20:39:35,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:35,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:35,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:35,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:39:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:35,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084457590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:35,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:35,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-12 20:39:35,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163434188] [2021-06-12 20:39:35,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:39:35,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:35,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:39:35,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:39:35,367 INFO L87 Difference]: Start difference. First operand 4499 states and 20028 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:36,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:36,242 INFO L93 Difference]: Finished difference Result 4919 states and 21677 transitions. [2021-06-12 20:39:36,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:39:36,242 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 20:39:36,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:36,253 INFO L225 Difference]: With dead ends: 4919 [2021-06-12 20:39:36,253 INFO L226 Difference]: Without dead ends: 4846 [2021-06-12 20:39:36,254 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 757.4ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:39:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4846 states. [2021-06-12 20:39:36,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4846 to 4505. [2021-06-12 20:39:36,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 4504 states have (on average 4.452042628774422) internal successors, (20052), 4504 states have internal predecessors, (20052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:36,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 20052 transitions. [2021-06-12 20:39:36,337 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 20052 transitions. Word has length 30 [2021-06-12 20:39:36,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:36,337 INFO L482 AbstractCegarLoop]: Abstraction has 4505 states and 20052 transitions. [2021-06-12 20:39:36,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:36,337 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 20052 transitions. [2021-06-12 20:39:36,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:36,344 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:36,344 INFO L472 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, 1] [2021-06-12 20:39:36,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-12 20:39:36,546 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:36,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:36,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1320479354, now seen corresponding path program 27 times [2021-06-12 20:39:36,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:36,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722712956] [2021-06-12 20:39:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:36,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:36,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722712956] [2021-06-12 20:39:36,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722712956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:36,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059841649] [2021-06-12 20:39:36,740 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 [2021-06-12 20:39:36,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:39:36,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:36,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:36,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:36,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:36,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:36,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:36,948 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 30 treesize of output 16 [2021-06-12 20:39:36,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:36,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:36,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:36,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:39:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:37,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059841649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:37,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:37,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-12 20:39:37,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910986221] [2021-06-12 20:39:37,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:39:37,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:37,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:39:37,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:39:37,010 INFO L87 Difference]: Start difference. First operand 4505 states and 20052 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2021-06-12 20:39:37,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:37,696 INFO L93 Difference]: Finished difference Result 5027 states and 22131 transitions. [2021-06-12 20:39:37,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:39:37,696 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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 30 [2021-06-12 20:39:37,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:37,707 INFO L225 Difference]: With dead ends: 5027 [2021-06-12 20:39:37,708 INFO L226 Difference]: Without dead ends: 4961 [2021-06-12 20:39:37,708 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 512.4ms TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:39:37,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-06-12 20:39:37,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 4499. [2021-06-12 20:39:37,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4499 states, 4498 states have (on average 4.452645620275678) internal successors, (20028), 4498 states have internal predecessors, (20028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:37,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4499 states to 4499 states and 20028 transitions. [2021-06-12 20:39:37,792 INFO L78 Accepts]: Start accepts. Automaton has 4499 states and 20028 transitions. Word has length 30 [2021-06-12 20:39:37,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:37,792 INFO L482 AbstractCegarLoop]: Abstraction has 4499 states and 20028 transitions. [2021-06-12 20:39:37,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2021-06-12 20:39:37,792 INFO L276 IsEmpty]: Start isEmpty. Operand 4499 states and 20028 transitions. [2021-06-12 20:39:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:37,800 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:37,800 INFO L472 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, 1] [2021-06-12 20:39:38,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-12 20:39:38,001 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:38,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:38,001 INFO L82 PathProgramCache]: Analyzing trace with hash -549216698, now seen corresponding path program 28 times [2021-06-12 20:39:38,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:38,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907726906] [2021-06-12 20:39:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:38,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:38,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907726906] [2021-06-12 20:39:38,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907726906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:38,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152729770] [2021-06-12 20:39:38,200 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 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 [2021-06-12 20:39:38,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:39:38,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:38,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:38,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:38,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:38,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:38,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:38,382 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 30 treesize of output 16 [2021-06-12 20:39:38,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:38,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:38,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:38,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:39:38,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:38,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152729770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:38,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:38,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:39:38,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952632562] [2021-06-12 20:39:38,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:39:38,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:38,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:39:38,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:39:38,485 INFO L87 Difference]: Start difference. First operand 4499 states and 20028 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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) [2021-06-12 20:39:39,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:39,483 INFO L93 Difference]: Finished difference Result 5034 states and 22167 transitions. [2021-06-12 20:39:39,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:39:39,483 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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 30 [2021-06-12 20:39:39,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:39,495 INFO L225 Difference]: With dead ends: 5034 [2021-06-12 20:39:39,495 INFO L226 Difference]: Without dead ends: 4963 [2021-06-12 20:39:39,495 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 764.0ms TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:39:39,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4963 states. [2021-06-12 20:39:39,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4963 to 4499. [2021-06-12 20:39:39,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4499 states, 4498 states have (on average 4.452645620275678) internal successors, (20028), 4498 states have internal predecessors, (20028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:39,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4499 states to 4499 states and 20028 transitions. [2021-06-12 20:39:39,580 INFO L78 Accepts]: Start accepts. Automaton has 4499 states and 20028 transitions. Word has length 30 [2021-06-12 20:39:39,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:39,580 INFO L482 AbstractCegarLoop]: Abstraction has 4499 states and 20028 transitions. [2021-06-12 20:39:39,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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) [2021-06-12 20:39:39,581 INFO L276 IsEmpty]: Start isEmpty. Operand 4499 states and 20028 transitions. [2021-06-12 20:39:39,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:39,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:39,588 INFO L472 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, 1] [2021-06-12 20:39:39,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:39,789 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:39,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:39,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1185683552, now seen corresponding path program 29 times [2021-06-12 20:39:39,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:39,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490845131] [2021-06-12 20:39:39,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:40,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:40,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490845131] [2021-06-12 20:39:40,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490845131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:40,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289404781] [2021-06-12 20:39:40,020 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 [2021-06-12 20:39:40,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:39:40,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:40,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:40,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:40,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:40,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:40,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:40,245 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 30 treesize of output 16 [2021-06-12 20:39:40,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:40,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:40,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:40,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:39:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:40,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289404781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:40,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:40,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:39:40,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128146403] [2021-06-12 20:39:40,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:39:40,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:40,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:39:40,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:39:40,378 INFO L87 Difference]: Start difference. First operand 4499 states and 20028 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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) [2021-06-12 20:39:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:41,323 INFO L93 Difference]: Finished difference Result 5031 states and 22146 transitions. [2021-06-12 20:39:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:39:41,324 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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 30 [2021-06-12 20:39:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:41,339 INFO L225 Difference]: With dead ends: 5031 [2021-06-12 20:39:41,339 INFO L226 Difference]: Without dead ends: 4967 [2021-06-12 20:39:41,339 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 742.4ms TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:39:41,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4967 states. [2021-06-12 20:39:41,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4967 to 4496. [2021-06-12 20:39:41,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4496 states, 4495 states have (on average 4.452725250278087) internal successors, (20015), 4495 states have internal predecessors, (20015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:41,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4496 states to 4496 states and 20015 transitions. [2021-06-12 20:39:41,433 INFO L78 Accepts]: Start accepts. Automaton has 4496 states and 20015 transitions. Word has length 30 [2021-06-12 20:39:41,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:41,433 INFO L482 AbstractCegarLoop]: Abstraction has 4496 states and 20015 transitions. [2021-06-12 20:39:41,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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) [2021-06-12 20:39:41,433 INFO L276 IsEmpty]: Start isEmpty. Operand 4496 states and 20015 transitions. [2021-06-12 20:39:41,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:41,441 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:41,441 INFO L472 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] [2021-06-12 20:39:41,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable438 [2021-06-12 20:39:41,643 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:41,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:41,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2049698712, now seen corresponding path program 4 times [2021-06-12 20:39:41,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:41,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120573025] [2021-06-12 20:39:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:41,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:41,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:41,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120573025] [2021-06-12 20:39:41,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120573025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:41,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196909474] [2021-06-12 20:39:41,764 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 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 [2021-06-12 20:39:41,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:39:41,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:41,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:41,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:42,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:42,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:42,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:42,051 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 33 treesize of output 17 [2021-06-12 20:39:42,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:42,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:42,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:42,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-12 20:39:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:42,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196909474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:42,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:42,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-12 20:39:42,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500670540] [2021-06-12 20:39:42,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:39:42,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:42,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:39:42,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:39:42,090 INFO L87 Difference]: Start difference. First operand 4496 states and 20015 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 20:39:42,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:42,823 INFO L93 Difference]: Finished difference Result 5151 states and 22618 transitions. [2021-06-12 20:39:42,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:39:42,823 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 30 [2021-06-12 20:39:42,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:42,834 INFO L225 Difference]: With dead ends: 5151 [2021-06-12 20:39:42,834 INFO L226 Difference]: Without dead ends: 5080 [2021-06-12 20:39:42,835 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 444.9ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:42,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5080 states. [2021-06-12 20:39:42,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5080 to 4506. [2021-06-12 20:39:42,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 4505 states have (on average 4.45527192008879) internal successors, (20071), 4505 states have internal predecessors, (20071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:42,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 20071 transitions. [2021-06-12 20:39:42,920 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 20071 transitions. Word has length 30 [2021-06-12 20:39:42,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:42,920 INFO L482 AbstractCegarLoop]: Abstraction has 4506 states and 20071 transitions. [2021-06-12 20:39:42,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 20:39:42,920 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 20071 transitions. [2021-06-12 20:39:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:42,928 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:42,928 INFO L472 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, 1] [2021-06-12 20:39:43,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:43,128 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:43,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1184043260, now seen corresponding path program 30 times [2021-06-12 20:39:43,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:43,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214366079] [2021-06-12 20:39:43,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:43,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:43,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214366079] [2021-06-12 20:39:43,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214366079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:43,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168609366] [2021-06-12 20:39:43,323 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 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 [2021-06-12 20:39:43,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:39:43,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:43,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:43,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:43,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:43,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:43,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:43,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:43,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-06-12 20:39:43,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 20:39:43,674 INFO L628 ElimStorePlain]: treesize reduction 14, result has 72.0 percent of original size [2021-06-12 20:39:43,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:43,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:50 [2021-06-12 20:39:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:43,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168609366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:43,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:43,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:39:43,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916183854] [2021-06-12 20:39:43,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:39:43,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:43,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:39:43,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:43,786 INFO L87 Difference]: Start difference. First operand 4506 states and 20071 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-06-12 20:39:46,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:46,018 INFO L93 Difference]: Finished difference Result 5292 states and 23016 transitions. [2021-06-12 20:39:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:39:46,019 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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 30 [2021-06-12 20:39:46,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:46,030 INFO L225 Difference]: With dead ends: 5292 [2021-06-12 20:39:46,031 INFO L226 Difference]: Without dead ends: 5160 [2021-06-12 20:39:46,031 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1799.3ms TimeCoverageRelationStatistics Valid=355, Invalid=2401, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:39:46,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5160 states. [2021-06-12 20:39:46,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5160 to 4506. [2021-06-12 20:39:46,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 4505 states have (on average 4.45527192008879) internal successors, (20071), 4505 states have internal predecessors, (20071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:46,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 20071 transitions. [2021-06-12 20:39:46,111 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 20071 transitions. Word has length 30 [2021-06-12 20:39:46,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:46,111 INFO L482 AbstractCegarLoop]: Abstraction has 4506 states and 20071 transitions. [2021-06-12 20:39:46,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-06-12 20:39:46,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 20071 transitions. [2021-06-12 20:39:46,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:46,119 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:46,119 INFO L472 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, 1] [2021-06-12 20:39:46,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:46,320 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:46,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:46,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1181268604, now seen corresponding path program 31 times [2021-06-12 20:39:46,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:46,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871808176] [2021-06-12 20:39:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:46,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:46,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871808176] [2021-06-12 20:39:46,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871808176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:46,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223519585] [2021-06-12 20:39:46,508 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 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 [2021-06-12 20:39:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:46,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:46,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:46,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:46,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:46,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:46,722 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 33 treesize of output 17 [2021-06-12 20:39:46,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:46,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:46,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:46,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-12 20:39:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:46,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223519585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:46,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:46,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:39:46,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382423788] [2021-06-12 20:39:46,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:39:46,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:46,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:39:46,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:39:46,790 INFO L87 Difference]: Start difference. First operand 4506 states and 20071 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:39:48,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:48,157 INFO L93 Difference]: Finished difference Result 5489 states and 24001 transitions. [2021-06-12 20:39:48,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:39:48,158 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-06-12 20:39:48,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:48,170 INFO L225 Difference]: With dead ends: 5489 [2021-06-12 20:39:48,170 INFO L226 Difference]: Without dead ends: 5394 [2021-06-12 20:39:48,170 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 845.8ms TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:39:48,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5394 states. [2021-06-12 20:39:48,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5394 to 4516. [2021-06-12 20:39:48,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4516 states, 4515 states have (on average 4.453599114064231) internal successors, (20108), 4515 states have internal predecessors, (20108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:48,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4516 states to 4516 states and 20108 transitions. [2021-06-12 20:39:48,255 INFO L78 Accepts]: Start accepts. Automaton has 4516 states and 20108 transitions. Word has length 30 [2021-06-12 20:39:48,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:48,255 INFO L482 AbstractCegarLoop]: Abstraction has 4516 states and 20108 transitions. [2021-06-12 20:39:48,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:39:48,256 INFO L276 IsEmpty]: Start isEmpty. Operand 4516 states and 20108 transitions. [2021-06-12 20:39:48,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:48,263 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:48,263 INFO L472 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, 1] [2021-06-12 20:39:48,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:48,464 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:48,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:48,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1687614870, now seen corresponding path program 32 times [2021-06-12 20:39:48,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:48,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121641089] [2021-06-12 20:39:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:48,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:48,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121641089] [2021-06-12 20:39:48,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121641089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:48,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881411737] [2021-06-12 20:39:48,659 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 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 [2021-06-12 20:39:48,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:39:48,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:48,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:48,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:48,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:48,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:48,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:48,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:48,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-06-12 20:39:48,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 20:39:48,954 INFO L628 ElimStorePlain]: treesize reduction 14, result has 73.6 percent of original size [2021-06-12 20:39:48,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:48,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:53 [2021-06-12 20:39:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:49,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881411737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:49,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:49,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 20:39:49,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740083746] [2021-06-12 20:39:49,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:39:49,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:49,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:39:49,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:49,100 INFO L87 Difference]: Start difference. First operand 4516 states and 20108 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-06-12 20:39:51,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:51,322 INFO L93 Difference]: Finished difference Result 5212 states and 22716 transitions. [2021-06-12 20:39:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:39:51,322 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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 30 [2021-06-12 20:39:51,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:51,334 INFO L225 Difference]: With dead ends: 5212 [2021-06-12 20:39:51,334 INFO L226 Difference]: Without dead ends: 5080 [2021-06-12 20:39:51,334 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1660.7ms TimeCoverageRelationStatistics Valid=333, Invalid=2117, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:39:51,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5080 states. [2021-06-12 20:39:51,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5080 to 4507. [2021-06-12 20:39:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4507 states, 4506 states have (on average 4.455392809587217) internal successors, (20076), 4506 states have internal predecessors, (20076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:51,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4507 states to 4507 states and 20076 transitions. [2021-06-12 20:39:51,419 INFO L78 Accepts]: Start accepts. Automaton has 4507 states and 20076 transitions. Word has length 30 [2021-06-12 20:39:51,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:51,419 INFO L482 AbstractCegarLoop]: Abstraction has 4507 states and 20076 transitions. [2021-06-12 20:39:51,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-06-12 20:39:51,419 INFO L276 IsEmpty]: Start isEmpty. Operand 4507 states and 20076 transitions. [2021-06-12 20:39:51,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:51,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:51,427 INFO L472 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, 1] [2021-06-12 20:39:51,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-12 20:39:51,628 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:51,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:51,628 INFO L82 PathProgramCache]: Analyzing trace with hash -30948974, now seen corresponding path program 33 times [2021-06-12 20:39:51,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:51,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431326760] [2021-06-12 20:39:51,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:51,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:51,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431326760] [2021-06-12 20:39:51,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431326760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:51,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570820718] [2021-06-12 20:39:51,865 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 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 [2021-06-12 20:39:51,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:39:51,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:51,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:39:51,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:52,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:52,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:52,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:52,215 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 29 treesize of output 17 [2021-06-12 20:39:52,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:52,229 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-12 20:39:52,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:52,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-12 20:39:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:52,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570820718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:52,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:52,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-12 20:39:52,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182195002] [2021-06-12 20:39:52,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:39:52,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:52,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:39:52,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:52,278 INFO L87 Difference]: Start difference. First operand 4507 states and 20076 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-06-12 20:39:53,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:53,454 INFO L93 Difference]: Finished difference Result 4932 states and 21671 transitions. [2021-06-12 20:39:53,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:39:53,455 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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 30 [2021-06-12 20:39:53,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:53,464 INFO L225 Difference]: With dead ends: 4932 [2021-06-12 20:39:53,464 INFO L226 Difference]: Without dead ends: 4868 [2021-06-12 20:39:53,464 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 795.2ms TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:39:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4868 states. [2021-06-12 20:39:53,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4868 to 4514. [2021-06-12 20:39:53,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4514 states, 4513 states have (on average 4.453800132949258) internal successors, (20100), 4513 states have internal predecessors, (20100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:53,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4514 states to 4514 states and 20100 transitions. [2021-06-12 20:39:53,530 INFO L78 Accepts]: Start accepts. Automaton has 4514 states and 20100 transitions. Word has length 30 [2021-06-12 20:39:53,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:53,530 INFO L482 AbstractCegarLoop]: Abstraction has 4514 states and 20100 transitions. [2021-06-12 20:39:53,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-06-12 20:39:53,530 INFO L276 IsEmpty]: Start isEmpty. Operand 4514 states and 20100 transitions. [2021-06-12 20:39:53,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:53,536 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:53,536 INFO L472 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, 1] [2021-06-12 20:39:53,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:53,737 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:53,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:53,737 INFO L82 PathProgramCache]: Analyzing trace with hash 854849306, now seen corresponding path program 34 times [2021-06-12 20:39:53,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:53,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767000488] [2021-06-12 20:39:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:53,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:53,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767000488] [2021-06-12 20:39:53,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767000488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:53,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092757079] [2021-06-12 20:39:53,945 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 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 [2021-06-12 20:39:53,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:39:53,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:53,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:53,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:54,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:54,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:54,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:54,190 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 33 treesize of output 17 [2021-06-12 20:39:54,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:54,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:54,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:54,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-12 20:39:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:54,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092757079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:54,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:54,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-12 20:39:54,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188676253] [2021-06-12 20:39:54,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:54,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:54,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:54,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:54,270 INFO L87 Difference]: Start difference. First operand 4514 states and 20100 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:39:55,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:55,414 INFO L93 Difference]: Finished difference Result 5116 states and 22500 transitions. [2021-06-12 20:39:55,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:39:55,415 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:39:55,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:55,426 INFO L225 Difference]: With dead ends: 5116 [2021-06-12 20:39:55,426 INFO L226 Difference]: Without dead ends: 5052 [2021-06-12 20:39:55,426 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 706.4ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:39:55,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5052 states. [2021-06-12 20:39:55,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5052 to 4488. [2021-06-12 20:39:55,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4487 states have (on average 4.46021840873635) internal successors, (20013), 4487 states have internal predecessors, (20013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:55,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 20013 transitions. [2021-06-12 20:39:55,509 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 20013 transitions. Word has length 30 [2021-06-12 20:39:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:55,509 INFO L482 AbstractCegarLoop]: Abstraction has 4488 states and 20013 transitions. [2021-06-12 20:39:55,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:39:55,510 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 20013 transitions. [2021-06-12 20:39:55,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:55,517 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:55,517 INFO L472 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, 1] [2021-06-12 20:39:55,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-12 20:39:55,718 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:55,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:55,718 INFO L82 PathProgramCache]: Analyzing trace with hash 528698014, now seen corresponding path program 35 times [2021-06-12 20:39:55,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:55,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694999916] [2021-06-12 20:39:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:55,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:55,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694999916] [2021-06-12 20:39:55,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694999916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:55,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363482466] [2021-06-12 20:39:55,960 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 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 [2021-06-12 20:39:56,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:39:56,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:56,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:56,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:56,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:56,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:56,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:56,262 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 33 treesize of output 17 [2021-06-12 20:39:56,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:56,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:56,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:56,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-12 20:39:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:56,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363482466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:56,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:56,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:39:56,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602301727] [2021-06-12 20:39:56,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:39:56,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:56,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:39:56,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:39:56,323 INFO L87 Difference]: Start difference. First operand 4488 states and 20013 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:39:57,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:57,562 INFO L93 Difference]: Finished difference Result 5478 states and 23917 transitions. [2021-06-12 20:39:57,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:39:57,563 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-06-12 20:39:57,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:57,575 INFO L225 Difference]: With dead ends: 5478 [2021-06-12 20:39:57,575 INFO L226 Difference]: Without dead ends: 5414 [2021-06-12 20:39:57,575 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 904.4ms TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:39:57,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5414 states. [2021-06-12 20:39:57,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5414 to 4481. [2021-06-12 20:39:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4481 states, 4480 states have (on average 4.4618303571428575) internal successors, (19989), 4480 states have internal predecessors, (19989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4481 states to 4481 states and 19989 transitions. [2021-06-12 20:39:57,701 INFO L78 Accepts]: Start accepts. Automaton has 4481 states and 19989 transitions. Word has length 30 [2021-06-12 20:39:57,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:57,701 INFO L482 AbstractCegarLoop]: Abstraction has 4481 states and 19989 transitions. [2021-06-12 20:39:57,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:39:57,701 INFO L276 IsEmpty]: Start isEmpty. Operand 4481 states and 19989 transitions. [2021-06-12 20:39:57,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:57,709 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:57,709 INFO L472 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] [2021-06-12 20:39:57,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-12 20:39:57,909 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:57,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:57,910 INFO L82 PathProgramCache]: Analyzing trace with hash 855600944, now seen corresponding path program 57 times [2021-06-12 20:39:57,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:57,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166493147] [2021-06-12 20:39:57,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:58,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:58,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166493147] [2021-06-12 20:39:58,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166493147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:58,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24188011] [2021-06-12 20:39:58,080 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 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 [2021-06-12 20:39:58,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:39:58,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:58,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:58,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:58,256 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 [2021-06-12 20:39:58,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:58,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:58,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:58,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:39:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:58,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24188011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:58,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:58,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:39:58,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69684954] [2021-06-12 20:39:58,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:58,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:58,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:58,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:58,293 INFO L87 Difference]: Start difference. First operand 4481 states and 19989 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-06-12 20:39:59,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:59,792 INFO L93 Difference]: Finished difference Result 6523 states and 28088 transitions. [2021-06-12 20:39:59,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:39:59,793 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 30 [2021-06-12 20:39:59,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:59,808 INFO L225 Difference]: With dead ends: 6523 [2021-06-12 20:39:59,808 INFO L226 Difference]: Without dead ends: 6225 [2021-06-12 20:39:59,808 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 979.3ms TimeCoverageRelationStatistics Valid=500, Invalid=2256, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:39:59,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6225 states. [2021-06-12 20:39:59,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6225 to 4543. [2021-06-12 20:39:59,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4543 states, 4542 states have (on average 4.454205195948921) internal successors, (20231), 4542 states have internal predecessors, (20231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:59,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4543 states to 4543 states and 20231 transitions. [2021-06-12 20:39:59,896 INFO L78 Accepts]: Start accepts. Automaton has 4543 states and 20231 transitions. Word has length 30 [2021-06-12 20:39:59,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:59,896 INFO L482 AbstractCegarLoop]: Abstraction has 4543 states and 20231 transitions. [2021-06-12 20:39:59,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-06-12 20:39:59,896 INFO L276 IsEmpty]: Start isEmpty. Operand 4543 states and 20231 transitions. [2021-06-12 20:39:59,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:39:59,904 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:59,904 INFO L472 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] [2021-06-12 20:40:00,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-12 20:40:00,105 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:00,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:00,105 INFO L82 PathProgramCache]: Analyzing trace with hash -2134626958, now seen corresponding path program 37 times [2021-06-12 20:40:00,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:00,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005751079] [2021-06-12 20:40:00,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:00,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:00,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005751079] [2021-06-12 20:40:00,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005751079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:00,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725321985] [2021-06-12 20:40:00,333 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 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 [2021-06-12 20:40:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:00,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:00,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:00,516 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 [2021-06-12 20:40:00,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:00,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:00,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:00,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:40:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:00,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725321985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:00,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:00,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:40:00,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443157321] [2021-06-12 20:40:00,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:00,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:00,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:00,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:00,555 INFO L87 Difference]: Start difference. First operand 4543 states and 20231 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:40:02,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:02,555 INFO L93 Difference]: Finished difference Result 6091 states and 26441 transitions. [2021-06-12 20:40:02,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:40:02,555 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 30 [2021-06-12 20:40:02,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:02,569 INFO L225 Difference]: With dead ends: 6091 [2021-06-12 20:40:02,569 INFO L226 Difference]: Without dead ends: 5924 [2021-06-12 20:40:02,570 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1474.5ms TimeCoverageRelationStatistics Valid=418, Invalid=2032, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:40:02,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5924 states. [2021-06-12 20:40:02,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5924 to 4547. [2021-06-12 20:40:02,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4547 states, 4546 states have (on average 4.449846018477783) internal successors, (20229), 4546 states have internal predecessors, (20229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:02,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4547 states to 4547 states and 20229 transitions. [2021-06-12 20:40:02,694 INFO L78 Accepts]: Start accepts. Automaton has 4547 states and 20229 transitions. Word has length 30 [2021-06-12 20:40:02,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:02,694 INFO L482 AbstractCegarLoop]: Abstraction has 4547 states and 20229 transitions. [2021-06-12 20:40:02,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:40:02,694 INFO L276 IsEmpty]: Start isEmpty. Operand 4547 states and 20229 transitions. [2021-06-12 20:40:02,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:40:02,702 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:02,702 INFO L472 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] [2021-06-12 20:40:02,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-12 20:40:02,902 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:02,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:02,903 INFO L82 PathProgramCache]: Analyzing trace with hash 274105212, now seen corresponding path program 58 times [2021-06-12 20:40:02,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:02,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725604411] [2021-06-12 20:40:02,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:03,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:03,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725604411] [2021-06-12 20:40:03,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725604411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:03,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469813615] [2021-06-12 20:40:03,072 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 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 [2021-06-12 20:40:03,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:40:03,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:03,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:03,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:03,222 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 [2021-06-12 20:40:03,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:03,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:03,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:03,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:40:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:03,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469813615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:03,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:03,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:40:03,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654429017] [2021-06-12 20:40:03,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:40:03,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:03,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:40:03,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:40:03,279 INFO L87 Difference]: Start difference. First operand 4547 states and 20229 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:40:04,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:04,682 INFO L93 Difference]: Finished difference Result 6231 states and 26873 transitions. [2021-06-12 20:40:04,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:40:04,682 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-06-12 20:40:04,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:04,696 INFO L225 Difference]: With dead ends: 6231 [2021-06-12 20:40:04,696 INFO L226 Difference]: Without dead ends: 6071 [2021-06-12 20:40:04,696 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1104.4ms TimeCoverageRelationStatistics Valid=397, Invalid=1765, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:40:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6071 states. [2021-06-12 20:40:04,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6071 to 4593. [2021-06-12 20:40:04,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4593 states, 4592 states have (on average 4.450783972125436) internal successors, (20438), 4592 states have internal predecessors, (20438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:04,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4593 states to 4593 states and 20438 transitions. [2021-06-12 20:40:04,804 INFO L78 Accepts]: Start accepts. Automaton has 4593 states and 20438 transitions. Word has length 30 [2021-06-12 20:40:04,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:04,804 INFO L482 AbstractCegarLoop]: Abstraction has 4593 states and 20438 transitions. [2021-06-12 20:40:04,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:40:04,804 INFO L276 IsEmpty]: Start isEmpty. Operand 4593 states and 20438 transitions. [2021-06-12 20:40:04,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:40:04,812 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:04,812 INFO L472 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] [2021-06-12 20:40:05,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-06-12 20:40:05,013 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:05,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1826877156, now seen corresponding path program 59 times [2021-06-12 20:40:05,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:05,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598804725] [2021-06-12 20:40:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:05,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:05,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598804725] [2021-06-12 20:40:05,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598804725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:05,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798780892] [2021-06-12 20:40:05,233 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 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 [2021-06-12 20:40:05,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:40:05,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:05,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:05,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:05,383 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 [2021-06-12 20:40:05,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:05,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:05,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:05,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:40:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:05,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798780892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:05,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:05,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:40:05,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995963858] [2021-06-12 20:40:05,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:40:05,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:05,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:40:05,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:40:05,440 INFO L87 Difference]: Start difference. First operand 4593 states and 20438 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:40:06,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:06,957 INFO L93 Difference]: Finished difference Result 6496 states and 27804 transitions. [2021-06-12 20:40:06,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 20:40:06,958 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-06-12 20:40:06,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:06,973 INFO L225 Difference]: With dead ends: 6496 [2021-06-12 20:40:06,973 INFO L226 Difference]: Without dead ends: 6184 [2021-06-12 20:40:06,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1171.8ms TimeCoverageRelationStatistics Valid=484, Invalid=2066, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:40:06,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6184 states. [2021-06-12 20:40:07,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6184 to 4621. [2021-06-12 20:40:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4621 states, 4620 states have (on average 4.450432900432901) internal successors, (20561), 4620 states have internal predecessors, (20561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4621 states to 4621 states and 20561 transitions. [2021-06-12 20:40:07,069 INFO L78 Accepts]: Start accepts. Automaton has 4621 states and 20561 transitions. Word has length 30 [2021-06-12 20:40:07,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:07,069 INFO L482 AbstractCegarLoop]: Abstraction has 4621 states and 20561 transitions. [2021-06-12 20:40:07,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:40:07,069 INFO L276 IsEmpty]: Start isEmpty. Operand 4621 states and 20561 transitions. [2021-06-12 20:40:07,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:40:07,077 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:07,077 INFO L472 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] [2021-06-12 20:40:07,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:07,278 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:07,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:07,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1892384642, now seen corresponding path program 38 times [2021-06-12 20:40:07,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:07,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748660601] [2021-06-12 20:40:07,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:07,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:07,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748660601] [2021-06-12 20:40:07,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748660601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:07,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595463904] [2021-06-12 20:40:07,449 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 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 [2021-06-12 20:40:07,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:40:07,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:07,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:40:07,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:07,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:07,658 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 [2021-06-12 20:40:07,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:07,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:07,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:07,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:40:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:07,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595463904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:07,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:07,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:40:07,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348869464] [2021-06-12 20:40:07,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:07,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:07,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:07,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:07,771 INFO L87 Difference]: Start difference. First operand 4621 states and 20561 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:40:09,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:09,650 INFO L93 Difference]: Finished difference Result 5945 states and 25728 transitions. [2021-06-12 20:40:09,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 20:40:09,650 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:40:09,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:09,664 INFO L225 Difference]: With dead ends: 5945 [2021-06-12 20:40:09,664 INFO L226 Difference]: Without dead ends: 5694 [2021-06-12 20:40:09,665 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1486.2ms TimeCoverageRelationStatistics Valid=468, Invalid=2612, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 20:40:09,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5694 states. [2021-06-12 20:40:09,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5694 to 4646. [2021-06-12 20:40:09,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4646 states, 4645 states have (on average 4.4443487621097955) internal successors, (20644), 4645 states have internal predecessors, (20644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:09,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4646 states to 4646 states and 20644 transitions. [2021-06-12 20:40:09,755 INFO L78 Accepts]: Start accepts. Automaton has 4646 states and 20644 transitions. Word has length 30 [2021-06-12 20:40:09,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:09,755 INFO L482 AbstractCegarLoop]: Abstraction has 4646 states and 20644 transitions. [2021-06-12 20:40:09,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:40:09,755 INFO L276 IsEmpty]: Start isEmpty. Operand 4646 states and 20644 transitions. [2021-06-12 20:40:09,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:40:09,763 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:09,763 INFO L472 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] [2021-06-12 20:40:09,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-12 20:40:09,964 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:09,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:09,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1006995578, now seen corresponding path program 39 times [2021-06-12 20:40:09,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:09,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477055078] [2021-06-12 20:40:09,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:10,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:10,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477055078] [2021-06-12 20:40:10,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477055078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:10,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483631088] [2021-06-12 20:40:10,210 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 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 [2021-06-12 20:40:10,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:40:10,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:10,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:40:10,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:10,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:10,379 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 [2021-06-12 20:40:10,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:10,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:10,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:10,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:40:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:10,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483631088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:10,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:10,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:40:10,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905838000] [2021-06-12 20:40:10,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:10,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:10,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:10,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:10,494 INFO L87 Difference]: Start difference. First operand 4646 states and 20644 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:40:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:12,416 INFO L93 Difference]: Finished difference Result 6089 states and 26326 transitions. [2021-06-12 20:40:12,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 20:40:12,416 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:40:12,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:12,429 INFO L225 Difference]: With dead ends: 6089 [2021-06-12 20:40:12,429 INFO L226 Difference]: Without dead ends: 5798 [2021-06-12 20:40:12,429 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1551.4ms TimeCoverageRelationStatistics Valid=524, Invalid=2556, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 20:40:12,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2021-06-12 20:40:12,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 4637. [2021-06-12 20:40:12,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 4.446505608283003) internal successors, (20614), 4636 states have internal predecessors, (20614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:12,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 20614 transitions. [2021-06-12 20:40:12,536 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 20614 transitions. Word has length 30 [2021-06-12 20:40:12,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:12,536 INFO L482 AbstractCegarLoop]: Abstraction has 4637 states and 20614 transitions. [2021-06-12 20:40:12,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:40:12,536 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 20614 transitions. [2021-06-12 20:40:12,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:40:12,545 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:12,545 INFO L472 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] [2021-06-12 20:40:12,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:12,745 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:12,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:12,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1221508570, now seen corresponding path program 6 times [2021-06-12 20:40:12,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:12,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924969529] [2021-06-12 20:40:12,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:12,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:12,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924969529] [2021-06-12 20:40:12,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924969529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:12,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343573553] [2021-06-12 20:40:12,918 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 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 [2021-06-12 20:40:12,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:40:12,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:12,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:12,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:13,098 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 [2021-06-12 20:40:13,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:13,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:13,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:13,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:40:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:13,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343573553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:13,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:13,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:40:13,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154533733] [2021-06-12 20:40:13,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:40:13,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:13,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:40:13,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:40:13,152 INFO L87 Difference]: Start difference. First operand 4637 states and 20614 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:40:14,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:14,453 INFO L93 Difference]: Finished difference Result 5984 states and 26045 transitions. [2021-06-12 20:40:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:40:14,453 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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 30 [2021-06-12 20:40:14,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:14,467 INFO L225 Difference]: With dead ends: 5984 [2021-06-12 20:40:14,467 INFO L226 Difference]: Without dead ends: 5866 [2021-06-12 20:40:14,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 976.7ms TimeCoverageRelationStatistics Valid=353, Invalid=1627, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:40:14,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5866 states. [2021-06-12 20:40:14,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5866 to 4672. [2021-06-12 20:40:14,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4672 states, 4671 states have (on average 4.442303575251552) internal successors, (20750), 4671 states have internal predecessors, (20750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:14,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 20750 transitions. [2021-06-12 20:40:14,559 INFO L78 Accepts]: Start accepts. Automaton has 4672 states and 20750 transitions. Word has length 30 [2021-06-12 20:40:14,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:14,559 INFO L482 AbstractCegarLoop]: Abstraction has 4672 states and 20750 transitions. [2021-06-12 20:40:14,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:40:14,559 INFO L276 IsEmpty]: Start isEmpty. Operand 4672 states and 20750 transitions. [2021-06-12 20:40:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:40:14,568 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:14,568 INFO L472 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] [2021-06-12 20:40:14,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-06-12 20:40:14,769 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:14,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:14,769 INFO L82 PathProgramCache]: Analyzing trace with hash 501075102, now seen corresponding path program 7 times [2021-06-12 20:40:14,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:14,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805773616] [2021-06-12 20:40:14,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:14,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:14,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805773616] [2021-06-12 20:40:14,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805773616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:14,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852946227] [2021-06-12 20:40:14,962 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 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 [2021-06-12 20:40:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:14,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:14,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:15,115 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 [2021-06-12 20:40:15,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:15,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:15,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:15,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:40:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:15,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852946227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:15,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:15,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:40:15,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240984636] [2021-06-12 20:40:15,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:40:15,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:15,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:40:15,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:40:15,171 INFO L87 Difference]: Start difference. First operand 4672 states and 20750 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:40:16,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:16,692 INFO L93 Difference]: Finished difference Result 6211 states and 26962 transitions. [2021-06-12 20:40:16,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:40:16,693 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-06-12 20:40:16,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:16,708 INFO L225 Difference]: With dead ends: 6211 [2021-06-12 20:40:16,708 INFO L226 Difference]: Without dead ends: 6067 [2021-06-12 20:40:16,709 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1149.2ms TimeCoverageRelationStatistics Valid=471, Invalid=2079, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:40:16,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6067 states. [2021-06-12 20:40:16,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6067 to 4665. [2021-06-12 20:40:16,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 4.442109777015437) internal successors, (20718), 4664 states have internal predecessors, (20718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 20718 transitions. [2021-06-12 20:40:16,803 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 20718 transitions. Word has length 30 [2021-06-12 20:40:16,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:16,803 INFO L482 AbstractCegarLoop]: Abstraction has 4665 states and 20718 transitions. [2021-06-12 20:40:16,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:40:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 20718 transitions. [2021-06-12 20:40:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:40:16,811 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:16,811 INFO L472 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] [2021-06-12 20:40:17,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-12 20:40:17,012 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:17,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:17,012 INFO L82 PathProgramCache]: Analyzing trace with hash -697029920, now seen corresponding path program 8 times [2021-06-12 20:40:17,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:17,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938933584] [2021-06-12 20:40:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:17,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:17,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938933584] [2021-06-12 20:40:17,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938933584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:17,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206346432] [2021-06-12 20:40:17,176 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 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 [2021-06-12 20:40:17,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:40:17,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:17,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:40:17,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:17,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:17,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:40:17,468 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 [2021-06-12 20:40:17,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:17,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:17,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:17,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:40:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:17,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206346432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:17,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:17,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:40:17,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026808804] [2021-06-12 20:40:17,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:40:17,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:17,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:40:17,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:40:17,512 INFO L87 Difference]: Start difference. First operand 4665 states and 20718 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2021-06-12 20:40:19,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:19,783 INFO L93 Difference]: Finished difference Result 6337 states and 27396 transitions. [2021-06-12 20:40:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 20:40:19,783 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 30 [2021-06-12 20:40:19,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:19,798 INFO L225 Difference]: With dead ends: 6337 [2021-06-12 20:40:19,798 INFO L226 Difference]: Without dead ends: 6143 [2021-06-12 20:40:19,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1572.6ms TimeCoverageRelationStatistics Valid=635, Invalid=2905, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:40:19,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6143 states. [2021-06-12 20:40:19,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6143 to 4665. [2021-06-12 20:40:19,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 4.442109777015437) internal successors, (20718), 4664 states have internal predecessors, (20718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:19,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 20718 transitions. [2021-06-12 20:40:19,921 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 20718 transitions. Word has length 30 [2021-06-12 20:40:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:19,921 INFO L482 AbstractCegarLoop]: Abstraction has 4665 states and 20718 transitions. [2021-06-12 20:40:19,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2021-06-12 20:40:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 20718 transitions. [2021-06-12 20:40:19,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:40:19,929 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:19,929 INFO L472 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, 1] [2021-06-12 20:40:20,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable467 [2021-06-12 20:40:20,130 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:20,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:20,130 INFO L82 PathProgramCache]: Analyzing trace with hash 607709474, now seen corresponding path program 36 times [2021-06-12 20:40:20,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:20,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479396008] [2021-06-12 20:40:20,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:20,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:20,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479396008] [2021-06-12 20:40:20,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479396008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:20,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092626962] [2021-06-12 20:40:20,303 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 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 [2021-06-12 20:40:20,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:40:20,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:20,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:40:20,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:20,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:20,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:40:20,543 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 [2021-06-12 20:40:20,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:20,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:20,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:20,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:40:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:20,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092626962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:20,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:20,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:40:20,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010531917] [2021-06-12 20:40:20,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:40:20,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:20,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:40:20,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:40:20,586 INFO L87 Difference]: Start difference. First operand 4665 states and 20718 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-06-12 20:40:22,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:22,589 INFO L93 Difference]: Finished difference Result 5990 states and 26037 transitions. [2021-06-12 20:40:22,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 20:40:22,589 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 30 [2021-06-12 20:40:22,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:22,602 INFO L225 Difference]: With dead ends: 5990 [2021-06-12 20:40:22,603 INFO L226 Difference]: Without dead ends: 5853 [2021-06-12 20:40:22,603 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1484.8ms TimeCoverageRelationStatistics Valid=542, Invalid=2428, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:40:22,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5853 states. [2021-06-12 20:40:22,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5853 to 4667. [2021-06-12 20:40:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 4.4402057436776685) internal successors, (20718), 4666 states have internal predecessors, (20718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:22,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 20718 transitions. [2021-06-12 20:40:22,693 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 20718 transitions. Word has length 30 [2021-06-12 20:40:22,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:22,694 INFO L482 AbstractCegarLoop]: Abstraction has 4667 states and 20718 transitions. [2021-06-12 20:40:22,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-06-12 20:40:22,694 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 20718 transitions. [2021-06-12 20:40:22,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:40:22,702 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:22,702 INFO L472 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, 1] [2021-06-12 20:40:22,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-12 20:40:22,902 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:22,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:22,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1424785500, now seen corresponding path program 37 times [2021-06-12 20:40:22,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:22,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104298474] [2021-06-12 20:40:22,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:23,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:23,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104298474] [2021-06-12 20:40:23,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104298474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:23,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787534685] [2021-06-12 20:40:23,064 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 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 [2021-06-12 20:40:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:23,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:23,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:23,228 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 [2021-06-12 20:40:23,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:23,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:23,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:23,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:40:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:23,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787534685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:23,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:23,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:40:23,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060964470] [2021-06-12 20:40:23,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:40:23,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:23,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:40:23,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:40:23,284 INFO L87 Difference]: Start difference. First operand 4667 states and 20718 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:40:24,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:24,765 INFO L93 Difference]: Finished difference Result 5752 states and 25132 transitions. [2021-06-12 20:40:24,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:40:24,766 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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 30 [2021-06-12 20:40:24,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:24,779 INFO L225 Difference]: With dead ends: 5752 [2021-06-12 20:40:24,779 INFO L226 Difference]: Without dead ends: 5654 [2021-06-12 20:40:24,779 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1096.5ms TimeCoverageRelationStatistics Valid=345, Invalid=1635, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:40:24,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5654 states. [2021-06-12 20:40:24,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5654 to 4679. [2021-06-12 20:40:24,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4679 states, 4678 states have (on average 4.438221462163318) internal successors, (20762), 4678 states have internal predecessors, (20762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:24,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 20762 transitions. [2021-06-12 20:40:24,897 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 20762 transitions. Word has length 30 [2021-06-12 20:40:24,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:24,897 INFO L482 AbstractCegarLoop]: Abstraction has 4679 states and 20762 transitions. [2021-06-12 20:40:24,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:40:24,898 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 20762 transitions. [2021-06-12 20:40:24,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:40:24,905 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:24,906 INFO L472 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, 1] [2021-06-12 20:40:25,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:25,106 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:25,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:25,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1060027848, now seen corresponding path program 38 times [2021-06-12 20:40:25,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:25,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991014681] [2021-06-12 20:40:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:25,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:25,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991014681] [2021-06-12 20:40:25,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991014681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:25,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293566995] [2021-06-12 20:40:25,249 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 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 [2021-06-12 20:40:25,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:40:25,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:25,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:25,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:25,411 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 [2021-06-12 20:40:25,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:25,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:25,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:25,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:40:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:25,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293566995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:25,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:25,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:40:25,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171112439] [2021-06-12 20:40:25,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:40:25,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:25,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:40:25,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:40:25,451 INFO L87 Difference]: Start difference. First operand 4679 states and 20762 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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) [2021-06-12 20:40:26,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:26,698 INFO L93 Difference]: Finished difference Result 5645 states and 24724 transitions. [2021-06-12 20:40:26,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:40:26,699 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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 30 [2021-06-12 20:40:26,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:26,712 INFO L225 Difference]: With dead ends: 5645 [2021-06-12 20:40:26,712 INFO L226 Difference]: Without dead ends: 5538 [2021-06-12 20:40:26,712 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 890.8ms TimeCoverageRelationStatistics Valid=283, Invalid=1199, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:40:26,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5538 states. [2021-06-12 20:40:26,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5538 to 4667. [2021-06-12 20:40:26,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 4.44127732533219) internal successors, (20723), 4666 states have internal predecessors, (20723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:26,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 20723 transitions. [2021-06-12 20:40:26,801 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 20723 transitions. Word has length 30 [2021-06-12 20:40:26,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:26,801 INFO L482 AbstractCegarLoop]: Abstraction has 4667 states and 20723 transitions. [2021-06-12 20:40:26,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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) [2021-06-12 20:40:26,801 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 20723 transitions. [2021-06-12 20:40:26,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:40:26,809 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:26,809 INFO L472 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] [2021-06-12 20:40:27,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:27,010 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:27,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:27,010 INFO L82 PathProgramCache]: Analyzing trace with hash -373359346, now seen corresponding path program 60 times [2021-06-12 20:40:27,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:27,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349892284] [2021-06-12 20:40:27,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:27,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:27,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349892284] [2021-06-12 20:40:27,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349892284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:27,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691918276] [2021-06-12 20:40:27,164 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 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 [2021-06-12 20:40:27,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:40:27,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:27,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:40:27,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:27,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:27,348 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 [2021-06-12 20:40:27,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:27,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:27,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:27,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:40:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:27,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691918276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:27,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:27,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:40:27,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148053762] [2021-06-12 20:40:27,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:27,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:27,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:27,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:27,479 INFO L87 Difference]: Start difference. First operand 4667 states and 20723 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-06-12 20:40:30,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:30,624 INFO L93 Difference]: Finished difference Result 9695 states and 40591 transitions. [2021-06-12 20:40:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-12 20:40:30,624 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 30 [2021-06-12 20:40:30,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:30,646 INFO L225 Difference]: With dead ends: 9695 [2021-06-12 20:40:30,646 INFO L226 Difference]: Without dead ends: 9327 [2021-06-12 20:40:30,647 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 2236.7ms TimeCoverageRelationStatistics Valid=930, Invalid=5550, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 20:40:30,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9327 states. [2021-06-12 20:40:30,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9327 to 4868. [2021-06-12 20:40:30,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4868 states, 4867 states have (on average 4.464762687487158) internal successors, (21730), 4867 states have internal predecessors, (21730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:30,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4868 states to 4868 states and 21730 transitions. [2021-06-12 20:40:30,780 INFO L78 Accepts]: Start accepts. Automaton has 4868 states and 21730 transitions. Word has length 30 [2021-06-12 20:40:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:30,780 INFO L482 AbstractCegarLoop]: Abstraction has 4868 states and 21730 transitions. [2021-06-12 20:40:30,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-06-12 20:40:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 4868 states and 21730 transitions. [2021-06-12 20:40:30,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:40:30,788 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:30,788 INFO L472 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] [2021-06-12 20:40:30,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:30,989 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:30,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:30,989 INFO L82 PathProgramCache]: Analyzing trace with hash -959827704, now seen corresponding path program 9 times [2021-06-12 20:40:30,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:30,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042704756] [2021-06-12 20:40:30,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:31,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:31,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042704756] [2021-06-12 20:40:31,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042704756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:31,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132297918] [2021-06-12 20:40:31,152 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 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 [2021-06-12 20:40:31,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:40:31,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:31,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:40:31,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:31,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:31,337 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 [2021-06-12 20:40:31,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:31,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:31,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:31,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-12 20:40:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:31,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132297918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:31,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:31,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:40:31,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11199453] [2021-06-12 20:40:31,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:31,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:31,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:31,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:31,433 INFO L87 Difference]: Start difference. First operand 4868 states and 21730 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-06-12 20:40:34,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:34,828 INFO L93 Difference]: Finished difference Result 9420 states and 38753 transitions. [2021-06-12 20:40:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-12 20:40:34,828 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 30 [2021-06-12 20:40:34,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:34,845 INFO L225 Difference]: With dead ends: 9420 [2021-06-12 20:40:34,845 INFO L226 Difference]: Without dead ends: 8855 [2021-06-12 20:40:34,846 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 2248.0ms TimeCoverageRelationStatistics Valid=820, Invalid=5342, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 20:40:34,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8855 states. [2021-06-12 20:40:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8855 to 5123. [2021-06-12 20:40:34,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5123 states, 5122 states have (on average 4.437914877001171) internal successors, (22731), 5122 states have internal predecessors, (22731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5123 states to 5123 states and 22731 transitions. [2021-06-12 20:40:34,995 INFO L78 Accepts]: Start accepts. Automaton has 5123 states and 22731 transitions. Word has length 30 [2021-06-12 20:40:34,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:34,995 INFO L482 AbstractCegarLoop]: Abstraction has 5123 states and 22731 transitions. [2021-06-12 20:40:34,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-06-12 20:40:34,996 INFO L276 IsEmpty]: Start isEmpty. Operand 5123 states and 22731 transitions. [2021-06-12 20:40:35,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:40:35,005 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:35,005 INFO L472 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] [2021-06-12 20:40:35,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable474,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:35,209 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:35,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:35,209 INFO L82 PathProgramCache]: Analyzing trace with hash -457758120, now seen corresponding path program 61 times [2021-06-12 20:40:35,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:35,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883059390] [2021-06-12 20:40:35,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:35,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:35,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883059390] [2021-06-12 20:40:35,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883059390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:35,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525262677] [2021-06-12 20:40:35,379 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 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 [2021-06-12 20:40:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:35,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:35,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:35,536 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 [2021-06-12 20:40:35,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:35,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:35,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:35,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:40:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:35,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525262677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:35,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:35,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:40:35,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256584810] [2021-06-12 20:40:35,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:40:35,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:35,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:40:35,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:40:35,597 INFO L87 Difference]: Start difference. First operand 5123 states and 22731 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:40:39,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:39,094 INFO L93 Difference]: Finished difference Result 11828 states and 49593 transitions. [2021-06-12 20:40:39,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 20:40:39,094 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-06-12 20:40:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:39,121 INFO L225 Difference]: With dead ends: 11828 [2021-06-12 20:40:39,121 INFO L226 Difference]: Without dead ends: 11341 [2021-06-12 20:40:39,121 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2022 ImplicationChecksByTransitivity, 2436.9ms TimeCoverageRelationStatistics Valid=953, Invalid=5053, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 20:40:39,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11341 states. [2021-06-12 20:40:39,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11341 to 6262. [2021-06-12 20:40:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6262 states, 6261 states have (on average 4.507586647500399) internal successors, (28222), 6261 states have internal predecessors, (28222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:39,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6262 states to 6262 states and 28222 transitions. [2021-06-12 20:40:39,294 INFO L78 Accepts]: Start accepts. Automaton has 6262 states and 28222 transitions. Word has length 30 [2021-06-12 20:40:39,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:39,294 INFO L482 AbstractCegarLoop]: Abstraction has 6262 states and 28222 transitions. [2021-06-12 20:40:39,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:40:39,294 INFO L276 IsEmpty]: Start isEmpty. Operand 6262 states and 28222 transitions. [2021-06-12 20:40:39,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:40:39,306 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:39,306 INFO L472 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] [2021-06-12 20:40:39,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-12 20:40:39,506 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:39,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:39,507 INFO L82 PathProgramCache]: Analyzing trace with hash 433531888, now seen corresponding path program 62 times [2021-06-12 20:40:39,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:39,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196773735] [2021-06-12 20:40:39,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:39,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:39,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196773735] [2021-06-12 20:40:39,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196773735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:39,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291370080] [2021-06-12 20:40:39,686 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 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 [2021-06-12 20:40:39,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:40:39,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:39,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:40:39,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:39,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:39,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-12 20:40:39,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:39,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:39,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:39,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:40:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:40,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291370080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:40,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:40,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:40:40,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313690571] [2021-06-12 20:40:40,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:40,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:40,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:40,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:40,012 INFO L87 Difference]: Start difference. First operand 6262 states and 28222 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-06-12 20:40:43,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:43,824 INFO L93 Difference]: Finished difference Result 11813 states and 49936 transitions. [2021-06-12 20:40:43,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 20:40:43,825 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 30 [2021-06-12 20:40:43,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:43,851 INFO L225 Difference]: With dead ends: 11813 [2021-06-12 20:40:43,851 INFO L226 Difference]: Without dead ends: 11371 [2021-06-12 20:40:43,851 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2154 ImplicationChecksByTransitivity, 2864.8ms TimeCoverageRelationStatistics Valid=907, Invalid=5573, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 20:40:43,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11371 states. [2021-06-12 20:40:44,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11371 to 6793. [2021-06-12 20:40:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6793 states, 6792 states have (on average 4.523998822143699) internal successors, (30727), 6792 states have internal predecessors, (30727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6793 states to 6793 states and 30727 transitions. [2021-06-12 20:40:44,029 INFO L78 Accepts]: Start accepts. Automaton has 6793 states and 30727 transitions. Word has length 30 [2021-06-12 20:40:44,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:44,029 INFO L482 AbstractCegarLoop]: Abstraction has 6793 states and 30727 transitions. [2021-06-12 20:40:44,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-06-12 20:40:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 6793 states and 30727 transitions. [2021-06-12 20:40:44,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:40:44,042 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:44,042 INFO L472 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] [2021-06-12 20:40:44,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-12 20:40:44,243 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:44,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:44,243 INFO L82 PathProgramCache]: Analyzing trace with hash -888375012, now seen corresponding path program 10 times [2021-06-12 20:40:44,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:44,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564529418] [2021-06-12 20:40:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:44,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:44,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564529418] [2021-06-12 20:40:44,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564529418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:44,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407660702] [2021-06-12 20:40:44,393 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 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 [2021-06-12 20:40:44,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:40:44,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:44,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:44,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:44,546 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 [2021-06-12 20:40:44,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:44,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:44,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:44,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:40:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:44,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407660702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:44,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:44,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:40:44,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93411002] [2021-06-12 20:40:44,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:40:44,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:44,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:40:44,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:40:44,651 INFO L87 Difference]: Start difference. First operand 6793 states and 30727 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:40:46,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:46,558 INFO L93 Difference]: Finished difference Result 11844 states and 50547 transitions. [2021-06-12 20:40:46,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 20:40:46,559 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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 30 [2021-06-12 20:40:46,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:46,586 INFO L225 Difference]: With dead ends: 11844 [2021-06-12 20:40:46,586 INFO L226 Difference]: Without dead ends: 11557 [2021-06-12 20:40:46,587 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 1267.1ms TimeCoverageRelationStatistics Valid=577, Invalid=2729, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 20:40:46,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11557 states. [2021-06-12 20:40:46,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11557 to 7034. [2021-06-12 20:40:46,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7034 states, 7033 states have (on average 4.512299161097682) internal successors, (31735), 7033 states have internal predecessors, (31735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:46,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7034 states to 7034 states and 31735 transitions. [2021-06-12 20:40:46,814 INFO L78 Accepts]: Start accepts. Automaton has 7034 states and 31735 transitions. Word has length 30 [2021-06-12 20:40:46,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:46,814 INFO L482 AbstractCegarLoop]: Abstraction has 7034 states and 31735 transitions. [2021-06-12 20:40:46,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:40:46,814 INFO L276 IsEmpty]: Start isEmpty. Operand 7034 states and 31735 transitions. [2021-06-12 20:40:46,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:40:46,827 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:46,827 INFO L472 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] [2021-06-12 20:40:47,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2021-06-12 20:40:47,027 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:47,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:47,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2024676880, now seen corresponding path program 11 times [2021-06-12 20:40:47,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:47,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201140956] [2021-06-12 20:40:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:47,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:47,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:47,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201140956] [2021-06-12 20:40:47,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201140956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:47,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172484261] [2021-06-12 20:40:47,178 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 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 [2021-06-12 20:40:47,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:40:47,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:47,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:47,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:47,341 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 [2021-06-12 20:40:47,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:47,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:47,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:47,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:40:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:47,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172484261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:47,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:47,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:40:47,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636420782] [2021-06-12 20:40:47,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:40:47,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:47,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:40:47,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:40:47,413 INFO L87 Difference]: Start difference. First operand 7034 states and 31735 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:40:49,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:49,573 INFO L93 Difference]: Finished difference Result 14096 states and 58966 transitions. [2021-06-12 20:40:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 20:40:49,574 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-06-12 20:40:49,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:49,609 INFO L225 Difference]: With dead ends: 14096 [2021-06-12 20:40:49,609 INFO L226 Difference]: Without dead ends: 13488 [2021-06-12 20:40:49,609 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 1513.8ms TimeCoverageRelationStatistics Valid=871, Invalid=3685, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 20:40:49,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13488 states. [2021-06-12 20:40:49,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13488 to 7392. [2021-06-12 20:40:49,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7392 states, 7391 states have (on average 4.502232444865377) internal successors, (33276), 7391 states have internal predecessors, (33276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7392 states to 7392 states and 33276 transitions. [2021-06-12 20:40:49,814 INFO L78 Accepts]: Start accepts. Automaton has 7392 states and 33276 transitions. Word has length 30 [2021-06-12 20:40:49,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:49,814 INFO L482 AbstractCegarLoop]: Abstraction has 7392 states and 33276 transitions. [2021-06-12 20:40:49,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:40:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 7392 states and 33276 transitions. [2021-06-12 20:40:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:40:49,828 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:49,828 INFO L472 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] [2021-06-12 20:40:50,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:50,033 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:50,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:50,033 INFO L82 PathProgramCache]: Analyzing trace with hash -819317232, now seen corresponding path program 40 times [2021-06-12 20:40:50,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:50,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084685043] [2021-06-12 20:40:50,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:50,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:50,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084685043] [2021-06-12 20:40:50,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084685043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:50,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773067144] [2021-06-12 20:40:50,204 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 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 [2021-06-12 20:40:50,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:40:50,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:50,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:50,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:50,378 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 [2021-06-12 20:40:50,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:50,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:50,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:50,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:40:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:50,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773067144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:50,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:50,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:40:50,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777783661] [2021-06-12 20:40:50,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:40:50,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:50,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:40:50,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:40:50,417 INFO L87 Difference]: Start difference. First operand 7392 states and 33276 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:40:52,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:52,847 INFO L93 Difference]: Finished difference Result 11947 states and 51179 transitions. [2021-06-12 20:40:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 20:40:52,848 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 30 [2021-06-12 20:40:52,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:52,876 INFO L225 Difference]: With dead ends: 11947 [2021-06-12 20:40:52,876 INFO L226 Difference]: Without dead ends: 11713 [2021-06-12 20:40:52,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 1462.3ms TimeCoverageRelationStatistics Valid=514, Invalid=3146, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 20:40:52,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11713 states. [2021-06-12 20:40:53,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11713 to 7784. [2021-06-12 20:40:53,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7784 states, 7783 states have (on average 4.501991519979442) internal successors, (35039), 7783 states have internal predecessors, (35039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7784 states to 7784 states and 35039 transitions. [2021-06-12 20:40:53,075 INFO L78 Accepts]: Start accepts. Automaton has 7784 states and 35039 transitions. Word has length 30 [2021-06-12 20:40:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:53,075 INFO L482 AbstractCegarLoop]: Abstraction has 7784 states and 35039 transitions. [2021-06-12 20:40:53,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:40:53,075 INFO L276 IsEmpty]: Start isEmpty. Operand 7784 states and 35039 transitions. [2021-06-12 20:40:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:40:53,089 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:53,089 INFO L472 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, 1] [2021-06-12 20:40:53,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:53,290 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:53,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:53,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1529616390, now seen corresponding path program 39 times [2021-06-12 20:40:53,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:53,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679840300] [2021-06-12 20:40:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:53,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:53,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679840300] [2021-06-12 20:40:53,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679840300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:53,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062638356] [2021-06-12 20:40:53,457 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 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 [2021-06-12 20:40:53,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:40:53,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:53,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:40:53,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:53,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:53,676 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 [2021-06-12 20:40:53,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:53,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:53,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:53,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-12 20:40:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:53,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062638356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:53,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:53,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:40:53,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698627610] [2021-06-12 20:40:53,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:40:53,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:53,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:40:53,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:40:53,827 INFO L87 Difference]: Start difference. First operand 7784 states and 35039 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:40:57,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:57,050 INFO L93 Difference]: Finished difference Result 12267 states and 52308 transitions. [2021-06-12 20:40:57,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 20:40:57,050 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-06-12 20:40:57,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:57,077 INFO L225 Difference]: With dead ends: 12267 [2021-06-12 20:40:57,077 INFO L226 Difference]: Without dead ends: 12047 [2021-06-12 20:40:57,078 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 1958.4ms TimeCoverageRelationStatistics Valid=745, Invalid=4511, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 20:40:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12047 states. [2021-06-12 20:40:57,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12047 to 7916. [2021-06-12 20:40:57,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7916 states, 7915 states have (on average 4.492482627921667) internal successors, (35558), 7915 states have internal predecessors, (35558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7916 states to 7916 states and 35558 transitions. [2021-06-12 20:40:57,279 INFO L78 Accepts]: Start accepts. Automaton has 7916 states and 35558 transitions. Word has length 30 [2021-06-12 20:40:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:57,279 INFO L482 AbstractCegarLoop]: Abstraction has 7916 states and 35558 transitions. [2021-06-12 20:40:57,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:40:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 7916 states and 35558 transitions. [2021-06-12 20:40:57,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:40:57,294 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:57,294 INFO L472 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, 1] [2021-06-12 20:40:57,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:57,494 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:57,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:57,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1607370990, now seen corresponding path program 40 times [2021-06-12 20:40:57,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:57,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456066522] [2021-06-12 20:40:57,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:57,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:57,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456066522] [2021-06-12 20:40:57,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456066522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:57,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082329026] [2021-06-12 20:40:57,631 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 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 [2021-06-12 20:40:57,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:40:57,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:57,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:57,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:57,809 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 [2021-06-12 20:40:57,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:57,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:57,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:57,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:40:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:57,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082329026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:57,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:57,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:40:57,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214174273] [2021-06-12 20:40:57,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:40:57,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:57,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:40:57,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:40:57,852 INFO L87 Difference]: Start difference. First operand 7916 states and 35558 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:40:59,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:59,936 INFO L93 Difference]: Finished difference Result 13019 states and 55469 transitions. [2021-06-12 20:40:59,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 20:40:59,937 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-06-12 20:40:59,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:59,969 INFO L225 Difference]: With dead ends: 13019 [2021-06-12 20:40:59,969 INFO L226 Difference]: Without dead ends: 12581 [2021-06-12 20:40:59,970 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 1332.4ms TimeCoverageRelationStatistics Valid=671, Invalid=2989, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 20:40:59,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12581 states. [2021-06-12 20:41:00,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12581 to 8009. [2021-06-12 20:41:00,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8009 states, 8008 states have (on average 4.493131868131868) internal successors, (35981), 8008 states have internal predecessors, (35981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:00,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8009 states to 8009 states and 35981 transitions. [2021-06-12 20:41:00,187 INFO L78 Accepts]: Start accepts. Automaton has 8009 states and 35981 transitions. Word has length 30 [2021-06-12 20:41:00,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:00,187 INFO L482 AbstractCegarLoop]: Abstraction has 8009 states and 35981 transitions. [2021-06-12 20:41:00,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:41:00,187 INFO L276 IsEmpty]: Start isEmpty. Operand 8009 states and 35981 transitions. [2021-06-12 20:41:00,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:41:00,202 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:00,202 INFO L472 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] [2021-06-12 20:41:00,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable486,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:00,409 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:00,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:00,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1794458804, now seen corresponding path program 41 times [2021-06-12 20:41:00,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:00,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541821644] [2021-06-12 20:41:00,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:00,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:00,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541821644] [2021-06-12 20:41:00,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541821644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:00,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209466706] [2021-06-12 20:41:00,558 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 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 [2021-06-12 20:41:00,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:41:00,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:00,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:00,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:00,773 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 [2021-06-12 20:41:00,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:00,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:00,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:00,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:41:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:00,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209466706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:00,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:00,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:41:00,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629801962] [2021-06-12 20:41:00,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:41:00,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:00,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:41:00,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:41:00,829 INFO L87 Difference]: Start difference. First operand 8009 states and 35981 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:41:03,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:03,326 INFO L93 Difference]: Finished difference Result 12325 states and 52854 transitions. [2021-06-12 20:41:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 20:41:03,326 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 30 [2021-06-12 20:41:03,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:03,357 INFO L225 Difference]: With dead ends: 12325 [2021-06-12 20:41:03,357 INFO L226 Difference]: Without dead ends: 12002 [2021-06-12 20:41:03,358 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 1865.5ms TimeCoverageRelationStatistics Valid=831, Invalid=4281, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 20:41:03,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2021-06-12 20:41:03,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 8130. [2021-06-12 20:41:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8130 states, 8129 states have (on average 4.4908352810923855) internal successors, (36506), 8129 states have internal predecessors, (36506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:03,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8130 states to 8130 states and 36506 transitions. [2021-06-12 20:41:03,595 INFO L78 Accepts]: Start accepts. Automaton has 8130 states and 36506 transitions. Word has length 30 [2021-06-12 20:41:03,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:03,595 INFO L482 AbstractCegarLoop]: Abstraction has 8130 states and 36506 transitions. [2021-06-12 20:41:03,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:41:03,595 INFO L276 IsEmpty]: Start isEmpty. Operand 8130 states and 36506 transitions. [2021-06-12 20:41:03,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:41:03,610 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:03,610 INFO L472 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] [2021-06-12 20:41:03,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-06-12 20:41:03,813 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:03,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:03,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2107985200, now seen corresponding path program 42 times [2021-06-12 20:41:03,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:03,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567471856] [2021-06-12 20:41:03,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:03,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:03,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567471856] [2021-06-12 20:41:03,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567471856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:03,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139197927] [2021-06-12 20:41:03,992 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 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 [2021-06-12 20:41:04,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:41:04,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:04,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:41:04,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:04,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:04,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:04,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:04,155 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 25 treesize of output 53 [2021-06-12 20:41:04,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:04,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:04,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:04,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:47 [2021-06-12 20:41:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:04,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139197927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:04,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:04,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:41:04,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535320808] [2021-06-12 20:41:04,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:41:04,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:04,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:41:04,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:41:04,311 INFO L87 Difference]: Start difference. First operand 8130 states and 36506 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:41:08,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:08,152 INFO L93 Difference]: Finished difference Result 11397 states and 49382 transitions. [2021-06-12 20:41:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 20:41:08,152 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-06-12 20:41:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:08,179 INFO L225 Difference]: With dead ends: 11397 [2021-06-12 20:41:08,179 INFO L226 Difference]: Without dead ends: 11086 [2021-06-12 20:41:08,180 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 2839.3ms TimeCoverageRelationStatistics Valid=1141, Invalid=5339, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 20:41:08,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11086 states. [2021-06-12 20:41:08,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11086 to 8140. [2021-06-12 20:41:08,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8140 states, 8139 states have (on average 4.490477945693574) internal successors, (36548), 8139 states have internal predecessors, (36548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:08,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8140 states to 8140 states and 36548 transitions. [2021-06-12 20:41:08,361 INFO L78 Accepts]: Start accepts. Automaton has 8140 states and 36548 transitions. Word has length 30 [2021-06-12 20:41:08,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:08,361 INFO L482 AbstractCegarLoop]: Abstraction has 8140 states and 36548 transitions. [2021-06-12 20:41:08,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:41:08,361 INFO L276 IsEmpty]: Start isEmpty. Operand 8140 states and 36548 transitions. [2021-06-12 20:41:08,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:41:08,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:08,376 INFO L472 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, 1] [2021-06-12 20:41:08,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-12 20:41:08,576 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:08,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:08,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1327482998, now seen corresponding path program 41 times [2021-06-12 20:41:08,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:08,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278083158] [2021-06-12 20:41:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:08,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:08,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278083158] [2021-06-12 20:41:08,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278083158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:08,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042535025] [2021-06-12 20:41:08,763 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 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 [2021-06-12 20:41:08,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:41:08,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:08,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:08,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:08,919 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 [2021-06-12 20:41:08,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:08,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:08,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:08,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:41:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:08,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042535025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:08,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:08,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:41:08,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167625303] [2021-06-12 20:41:08,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:41:08,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:08,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:41:08,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:41:08,975 INFO L87 Difference]: Start difference. First operand 8140 states and 36548 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:41:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:10,966 INFO L93 Difference]: Finished difference Result 11968 states and 51515 transitions. [2021-06-12 20:41:10,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 20:41:10,966 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 30 [2021-06-12 20:41:10,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:10,993 INFO L225 Difference]: With dead ends: 11968 [2021-06-12 20:41:10,993 INFO L226 Difference]: Without dead ends: 11718 [2021-06-12 20:41:10,994 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1404.1ms TimeCoverageRelationStatistics Valid=655, Invalid=3127, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 20:41:11,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11718 states. [2021-06-12 20:41:11,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11718 to 8201. [2021-06-12 20:41:11,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8201 states, 8200 states have (on average 4.491463414634146) internal successors, (36830), 8200 states have internal predecessors, (36830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:11,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 36830 transitions. [2021-06-12 20:41:11,274 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 36830 transitions. Word has length 30 [2021-06-12 20:41:11,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:11,275 INFO L482 AbstractCegarLoop]: Abstraction has 8201 states and 36830 transitions. [2021-06-12 20:41:11,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:41:11,275 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 36830 transitions. [2021-06-12 20:41:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:41:11,290 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:11,290 INFO L472 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, 1] [2021-06-12 20:41:11,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:11,491 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:11,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:11,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1155280850, now seen corresponding path program 42 times [2021-06-12 20:41:11,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:11,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089056042] [2021-06-12 20:41:11,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:11,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:11,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089056042] [2021-06-12 20:41:11,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089056042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:11,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620501196] [2021-06-12 20:41:11,620 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 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 [2021-06-12 20:41:11,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:41:11,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:11,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:41:11,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:11,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:11,783 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 [2021-06-12 20:41:11,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:11,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:11,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:11,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:41:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:11,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620501196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:11,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:11,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:41:11,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199945647] [2021-06-12 20:41:11,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:41:11,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:11,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:41:11,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:41:11,856 INFO L87 Difference]: Start difference. First operand 8201 states and 36830 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:41:13,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:13,584 INFO L93 Difference]: Finished difference Result 11516 states and 49749 transitions. [2021-06-12 20:41:13,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 20:41:13,585 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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 30 [2021-06-12 20:41:13,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:13,611 INFO L225 Difference]: With dead ends: 11516 [2021-06-12 20:41:13,611 INFO L226 Difference]: Without dead ends: 11423 [2021-06-12 20:41:13,612 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1077.0ms TimeCoverageRelationStatistics Valid=506, Invalid=2574, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 20:41:13,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11423 states. [2021-06-12 20:41:13,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11423 to 8219. [2021-06-12 20:41:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8219 states, 8218 states have (on average 4.488561693842784) internal successors, (36887), 8218 states have internal predecessors, (36887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8219 states to 8219 states and 36887 transitions. [2021-06-12 20:41:13,874 INFO L78 Accepts]: Start accepts. Automaton has 8219 states and 36887 transitions. Word has length 30 [2021-06-12 20:41:13,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:13,874 INFO L482 AbstractCegarLoop]: Abstraction has 8219 states and 36887 transitions. [2021-06-12 20:41:13,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:41:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 8219 states and 36887 transitions. [2021-06-12 20:41:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:41:13,889 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:13,889 INFO L472 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] [2021-06-12 20:41:14,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:14,089 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:14,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:14,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1352757754, now seen corresponding path program 63 times [2021-06-12 20:41:14,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:14,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215234504] [2021-06-12 20:41:14,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:14,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:14,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215234504] [2021-06-12 20:41:14,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215234504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:14,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706178158] [2021-06-12 20:41:14,236 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 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 [2021-06-12 20:41:14,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:41:14,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:14,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:14,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:14,425 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 [2021-06-12 20:41:14,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:14,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:14,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:14,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:41:14,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:14,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706178158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:14,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:14,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:41:14,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709360988] [2021-06-12 20:41:14,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:41:14,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:14,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:41:14,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:41:14,462 INFO L87 Difference]: Start difference. First operand 8219 states and 36887 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-06-12 20:41:16,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:16,222 INFO L93 Difference]: Finished difference Result 10255 states and 44935 transitions. [2021-06-12 20:41:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 20:41:16,222 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 30 [2021-06-12 20:41:16,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:16,246 INFO L225 Difference]: With dead ends: 10255 [2021-06-12 20:41:16,246 INFO L226 Difference]: Without dead ends: 9973 [2021-06-12 20:41:16,246 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1142.5ms TimeCoverageRelationStatistics Valid=530, Invalid=2662, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:41:16,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9973 states. [2021-06-12 20:41:16,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9973 to 8261. [2021-06-12 20:41:16,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8261 states, 8260 states have (on average 4.488498789346247) internal successors, (37075), 8260 states have internal predecessors, (37075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:16,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8261 states to 8261 states and 37075 transitions. [2021-06-12 20:41:16,514 INFO L78 Accepts]: Start accepts. Automaton has 8261 states and 37075 transitions. Word has length 30 [2021-06-12 20:41:16,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:16,514 INFO L482 AbstractCegarLoop]: Abstraction has 8261 states and 37075 transitions. [2021-06-12 20:41:16,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-06-12 20:41:16,514 INFO L276 IsEmpty]: Start isEmpty. Operand 8261 states and 37075 transitions. [2021-06-12 20:41:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:41:16,532 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:16,532 INFO L472 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] [2021-06-12 20:41:16,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-12 20:41:16,732 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:16,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:16,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1637470148, now seen corresponding path program 43 times [2021-06-12 20:41:16,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:16,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367538015] [2021-06-12 20:41:16,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:16,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:16,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367538015] [2021-06-12 20:41:16,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367538015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:16,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107868043] [2021-06-12 20:41:16,941 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 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 [2021-06-12 20:41:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:16,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:16,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:17,136 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 [2021-06-12 20:41:17,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:17,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:17,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:17,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:41:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:17,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107868043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:17,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:17,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:41:17,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887666052] [2021-06-12 20:41:17,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:41:17,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:17,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:41:17,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:41:17,175 INFO L87 Difference]: Start difference. First operand 8261 states and 37075 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:41:19,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:19,831 INFO L93 Difference]: Finished difference Result 9684 states and 42765 transitions. [2021-06-12 20:41:19,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:41:19,831 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 30 [2021-06-12 20:41:19,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:19,854 INFO L225 Difference]: With dead ends: 9684 [2021-06-12 20:41:19,854 INFO L226 Difference]: Without dead ends: 9515 [2021-06-12 20:41:19,854 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1957.9ms TimeCoverageRelationStatistics Valid=535, Invalid=2887, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 20:41:19,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9515 states. [2021-06-12 20:41:19,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9515 to 8275. [2021-06-12 20:41:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8275 states, 8274 states have (on average 4.486705342035291) internal successors, (37123), 8274 states have internal predecessors, (37123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:20,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8275 states to 8275 states and 37123 transitions. [2021-06-12 20:41:20,020 INFO L78 Accepts]: Start accepts. Automaton has 8275 states and 37123 transitions. Word has length 30 [2021-06-12 20:41:20,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:20,020 INFO L482 AbstractCegarLoop]: Abstraction has 8275 states and 37123 transitions. [2021-06-12 20:41:20,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:41:20,020 INFO L276 IsEmpty]: Start isEmpty. Operand 8275 states and 37123 transitions. [2021-06-12 20:41:20,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:41:20,035 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:20,035 INFO L472 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] [2021-06-12 20:41:20,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-12 20:41:20,235 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:20,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:20,235 INFO L82 PathProgramCache]: Analyzing trace with hash 771262022, now seen corresponding path program 64 times [2021-06-12 20:41:20,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:20,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589567154] [2021-06-12 20:41:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:20,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:20,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589567154] [2021-06-12 20:41:20,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589567154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:20,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486370389] [2021-06-12 20:41:20,403 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 [2021-06-12 20:41:20,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:41:20,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:20,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:20,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:20,562 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 [2021-06-12 20:41:20,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:20,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:20,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:20,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:41:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:20,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486370389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:20,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:20,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:41:20,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777932354] [2021-06-12 20:41:20,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:41:20,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:20,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:41:20,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:41:20,621 INFO L87 Difference]: Start difference. First operand 8275 states and 37123 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:41:22,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:22,444 INFO L93 Difference]: Finished difference Result 9994 states and 43966 transitions. [2021-06-12 20:41:22,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:41:22,444 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-06-12 20:41:22,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:22,467 INFO L225 Difference]: With dead ends: 9994 [2021-06-12 20:41:22,468 INFO L226 Difference]: Without dead ends: 9840 [2021-06-12 20:41:22,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1371.0ms TimeCoverageRelationStatistics Valid=454, Invalid=2302, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:41:22,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9840 states. [2021-06-12 20:41:22,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9840 to 8305. [2021-06-12 20:41:22,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8305 states, 8304 states have (on average 4.486873795761079) internal successors, (37259), 8304 states have internal predecessors, (37259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:22,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8305 states to 8305 states and 37259 transitions. [2021-06-12 20:41:22,638 INFO L78 Accepts]: Start accepts. Automaton has 8305 states and 37259 transitions. Word has length 30 [2021-06-12 20:41:22,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:22,638 INFO L482 AbstractCegarLoop]: Abstraction has 8305 states and 37259 transitions. [2021-06-12 20:41:22,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:41:22,638 INFO L276 IsEmpty]: Start isEmpty. Operand 8305 states and 37259 transitions. [2021-06-12 20:41:22,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:41:22,652 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:22,652 INFO L472 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] [2021-06-12 20:41:22,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-12 20:41:22,853 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:22,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:22,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1970933330, now seen corresponding path program 65 times [2021-06-12 20:41:22,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:22,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323238127] [2021-06-12 20:41:22,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:23,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:23,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323238127] [2021-06-12 20:41:23,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323238127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:23,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109609055] [2021-06-12 20:41:23,017 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 [2021-06-12 20:41:23,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:41:23,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:23,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:23,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:23,171 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 [2021-06-12 20:41:23,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:23,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:23,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:23,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:41:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:23,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109609055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:23,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:23,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:41:23,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002009460] [2021-06-12 20:41:23,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:41:23,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:23,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:41:23,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:41:23,228 INFO L87 Difference]: Start difference. First operand 8305 states and 37259 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:41:25,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:25,044 INFO L93 Difference]: Finished difference Result 10235 states and 44794 transitions. [2021-06-12 20:41:25,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 20:41:25,044 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-06-12 20:41:25,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:25,065 INFO L225 Difference]: With dead ends: 10235 [2021-06-12 20:41:25,065 INFO L226 Difference]: Without dead ends: 9941 [2021-06-12 20:41:25,066 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1460.7ms TimeCoverageRelationStatistics Valid=584, Invalid=2722, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 20:41:25,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9941 states. [2021-06-12 20:41:25,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9941 to 8355. [2021-06-12 20:41:25,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8355 states, 8354 states have (on average 4.486114436198228) internal successors, (37477), 8354 states have internal predecessors, (37477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:25,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8355 states to 8355 states and 37477 transitions. [2021-06-12 20:41:25,211 INFO L78 Accepts]: Start accepts. Automaton has 8355 states and 37477 transitions. Word has length 30 [2021-06-12 20:41:25,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:25,212 INFO L482 AbstractCegarLoop]: Abstraction has 8355 states and 37477 transitions. [2021-06-12 20:41:25,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:41:25,212 INFO L276 IsEmpty]: Start isEmpty. Operand 8355 states and 37477 transitions. [2021-06-12 20:41:25,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:41:25,225 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:25,225 INFO L472 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] [2021-06-12 20:41:25,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-12 20:41:25,426 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:25,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:25,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1395227832, now seen corresponding path program 44 times [2021-06-12 20:41:25,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:25,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571608172] [2021-06-12 20:41:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:25,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:25,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571608172] [2021-06-12 20:41:25,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571608172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:25,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230785982] [2021-06-12 20:41:25,614 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 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 [2021-06-12 20:41:25,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:41:25,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:25,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:41:25,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:25,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:25,794 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 [2021-06-12 20:41:25,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:25,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:25,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:25,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:41:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:25,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230785982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:25,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:25,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:41:25,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547594358] [2021-06-12 20:41:25,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:41:25,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:25,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:41:25,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:41:25,907 INFO L87 Difference]: Start difference. First operand 8355 states and 37477 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:41:28,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:28,143 INFO L93 Difference]: Finished difference Result 9648 states and 42451 transitions. [2021-06-12 20:41:28,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:41:28,143 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:41:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:28,165 INFO L225 Difference]: With dead ends: 9648 [2021-06-12 20:41:28,165 INFO L226 Difference]: Without dead ends: 9397 [2021-06-12 20:41:28,165 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1785.2ms TimeCoverageRelationStatistics Valid=482, Invalid=2940, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 20:41:28,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9397 states. [2021-06-12 20:41:28,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9397 to 8369. [2021-06-12 20:41:28,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8369 states, 8368 states have (on average 4.484464627151052) internal successors, (37526), 8368 states have internal predecessors, (37526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8369 states to 8369 states and 37526 transitions. [2021-06-12 20:41:28,330 INFO L78 Accepts]: Start accepts. Automaton has 8369 states and 37526 transitions. Word has length 30 [2021-06-12 20:41:28,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:28,330 INFO L482 AbstractCegarLoop]: Abstraction has 8369 states and 37526 transitions. [2021-06-12 20:41:28,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:41:28,331 INFO L276 IsEmpty]: Start isEmpty. Operand 8369 states and 37526 transitions. [2021-06-12 20:41:28,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:41:28,345 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:28,345 INFO L472 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] [2021-06-12 20:41:28,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2021-06-12 20:41:28,546 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:28,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:28,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1504152388, now seen corresponding path program 45 times [2021-06-12 20:41:28,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:28,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693218797] [2021-06-12 20:41:28,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:28,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:28,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693218797] [2021-06-12 20:41:28,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693218797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:28,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184866243] [2021-06-12 20:41:28,738 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 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 [2021-06-12 20:41:28,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:41:28,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:28,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:41:28,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:28,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:28,917 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 [2021-06-12 20:41:28,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:28,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:28,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:28,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:41:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:29,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184866243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:29,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:29,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:41:29,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980510893] [2021-06-12 20:41:29,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:41:29,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:29,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:41:29,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:41:29,032 INFO L87 Difference]: Start difference. First operand 8369 states and 37526 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:41:31,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:31,145 INFO L93 Difference]: Finished difference Result 9780 states and 43000 transitions. [2021-06-12 20:41:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:41:31,146 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:41:31,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:31,168 INFO L225 Difference]: With dead ends: 9780 [2021-06-12 20:41:31,168 INFO L226 Difference]: Without dead ends: 9489 [2021-06-12 20:41:31,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1726.9ms TimeCoverageRelationStatistics Valid=545, Invalid=2877, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 20:41:31,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9489 states. [2021-06-12 20:41:31,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9489 to 8357. [2021-06-12 20:41:31,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8357 states, 8356 states have (on average 4.485998085208234) internal successors, (37485), 8356 states have internal predecessors, (37485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:31,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8357 states to 8357 states and 37485 transitions. [2021-06-12 20:41:31,332 INFO L78 Accepts]: Start accepts. Automaton has 8357 states and 37485 transitions. Word has length 30 [2021-06-12 20:41:31,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:31,332 INFO L482 AbstractCegarLoop]: Abstraction has 8357 states and 37485 transitions. [2021-06-12 20:41:31,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:41:31,332 INFO L276 IsEmpty]: Start isEmpty. Operand 8357 states and 37485 transitions. [2021-06-12 20:41:31,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:41:31,347 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:31,347 INFO L472 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] [2021-06-12 20:41:31,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:31,549 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:31,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:31,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1111003758, now seen corresponding path program 66 times [2021-06-12 20:41:31,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:31,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824023221] [2021-06-12 20:41:31,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:31,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:31,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824023221] [2021-06-12 20:41:31,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824023221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:31,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921605227] [2021-06-12 20:41:31,725 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 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 [2021-06-12 20:41:31,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:41:31,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:31,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:41:31,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:31,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:31,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:31,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:31,990 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 22 treesize of output 48 [2021-06-12 20:41:31,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:32,025 INFO L628 ElimStorePlain]: treesize reduction 33, result has 50.0 percent of original size [2021-06-12 20:41:32,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:32,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:27 [2021-06-12 20:41:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:32,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921605227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:32,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:32,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:41:32,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757650497] [2021-06-12 20:41:32,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:41:32,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:32,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:41:32,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:41:32,113 INFO L87 Difference]: Start difference. First operand 8357 states and 37485 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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) [2021-06-12 20:41:35,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:35,015 INFO L93 Difference]: Finished difference Result 10902 states and 47264 transitions. [2021-06-12 20:41:35,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 20:41:35,015 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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 30 [2021-06-12 20:41:35,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:35,036 INFO L225 Difference]: With dead ends: 10902 [2021-06-12 20:41:35,037 INFO L226 Difference]: Without dead ends: 10543 [2021-06-12 20:41:35,037 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 2110.3ms TimeCoverageRelationStatistics Valid=655, Invalid=4037, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 20:41:35,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10543 states. [2021-06-12 20:41:35,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10543 to 8395. [2021-06-12 20:41:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8395 states, 8394 states have (on average 4.484751012628068) internal successors, (37645), 8394 states have internal predecessors, (37645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:35,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8395 states to 8395 states and 37645 transitions. [2021-06-12 20:41:35,204 INFO L78 Accepts]: Start accepts. Automaton has 8395 states and 37645 transitions. Word has length 30 [2021-06-12 20:41:35,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:35,204 INFO L482 AbstractCegarLoop]: Abstraction has 8395 states and 37645 transitions. [2021-06-12 20:41:35,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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) [2021-06-12 20:41:35,204 INFO L276 IsEmpty]: Start isEmpty. Operand 8395 states and 37645 transitions. [2021-06-12 20:41:35,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:41:35,220 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:35,220 INFO L472 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] [2021-06-12 20:41:35,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:35,421 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:35,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:35,421 INFO L82 PathProgramCache]: Analyzing trace with hash 193735636, now seen corresponding path program 46 times [2021-06-12 20:41:35,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:35,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744406038] [2021-06-12 20:41:35,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:35,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:35,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744406038] [2021-06-12 20:41:35,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744406038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:35,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746034066] [2021-06-12 20:41:35,618 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 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 [2021-06-12 20:41:35,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:41:35,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:35,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:35,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:35,816 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 [2021-06-12 20:41:35,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:35,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:35,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:35,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:41:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:35,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746034066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:35,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:35,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:41:35,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297784129] [2021-06-12 20:41:35,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:41:35,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:35,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:41:35,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:41:35,857 INFO L87 Difference]: Start difference. First operand 8395 states and 37645 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:41:38,158 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-12 20:41:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:38,655 INFO L93 Difference]: Finished difference Result 10029 states and 44121 transitions. [2021-06-12 20:41:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 20:41:38,656 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 30 [2021-06-12 20:41:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:38,682 INFO L225 Difference]: With dead ends: 10029 [2021-06-12 20:41:38,682 INFO L226 Difference]: Without dead ends: 9864 [2021-06-12 20:41:38,682 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 1941.8ms TimeCoverageRelationStatistics Valid=506, Invalid=3034, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:41:38,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9864 states. [2021-06-12 20:41:38,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9864 to 8451. [2021-06-12 20:41:38,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8451 states, 8450 states have (on average 4.47585798816568) internal successors, (37821), 8450 states have internal predecessors, (37821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:38,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8451 states to 8451 states and 37821 transitions. [2021-06-12 20:41:38,854 INFO L78 Accepts]: Start accepts. Automaton has 8451 states and 37821 transitions. Word has length 30 [2021-06-12 20:41:38,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:38,854 INFO L482 AbstractCegarLoop]: Abstraction has 8451 states and 37821 transitions. [2021-06-12 20:41:38,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:41:38,854 INFO L276 IsEmpty]: Start isEmpty. Operand 8451 states and 37821 transitions. [2021-06-12 20:41:38,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:41:38,869 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:38,870 INFO L472 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] [2021-06-12 20:41:39,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-06-12 20:41:39,073 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:39,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:39,073 INFO L82 PathProgramCache]: Analyzing trace with hash -264609798, now seen corresponding path program 47 times [2021-06-12 20:41:39,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:39,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058466608] [2021-06-12 20:41:39,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:39,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:39,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058466608] [2021-06-12 20:41:39,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058466608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:39,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564760915] [2021-06-12 20:41:39,250 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 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 [2021-06-12 20:41:39,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:41:39,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:39,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:39,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:39,429 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 [2021-06-12 20:41:39,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:39,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:39,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:39,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-12 20:41:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:39,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564760915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:39,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:39,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:41:39,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661743706] [2021-06-12 20:41:39,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:41:39,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:39,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:41:39,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:41:39,512 INFO L87 Difference]: Start difference. First operand 8451 states and 37821 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:41:41,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:41,906 INFO L93 Difference]: Finished difference Result 9890 states and 43610 transitions. [2021-06-12 20:41:41,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 20:41:41,906 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 30 [2021-06-12 20:41:41,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:41,929 INFO L225 Difference]: With dead ends: 9890 [2021-06-12 20:41:41,929 INFO L226 Difference]: Without dead ends: 9757 [2021-06-12 20:41:41,929 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1769.8ms TimeCoverageRelationStatistics Valid=475, Invalid=2387, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:41:41,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2021-06-12 20:41:42,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 8461. [2021-06-12 20:41:42,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8461 states, 8460 states have (on average 4.474113475177305) internal successors, (37851), 8460 states have internal predecessors, (37851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8461 states to 8461 states and 37851 transitions. [2021-06-12 20:41:42,095 INFO L78 Accepts]: Start accepts. Automaton has 8461 states and 37851 transitions. Word has length 30 [2021-06-12 20:41:42,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:42,096 INFO L482 AbstractCegarLoop]: Abstraction has 8461 states and 37851 transitions. [2021-06-12 20:41:42,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:41:42,096 INFO L276 IsEmpty]: Start isEmpty. Operand 8461 states and 37851 transitions. [2021-06-12 20:41:42,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:41:42,110 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:42,111 INFO L472 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] [2021-06-12 20:41:42,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:42,311 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:42,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:42,311 INFO L82 PathProgramCache]: Analyzing trace with hash -770956064, now seen corresponding path program 48 times [2021-06-12 20:41:42,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:42,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108576941] [2021-06-12 20:41:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:42,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:42,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108576941] [2021-06-12 20:41:42,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108576941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:42,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485358912] [2021-06-12 20:41:42,540 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 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 [2021-06-12 20:41:42,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:41:42,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:42,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:42,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:42,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:42,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:42,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:42,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 40 [2021-06-12 20:41:42,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:41:42,809 INFO L628 ElimStorePlain]: treesize reduction 33, result has 45.9 percent of original size [2021-06-12 20:41:42,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:42,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:22 [2021-06-12 20:41:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:42,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485358912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:42,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:42,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:41:42,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432600949] [2021-06-12 20:41:42,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:41:42,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:42,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:41:42,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:41:42,928 INFO L87 Difference]: Start difference. First operand 8461 states and 37851 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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) [2021-06-12 20:41:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:45,373 INFO L93 Difference]: Finished difference Result 9871 states and 43272 transitions. [2021-06-12 20:41:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:41:45,373 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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 30 [2021-06-12 20:41:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:45,395 INFO L225 Difference]: With dead ends: 9871 [2021-06-12 20:41:45,395 INFO L226 Difference]: Without dead ends: 9647 [2021-06-12 20:41:45,395 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 1713.3ms TimeCoverageRelationStatistics Valid=426, Invalid=2654, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 20:41:45,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9647 states. [2021-06-12 20:41:45,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9647 to 8447. [2021-06-12 20:41:45,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8447 states, 8446 states have (on average 4.4770305470044995) internal successors, (37813), 8446 states have internal predecessors, (37813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:45,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8447 states to 8447 states and 37813 transitions. [2021-06-12 20:41:45,560 INFO L78 Accepts]: Start accepts. Automaton has 8447 states and 37813 transitions. Word has length 30 [2021-06-12 20:41:45,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:45,560 INFO L482 AbstractCegarLoop]: Abstraction has 8447 states and 37813 transitions. [2021-06-12 20:41:45,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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) [2021-06-12 20:41:45,561 INFO L276 IsEmpty]: Start isEmpty. Operand 8447 states and 37813 transitions. [2021-06-12 20:41:45,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:41:45,576 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:45,576 INFO L472 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] [2021-06-12 20:41:45,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:45,789 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:45,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:45,789 INFO L82 PathProgramCache]: Analyzing trace with hash 173899368, now seen corresponding path program 49 times [2021-06-12 20:41:45,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:45,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756966926] [2021-06-12 20:41:45,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:45,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:45,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756966926] [2021-06-12 20:41:45,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756966926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:45,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830622189] [2021-06-12 20:41:45,973 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 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 [2021-06-12 20:41:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:46,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:46,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:46,121 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 [2021-06-12 20:41:46,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:46,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:46,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:46,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:41:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:46,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830622189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:46,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:46,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:41:46,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3351886] [2021-06-12 20:41:46,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:41:46,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:46,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:41:46,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:41:46,194 INFO L87 Difference]: Start difference. First operand 8447 states and 37813 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:41:48,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:48,239 INFO L93 Difference]: Finished difference Result 9694 states and 42844 transitions. [2021-06-12 20:41:48,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 20:41:48,240 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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 30 [2021-06-12 20:41:48,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:48,263 INFO L225 Difference]: With dead ends: 9694 [2021-06-12 20:41:48,263 INFO L226 Difference]: Without dead ends: 9580 [2021-06-12 20:41:48,264 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 1667.0ms TimeCoverageRelationStatistics Valid=464, Invalid=2506, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:41:48,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9580 states. [2021-06-12 20:41:48,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9580 to 8461. [2021-06-12 20:41:48,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8461 states, 8460 states have (on average 4.4763593380614655) internal successors, (37870), 8460 states have internal predecessors, (37870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:48,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8461 states to 8461 states and 37870 transitions. [2021-06-12 20:41:48,476 INFO L78 Accepts]: Start accepts. Automaton has 8461 states and 37870 transitions. Word has length 30 [2021-06-12 20:41:48,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:48,476 INFO L482 AbstractCegarLoop]: Abstraction has 8461 states and 37870 transitions. [2021-06-12 20:41:48,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:41:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 8461 states and 37870 transitions. [2021-06-12 20:41:48,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:41:48,490 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:48,490 INFO L472 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] [2021-06-12 20:41:48,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2021-06-12 20:41:48,693 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:48,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:48,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1221687708, now seen corresponding path program 50 times [2021-06-12 20:41:48,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:48,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134252812] [2021-06-12 20:41:48,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:48,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:48,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134252812] [2021-06-12 20:41:48,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134252812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:48,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321389798] [2021-06-12 20:41:48,873 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 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 [2021-06-12 20:41:48,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:41:48,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:48,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:41:48,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:49,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:49,034 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 [2021-06-12 20:41:49,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:49,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:49,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:49,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:41:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:49,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321389798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:49,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:49,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:41:49,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53656748] [2021-06-12 20:41:49,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:41:49,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:49,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:41:49,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:41:49,178 INFO L87 Difference]: Start difference. First operand 8461 states and 37870 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:41:51,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:51,491 INFO L93 Difference]: Finished difference Result 9865 states and 43320 transitions. [2021-06-12 20:41:51,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 20:41:51,492 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:41:51,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:51,517 INFO L225 Difference]: With dead ends: 9865 [2021-06-12 20:41:51,517 INFO L226 Difference]: Without dead ends: 9569 [2021-06-12 20:41:51,517 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1852.4ms TimeCoverageRelationStatistics Valid=555, Invalid=2985, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:41:51,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9569 states. [2021-06-12 20:41:51,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9569 to 8464. [2021-06-12 20:41:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8464 states, 8463 states have (on average 4.475599669148056) internal successors, (37877), 8463 states have internal predecessors, (37877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:51,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8464 states to 8464 states and 37877 transitions. [2021-06-12 20:41:51,746 INFO L78 Accepts]: Start accepts. Automaton has 8464 states and 37877 transitions. Word has length 30 [2021-06-12 20:41:51,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:51,746 INFO L482 AbstractCegarLoop]: Abstraction has 8464 states and 37877 transitions. [2021-06-12 20:41:51,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:41:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 8464 states and 37877 transitions. [2021-06-12 20:41:51,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:41:51,762 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:51,762 INFO L472 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] [2021-06-12 20:41:51,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:51,965 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:51,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:51,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1585391294, now seen corresponding path program 51 times [2021-06-12 20:41:51,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:51,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678614882] [2021-06-12 20:41:51,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:52,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:52,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678614882] [2021-06-12 20:41:52,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678614882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:52,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851686080] [2021-06-12 20:41:52,129 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 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 [2021-06-12 20:41:52,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:41:52,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:52,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:41:52,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:52,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:52,292 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 [2021-06-12 20:41:52,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:52,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:52,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:52,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:41:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:52,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851686080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:52,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:52,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:41:52,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059352261] [2021-06-12 20:41:52,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:41:52,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:52,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:41:52,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:41:52,439 INFO L87 Difference]: Start difference. First operand 8464 states and 37877 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:41:54,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:54,775 INFO L93 Difference]: Finished difference Result 9781 states and 42947 transitions. [2021-06-12 20:41:54,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 20:41:54,775 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:41:54,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:54,798 INFO L225 Difference]: With dead ends: 9781 [2021-06-12 20:41:54,798 INFO L226 Difference]: Without dead ends: 9533 [2021-06-12 20:41:54,799 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 1794.6ms TimeCoverageRelationStatistics Valid=512, Invalid=3148, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 20:41:54,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9533 states. [2021-06-12 20:41:54,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9533 to 8475. [2021-06-12 20:41:54,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8475 states, 8474 states have (on average 4.474274250649044) internal successors, (37915), 8474 states have internal predecessors, (37915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:55,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8475 states to 8475 states and 37915 transitions. [2021-06-12 20:41:55,017 INFO L78 Accepts]: Start accepts. Automaton has 8475 states and 37915 transitions. Word has length 30 [2021-06-12 20:41:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:55,017 INFO L482 AbstractCegarLoop]: Abstraction has 8475 states and 37915 transitions. [2021-06-12 20:41:55,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:41:55,017 INFO L276 IsEmpty]: Start isEmpty. Operand 8475 states and 37915 transitions. [2021-06-12 20:41:55,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:41:55,032 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:55,032 INFO L472 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] [2021-06-12 20:41:55,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-12 20:41:55,233 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:55,233 INFO L82 PathProgramCache]: Analyzing trace with hash -2118148276, now seen corresponding path program 52 times [2021-06-12 20:41:55,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:55,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92984991] [2021-06-12 20:41:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:55,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:55,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92984991] [2021-06-12 20:41:55,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92984991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:55,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804650743] [2021-06-12 20:41:55,374 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 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 [2021-06-12 20:41:55,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:41:55,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:55,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:55,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:55,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-12 20:41:55,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:55,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:55,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:55,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:41:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:55,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804650743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:55,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:55,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:41:55,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893973204] [2021-06-12 20:41:55,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:41:55,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:55,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:41:55,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:41:55,614 INFO L87 Difference]: Start difference. First operand 8475 states and 37915 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:41:57,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:57,476 INFO L93 Difference]: Finished difference Result 9720 states and 42895 transitions. [2021-06-12 20:41:57,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 20:41:57,476 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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 30 [2021-06-12 20:41:57,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:57,500 INFO L225 Difference]: With dead ends: 9720 [2021-06-12 20:41:57,500 INFO L226 Difference]: Without dead ends: 9609 [2021-06-12 20:41:57,500 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 1436.0ms TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:41:57,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9609 states. [2021-06-12 20:41:57,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9609 to 8497. [2021-06-12 20:41:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8497 states, 8496 states have (on average 4.472222222222222) internal successors, (37996), 8496 states have internal predecessors, (37996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:57,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8497 states to 8497 states and 37996 transitions. [2021-06-12 20:41:57,666 INFO L78 Accepts]: Start accepts. Automaton has 8497 states and 37996 transitions. Word has length 30 [2021-06-12 20:41:57,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:57,666 INFO L482 AbstractCegarLoop]: Abstraction has 8497 states and 37996 transitions. [2021-06-12 20:41:57,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:41:57,666 INFO L276 IsEmpty]: Start isEmpty. Operand 8497 states and 37996 transitions. [2021-06-12 20:41:57,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:41:57,681 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:57,681 INFO L472 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] [2021-06-12 20:41:57,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:57,882 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:41:57,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:57,882 INFO L82 PathProgramCache]: Analyzing trace with hash 331084236, now seen corresponding path program 53 times [2021-06-12 20:41:57,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:57,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683103040] [2021-06-12 20:41:57,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:58,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:58,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683103040] [2021-06-12 20:41:58,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683103040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:58,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669863866] [2021-06-12 20:41:58,046 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 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 [2021-06-12 20:41:58,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:41:58,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:58,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:41:58,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:58,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:58,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:58,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:58,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 20:41:58,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:58,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:58,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:58,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:236 [2021-06-12 20:41:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:58,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669863866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:58,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:58,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:41:58,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656909732] [2021-06-12 20:41:58,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:41:58,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:58,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:41:58,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:41:58,512 INFO L87 Difference]: Start difference. First operand 8497 states and 37996 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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) [2021-06-12 20:42:00,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:00,274 INFO L93 Difference]: Finished difference Result 9754 states and 42857 transitions. [2021-06-12 20:42:00,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:42:00,274 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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 30 [2021-06-12 20:42:00,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:00,296 INFO L225 Difference]: With dead ends: 9754 [2021-06-12 20:42:00,296 INFO L226 Difference]: Without dead ends: 9513 [2021-06-12 20:42:00,296 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1496.7ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:42:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9513 states. [2021-06-12 20:42:00,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9513 to 8497. [2021-06-12 20:42:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8497 states, 8496 states have (on average 4.472222222222222) internal successors, (37996), 8496 states have internal predecessors, (37996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:00,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8497 states to 8497 states and 37996 transitions. [2021-06-12 20:42:00,465 INFO L78 Accepts]: Start accepts. Automaton has 8497 states and 37996 transitions. Word has length 30 [2021-06-12 20:42:00,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:00,465 INFO L482 AbstractCegarLoop]: Abstraction has 8497 states and 37996 transitions. [2021-06-12 20:42:00,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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) [2021-06-12 20:42:00,465 INFO L276 IsEmpty]: Start isEmpty. Operand 8497 states and 37996 transitions. [2021-06-12 20:42:00,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:00,480 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:00,480 INFO L472 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] [2021-06-12 20:42:00,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-12 20:42:00,680 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:00,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:00,680 INFO L82 PathProgramCache]: Analyzing trace with hash 2075448242, now seen corresponding path program 54 times [2021-06-12 20:42:00,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:00,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876045161] [2021-06-12 20:42:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:00,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:00,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876045161] [2021-06-12 20:42:00,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876045161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:00,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034506750] [2021-06-12 20:42:00,870 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 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 [2021-06-12 20:42:00,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:42:00,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:00,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:42:00,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:01,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:01,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:01,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:01,060 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 25 treesize of output 53 [2021-06-12 20:42:01,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:01,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:01,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:01,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-06-12 20:42:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:01,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034506750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:01,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:01,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:42:01,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244831809] [2021-06-12 20:42:01,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:42:01,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:01,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:42:01,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:42:01,274 INFO L87 Difference]: Start difference. First operand 8497 states and 37996 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:42:03,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:03,788 INFO L93 Difference]: Finished difference Result 9984 states and 43777 transitions. [2021-06-12 20:42:03,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:42:03,789 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-06-12 20:42:03,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:03,810 INFO L225 Difference]: With dead ends: 9984 [2021-06-12 20:42:03,810 INFO L226 Difference]: Without dead ends: 9774 [2021-06-12 20:42:03,811 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1921.6ms TimeCoverageRelationStatistics Valid=597, Invalid=2595, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:42:03,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9774 states. [2021-06-12 20:42:03,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9774 to 8494. [2021-06-12 20:42:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8494 states, 8493 states have (on average 4.473095490403862) internal successors, (37990), 8493 states have internal predecessors, (37990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:03,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8494 states to 8494 states and 37990 transitions. [2021-06-12 20:42:03,987 INFO L78 Accepts]: Start accepts. Automaton has 8494 states and 37990 transitions. Word has length 30 [2021-06-12 20:42:03,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:03,987 INFO L482 AbstractCegarLoop]: Abstraction has 8494 states and 37990 transitions. [2021-06-12 20:42:03,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:42:03,987 INFO L276 IsEmpty]: Start isEmpty. Operand 8494 states and 37990 transitions. [2021-06-12 20:42:04,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:04,001 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:04,002 INFO L472 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] [2021-06-12 20:42:04,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:04,202 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:04,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:04,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1269358978, now seen corresponding path program 12 times [2021-06-12 20:42:04,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:04,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790169201] [2021-06-12 20:42:04,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:04,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:04,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:04,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790169201] [2021-06-12 20:42:04,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790169201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:04,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489311517] [2021-06-12 20:42:04,354 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 [2021-06-12 20:42:04,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:42:04,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:04,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:04,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:04,520 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 [2021-06-12 20:42:04,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:04,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:04,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:04,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:42:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:04,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489311517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:04,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:04,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:42:04,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512198937] [2021-06-12 20:42:04,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:42:04,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:04,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:42:04,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:42:04,575 INFO L87 Difference]: Start difference. First operand 8494 states and 37990 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:42:06,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:06,551 INFO L93 Difference]: Finished difference Result 9846 states and 43390 transitions. [2021-06-12 20:42:06,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:42:06,552 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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 30 [2021-06-12 20:42:06,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:06,573 INFO L225 Difference]: With dead ends: 9846 [2021-06-12 20:42:06,573 INFO L226 Difference]: Without dead ends: 9728 [2021-06-12 20:42:06,574 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1445.5ms TimeCoverageRelationStatistics Valid=488, Invalid=2482, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:42:06,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9728 states. [2021-06-12 20:42:06,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9728 to 8526. [2021-06-12 20:42:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8526 states, 8525 states have (on average 4.472023460410557) internal successors, (38124), 8525 states have internal predecessors, (38124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8526 states to 8526 states and 38124 transitions. [2021-06-12 20:42:06,738 INFO L78 Accepts]: Start accepts. Automaton has 8526 states and 38124 transitions. Word has length 30 [2021-06-12 20:42:06,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:06,738 INFO L482 AbstractCegarLoop]: Abstraction has 8526 states and 38124 transitions. [2021-06-12 20:42:06,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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) [2021-06-12 20:42:06,738 INFO L276 IsEmpty]: Start isEmpty. Operand 8526 states and 38124 transitions. [2021-06-12 20:42:06,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:06,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:06,753 INFO L472 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] [2021-06-12 20:42:06,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable539 [2021-06-12 20:42:06,954 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:06,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:06,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1989792446, now seen corresponding path program 13 times [2021-06-12 20:42:06,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:06,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788756752] [2021-06-12 20:42:06,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:07,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:07,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788756752] [2021-06-12 20:42:07,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788756752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:07,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723099730] [2021-06-12 20:42:07,109 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 [2021-06-12 20:42:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:07,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:07,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:07,271 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 [2021-06-12 20:42:07,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:07,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:07,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:07,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:42:07,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:07,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723099730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:07,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:07,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:42:07,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759037959] [2021-06-12 20:42:07,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:42:07,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:07,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:42:07,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:42:07,329 INFO L87 Difference]: Start difference. First operand 8526 states and 38124 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:42:09,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:09,410 INFO L93 Difference]: Finished difference Result 10067 states and 44278 transitions. [2021-06-12 20:42:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 20:42:09,410 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-06-12 20:42:09,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:09,434 INFO L225 Difference]: With dead ends: 10067 [2021-06-12 20:42:09,434 INFO L226 Difference]: Without dead ends: 9923 [2021-06-12 20:42:09,435 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1668.9ms TimeCoverageRelationStatistics Valid=721, Invalid=3439, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 20:42:09,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9923 states. [2021-06-12 20:42:09,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9923 to 8514. [2021-06-12 20:42:09,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8514 states, 8513 states have (on average 4.47198402443322) internal successors, (38070), 8513 states have internal predecessors, (38070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:09,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8514 states to 8514 states and 38070 transitions. [2021-06-12 20:42:09,610 INFO L78 Accepts]: Start accepts. Automaton has 8514 states and 38070 transitions. Word has length 30 [2021-06-12 20:42:09,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:09,610 INFO L482 AbstractCegarLoop]: Abstraction has 8514 states and 38070 transitions. [2021-06-12 20:42:09,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-06-12 20:42:09,610 INFO L276 IsEmpty]: Start isEmpty. Operand 8514 states and 38070 transitions. [2021-06-12 20:42:09,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:09,625 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:09,625 INFO L472 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] [2021-06-12 20:42:09,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-06-12 20:42:09,825 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:09,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:09,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1107069828, now seen corresponding path program 14 times [2021-06-12 20:42:09,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:09,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158766798] [2021-06-12 20:42:09,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:09,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:09,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158766798] [2021-06-12 20:42:09,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158766798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:09,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369880780] [2021-06-12 20:42:09,999 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 [2021-06-12 20:42:10,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:42:10,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:10,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:42:10,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:10,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:10,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:42:10,243 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 [2021-06-12 20:42:10,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:10,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:10,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:10,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:42:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:10,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369880780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:10,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:10,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:42:10,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071079773] [2021-06-12 20:42:10,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:42:10,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:10,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:42:10,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:42:10,302 INFO L87 Difference]: Start difference. First operand 8514 states and 38070 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2021-06-12 20:42:12,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:12,639 INFO L93 Difference]: Finished difference Result 9972 states and 43829 transitions. [2021-06-12 20:42:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 20:42:12,640 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 30 [2021-06-12 20:42:12,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:12,662 INFO L225 Difference]: With dead ends: 9972 [2021-06-12 20:42:12,662 INFO L226 Difference]: Without dead ends: 9778 [2021-06-12 20:42:12,663 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 1662.3ms TimeCoverageRelationStatistics Valid=589, Invalid=3071, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 20:42:12,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9778 states. [2021-06-12 20:42:12,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9778 to 8514. [2021-06-12 20:42:12,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8514 states, 8513 states have (on average 4.47198402443322) internal successors, (38070), 8513 states have internal predecessors, (38070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:12,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8514 states to 8514 states and 38070 transitions. [2021-06-12 20:42:12,829 INFO L78 Accepts]: Start accepts. Automaton has 8514 states and 38070 transitions. Word has length 30 [2021-06-12 20:42:12,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:12,829 INFO L482 AbstractCegarLoop]: Abstraction has 8514 states and 38070 transitions. [2021-06-12 20:42:12,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2021-06-12 20:42:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand 8514 states and 38070 transitions. [2021-06-12 20:42:12,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:12,843 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:12,843 INFO L472 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, 1] [2021-06-12 20:42:13,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-12 20:42:13,044 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:13,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:13,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1883158074, now seen corresponding path program 43 times [2021-06-12 20:42:13,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:13,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410022766] [2021-06-12 20:42:13,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:13,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:13,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410022766] [2021-06-12 20:42:13,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410022766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:13,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516361337] [2021-06-12 20:42:13,216 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 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 [2021-06-12 20:42:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:13,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:13,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:13,412 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 [2021-06-12 20:42:13,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:13,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:13,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:13,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:42:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:13,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516361337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:13,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:13,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:42:13,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194289747] [2021-06-12 20:42:13,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:13,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:13,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:13,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:13,452 INFO L87 Difference]: Start difference. First operand 8514 states and 38070 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:42:15,136 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-12 20:42:16,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:16,163 INFO L93 Difference]: Finished difference Result 9829 states and 43367 transitions. [2021-06-12 20:42:16,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 20:42:16,164 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 30 [2021-06-12 20:42:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:16,185 INFO L225 Difference]: With dead ends: 9829 [2021-06-12 20:42:16,185 INFO L226 Difference]: Without dead ends: 9684 [2021-06-12 20:42:16,186 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 1958.0ms TimeCoverageRelationStatistics Valid=617, Invalid=3165, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 20:42:16,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9684 states. [2021-06-12 20:42:16,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9684 to 8514. [2021-06-12 20:42:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8514 states, 8513 states have (on average 4.471044285210854) internal successors, (38062), 8513 states have internal predecessors, (38062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:16,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8514 states to 8514 states and 38062 transitions. [2021-06-12 20:42:16,349 INFO L78 Accepts]: Start accepts. Automaton has 8514 states and 38062 transitions. Word has length 30 [2021-06-12 20:42:16,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:16,349 INFO L482 AbstractCegarLoop]: Abstraction has 8514 states and 38062 transitions. [2021-06-12 20:42:16,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:42:16,349 INFO L276 IsEmpty]: Start isEmpty. Operand 8514 states and 38062 transitions. [2021-06-12 20:42:16,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:16,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:16,364 INFO L472 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, 1] [2021-06-12 20:42:16,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-12 20:42:16,564 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:16,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:16,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1066082048, now seen corresponding path program 44 times [2021-06-12 20:42:16,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:16,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69398933] [2021-06-12 20:42:16,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:16,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:16,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69398933] [2021-06-12 20:42:16,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69398933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:16,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775733867] [2021-06-12 20:42:16,697 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 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 [2021-06-12 20:42:16,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:42:16,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:16,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:16,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:16,867 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 [2021-06-12 20:42:16,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:16,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:16,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:16,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:42:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:16,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775733867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:16,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:16,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:42:16,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292071617] [2021-06-12 20:42:16,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:42:16,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:16,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:42:16,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:42:16,924 INFO L87 Difference]: Start difference. First operand 8514 states and 38062 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:42:19,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:19,369 INFO L93 Difference]: Finished difference Result 9560 states and 42268 transitions. [2021-06-12 20:42:19,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:42:19,370 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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 30 [2021-06-12 20:42:19,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:19,392 INFO L225 Difference]: With dead ends: 9560 [2021-06-12 20:42:19,392 INFO L226 Difference]: Without dead ends: 9462 [2021-06-12 20:42:19,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1841.7ms TimeCoverageRelationStatistics Valid=497, Invalid=2583, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 20:42:19,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9462 states. [2021-06-12 20:42:19,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9462 to 8520. [2021-06-12 20:42:19,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8520 states, 8519 states have (on average 4.470947294283366) internal successors, (38088), 8519 states have internal predecessors, (38088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8520 states to 8520 states and 38088 transitions. [2021-06-12 20:42:19,560 INFO L78 Accepts]: Start accepts. Automaton has 8520 states and 38088 transitions. Word has length 30 [2021-06-12 20:42:19,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:19,560 INFO L482 AbstractCegarLoop]: Abstraction has 8520 states and 38088 transitions. [2021-06-12 20:42:19,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:42:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 8520 states and 38088 transitions. [2021-06-12 20:42:19,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:19,575 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:19,575 INFO L472 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, 1] [2021-06-12 20:42:19,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-12 20:42:19,776 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:19,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:19,776 INFO L82 PathProgramCache]: Analyzing trace with hash 744071900, now seen corresponding path program 45 times [2021-06-12 20:42:19,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:19,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036093850] [2021-06-12 20:42:19,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:19,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:19,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036093850] [2021-06-12 20:42:19,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036093850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:19,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370886658] [2021-06-12 20:42:19,910 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 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 [2021-06-12 20:42:19,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:42:19,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:19,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:19,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:20,081 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 [2021-06-12 20:42:20,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:20,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:20,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:20,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:42:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:20,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370886658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:20,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:20,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:42:20,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20680217] [2021-06-12 20:42:20,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:42:20,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:20,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:42:20,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:42:20,121 INFO L87 Difference]: Start difference. First operand 8520 states and 38088 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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) [2021-06-12 20:42:22,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:22,023 INFO L93 Difference]: Finished difference Result 9476 states and 41964 transitions. [2021-06-12 20:42:22,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:42:22,024 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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 30 [2021-06-12 20:42:22,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:22,046 INFO L225 Difference]: With dead ends: 9476 [2021-06-12 20:42:22,046 INFO L226 Difference]: Without dead ends: 9365 [2021-06-12 20:42:22,047 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1448.6ms TimeCoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:42:22,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9365 states. [2021-06-12 20:42:22,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9365 to 8504. [2021-06-12 20:42:22,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8504 states, 8503 states have (on average 4.472068681641773) internal successors, (38026), 8503 states have internal predecessors, (38026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:22,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8504 states to 8504 states and 38026 transitions. [2021-06-12 20:42:22,212 INFO L78 Accepts]: Start accepts. Automaton has 8504 states and 38026 transitions. Word has length 30 [2021-06-12 20:42:22,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:22,212 INFO L482 AbstractCegarLoop]: Abstraction has 8504 states and 38026 transitions. [2021-06-12 20:42:22,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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) [2021-06-12 20:42:22,213 INFO L276 IsEmpty]: Start isEmpty. Operand 8504 states and 38026 transitions. [2021-06-12 20:42:22,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:22,227 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:22,228 INFO L472 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] [2021-06-12 20:42:22,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:22,428 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:22,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1029023822, now seen corresponding path program 15 times [2021-06-12 20:42:22,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:22,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080908370] [2021-06-12 20:42:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:22,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:22,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080908370] [2021-06-12 20:42:22,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080908370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:22,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167762802] [2021-06-12 20:42:22,597 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 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 [2021-06-12 20:42:22,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:42:22,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:22,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:42:22,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:22,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:22,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:42:22,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-12 20:42:22,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:22,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:22,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:22,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:42:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:22,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167762802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:22,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:22,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:42:22,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926927533] [2021-06-12 20:42:22,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:42:22,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:22,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:42:22,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:42:22,892 INFO L87 Difference]: Start difference. First operand 8504 states and 38026 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2021-06-12 20:42:24,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:24,670 INFO L93 Difference]: Finished difference Result 9975 states and 43793 transitions. [2021-06-12 20:42:24,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 20:42:24,670 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 30 [2021-06-12 20:42:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:24,692 INFO L225 Difference]: With dead ends: 9975 [2021-06-12 20:42:24,692 INFO L226 Difference]: Without dead ends: 9781 [2021-06-12 20:42:24,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 1392.7ms TimeCoverageRelationStatistics Valid=472, Invalid=2608, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 20:42:24,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9781 states. [2021-06-12 20:42:24,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9781 to 8504. [2021-06-12 20:42:24,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8504 states, 8503 states have (on average 4.472068681641773) internal successors, (38026), 8503 states have internal predecessors, (38026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:24,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8504 states to 8504 states and 38026 transitions. [2021-06-12 20:42:24,934 INFO L78 Accepts]: Start accepts. Automaton has 8504 states and 38026 transitions. Word has length 30 [2021-06-12 20:42:24,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:24,934 INFO L482 AbstractCegarLoop]: Abstraction has 8504 states and 38026 transitions. [2021-06-12 20:42:24,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2021-06-12 20:42:24,934 INFO L276 IsEmpty]: Start isEmpty. Operand 8504 states and 38026 transitions. [2021-06-12 20:42:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:24,949 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:24,949 INFO L472 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, 1] [2021-06-12 20:42:25,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-12 20:42:25,150 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:25,150 INFO L82 PathProgramCache]: Analyzing trace with hash 275715572, now seen corresponding path program 46 times [2021-06-12 20:42:25,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:25,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788134410] [2021-06-12 20:42:25,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:25,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:25,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788134410] [2021-06-12 20:42:25,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788134410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:25,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335127423] [2021-06-12 20:42:25,302 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 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 [2021-06-12 20:42:25,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:42:25,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:25,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:25,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:25,509 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 [2021-06-12 20:42:25,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:25,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:25,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:25,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:42:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:25,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335127423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:25,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:25,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:42:25,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626846622] [2021-06-12 20:42:25,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:25,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:25,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:25,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:25,550 INFO L87 Difference]: Start difference. First operand 8504 states and 38026 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:42:27,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:27,891 INFO L93 Difference]: Finished difference Result 9940 states and 43735 transitions. [2021-06-12 20:42:27,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:42:27,891 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 30 [2021-06-12 20:42:27,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:27,913 INFO L225 Difference]: With dead ends: 9940 [2021-06-12 20:42:27,913 INFO L226 Difference]: Without dead ends: 9775 [2021-06-12 20:42:27,914 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1671.4ms TimeCoverageRelationStatistics Valid=456, Invalid=2736, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:42:27,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9775 states. [2021-06-12 20:42:28,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9775 to 8520. [2021-06-12 20:42:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8520 states, 8519 states have (on average 4.469069139570372) internal successors, (38072), 8519 states have internal predecessors, (38072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:28,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8520 states to 8520 states and 38072 transitions. [2021-06-12 20:42:28,081 INFO L78 Accepts]: Start accepts. Automaton has 8520 states and 38072 transitions. Word has length 30 [2021-06-12 20:42:28,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:28,081 INFO L482 AbstractCegarLoop]: Abstraction has 8520 states and 38072 transitions. [2021-06-12 20:42:28,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:42:28,081 INFO L276 IsEmpty]: Start isEmpty. Operand 8520 states and 38072 transitions. [2021-06-12 20:42:28,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:28,096 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:28,096 INFO L472 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, 1] [2021-06-12 20:42:28,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:28,297 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:28,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:28,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1151526326, now seen corresponding path program 47 times [2021-06-12 20:42:28,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:28,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524497904] [2021-06-12 20:42:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:28,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:28,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524497904] [2021-06-12 20:42:28,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524497904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:28,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260384027] [2021-06-12 20:42:28,526 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 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 [2021-06-12 20:42:28,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:42:28,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:28,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:28,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:28,714 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 [2021-06-12 20:42:28,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:28,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:28,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:28,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-12 20:42:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:28,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260384027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:28,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:28,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:42:28,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880574360] [2021-06-12 20:42:28,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:28,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:28,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:28,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:28,775 INFO L87 Difference]: Start difference. First operand 8520 states and 38072 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:42:30,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:30,761 INFO L93 Difference]: Finished difference Result 9814 states and 43273 transitions. [2021-06-12 20:42:30,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:42:30,761 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 30 [2021-06-12 20:42:30,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:30,783 INFO L225 Difference]: With dead ends: 9814 [2021-06-12 20:42:30,783 INFO L226 Difference]: Without dead ends: 9705 [2021-06-12 20:42:30,784 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1477.9ms TimeCoverageRelationStatistics Valid=398, Invalid=2052, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:42:30,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9705 states. [2021-06-12 20:42:30,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9705 to 8520. [2021-06-12 20:42:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8520 states, 8519 states have (on average 4.469069139570372) internal successors, (38072), 8519 states have internal predecessors, (38072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:30,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8520 states to 8520 states and 38072 transitions. [2021-06-12 20:42:30,946 INFO L78 Accepts]: Start accepts. Automaton has 8520 states and 38072 transitions. Word has length 30 [2021-06-12 20:42:30,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:30,946 INFO L482 AbstractCegarLoop]: Abstraction has 8520 states and 38072 transitions. [2021-06-12 20:42:30,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-06-12 20:42:30,947 INFO L276 IsEmpty]: Start isEmpty. Operand 8520 states and 38072 transitions. [2021-06-12 20:42:30,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:30,961 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:30,961 INFO L472 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, 1] [2021-06-12 20:42:31,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-06-12 20:42:31,163 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:31,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:31,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1657872592, now seen corresponding path program 48 times [2021-06-12 20:42:31,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:31,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558024288] [2021-06-12 20:42:31,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:31,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:31,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558024288] [2021-06-12 20:42:31,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558024288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:31,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664795202] [2021-06-12 20:42:31,313 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 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 [2021-06-12 20:42:31,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:42:31,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:31,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:42:31,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:31,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:31,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:42:31,543 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 [2021-06-12 20:42:31,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:31,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:31,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:31,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:9 [2021-06-12 20:42:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:31,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664795202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:31,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:31,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:42:31,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294752530] [2021-06-12 20:42:31,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:42:31,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:31,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:42:31,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:42:31,606 INFO L87 Difference]: Start difference. First operand 8520 states and 38072 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-06-12 20:42:33,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:33,699 INFO L93 Difference]: Finished difference Result 9787 states and 43113 transitions. [2021-06-12 20:42:33,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 20:42:33,699 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 30 [2021-06-12 20:42:33,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:33,721 INFO L225 Difference]: With dead ends: 9787 [2021-06-12 20:42:33,721 INFO L226 Difference]: Without dead ends: 9645 [2021-06-12 20:42:33,722 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 1664.3ms TimeCoverageRelationStatistics Valid=528, Invalid=2778, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 20:42:33,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9645 states. [2021-06-12 20:42:33,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9645 to 8506. [2021-06-12 20:42:33,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8506 states, 8505 states have (on average 4.471017048794827) internal successors, (38026), 8505 states have internal predecessors, (38026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:33,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8506 states to 8506 states and 38026 transitions. [2021-06-12 20:42:33,885 INFO L78 Accepts]: Start accepts. Automaton has 8506 states and 38026 transitions. Word has length 30 [2021-06-12 20:42:33,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:33,885 INFO L482 AbstractCegarLoop]: Abstraction has 8506 states and 38026 transitions. [2021-06-12 20:42:33,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-06-12 20:42:33,886 INFO L276 IsEmpty]: Start isEmpty. Operand 8506 states and 38026 transitions. [2021-06-12 20:42:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:33,903 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:33,903 INFO L472 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, 1] [2021-06-12 20:42:34,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:34,104 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:34,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:34,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1108317834, now seen corresponding path program 49 times [2021-06-12 20:42:34,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:34,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930376933] [2021-06-12 20:42:34,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:34,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:34,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930376933] [2021-06-12 20:42:34,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930376933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:34,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208190189] [2021-06-12 20:42:34,254 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 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 [2021-06-12 20:42:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:34,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:34,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:34,431 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 [2021-06-12 20:42:34,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:34,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:34,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:34,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:42:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:34,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208190189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:34,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:34,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:42:34,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98744950] [2021-06-12 20:42:34,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:42:34,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:34,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:42:34,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:42:34,505 INFO L87 Difference]: Start difference. First operand 8506 states and 38026 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:42:36,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:36,187 INFO L93 Difference]: Finished difference Result 9482 states and 41976 transitions. [2021-06-12 20:42:36,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:42:36,187 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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 30 [2021-06-12 20:42:36,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:36,208 INFO L225 Difference]: With dead ends: 9482 [2021-06-12 20:42:36,208 INFO L226 Difference]: Without dead ends: 9384 [2021-06-12 20:42:36,209 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1308.3ms TimeCoverageRelationStatistics Valid=292, Invalid=1348, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:42:36,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9384 states. [2021-06-12 20:42:36,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9384 to 8518. [2021-06-12 20:42:36,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8518 states, 8517 states have (on average 4.470823059762827) internal successors, (38078), 8517 states have internal predecessors, (38078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:36,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8518 states to 8518 states and 38078 transitions. [2021-06-12 20:42:36,372 INFO L78 Accepts]: Start accepts. Automaton has 8518 states and 38078 transitions. Word has length 30 [2021-06-12 20:42:36,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:36,372 INFO L482 AbstractCegarLoop]: Abstraction has 8518 states and 38078 transitions. [2021-06-12 20:42:36,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:42:36,373 INFO L276 IsEmpty]: Start isEmpty. Operand 8518 states and 38078 transitions. [2021-06-12 20:42:36,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:36,387 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:36,387 INFO L472 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, 1] [2021-06-12 20:42:36,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-06-12 20:42:36,588 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:36,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:36,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1376495514, now seen corresponding path program 50 times [2021-06-12 20:42:36,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:36,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626901664] [2021-06-12 20:42:36,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:36,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:36,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626901664] [2021-06-12 20:42:36,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626901664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:36,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387721405] [2021-06-12 20:42:36,714 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 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 [2021-06-12 20:42:36,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:42:36,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:36,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:36,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:36,866 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 [2021-06-12 20:42:36,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:36,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:36,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:36,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:42:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:36,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387721405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:36,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:36,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:42:36,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099745791] [2021-06-12 20:42:36,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:42:36,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:36,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:42:36,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:42:36,925 INFO L87 Difference]: Start difference. First operand 8518 states and 38078 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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) [2021-06-12 20:42:38,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:38,315 INFO L93 Difference]: Finished difference Result 9459 states and 41899 transitions. [2021-06-12 20:42:38,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:42:38,316 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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 30 [2021-06-12 20:42:38,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:38,336 INFO L225 Difference]: With dead ends: 9459 [2021-06-12 20:42:38,337 INFO L226 Difference]: Without dead ends: 9356 [2021-06-12 20:42:38,337 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1002.1ms TimeCoverageRelationStatistics Valid=256, Invalid=1150, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:42:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9356 states. [2021-06-12 20:42:38,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9356 to 8512. [2021-06-12 20:42:38,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8512 states, 8511 states have (on average 4.470684995887675) internal successors, (38050), 8511 states have internal predecessors, (38050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8512 states to 8512 states and 38050 transitions. [2021-06-12 20:42:38,564 INFO L78 Accepts]: Start accepts. Automaton has 8512 states and 38050 transitions. Word has length 30 [2021-06-12 20:42:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:38,565 INFO L482 AbstractCegarLoop]: Abstraction has 8512 states and 38050 transitions. [2021-06-12 20:42:38,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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) [2021-06-12 20:42:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 8512 states and 38050 transitions. [2021-06-12 20:42:38,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:38,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:38,588 INFO L472 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, 1] [2021-06-12 20:42:38,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:38,811 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:38,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:38,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1442285456, now seen corresponding path program 51 times [2021-06-12 20:42:38,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:38,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214207671] [2021-06-12 20:42:38,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:38,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:38,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214207671] [2021-06-12 20:42:38,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214207671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:38,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730398203] [2021-06-12 20:42:38,977 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 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 [2021-06-12 20:42:39,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:42:39,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:39,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:39,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:39,155 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 [2021-06-12 20:42:39,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:39,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:39,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:39,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:42:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:39,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730398203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:39,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:39,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:42:39,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538102765] [2021-06-12 20:42:39,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:42:39,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:39,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:42:39,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:42:39,230 INFO L87 Difference]: Start difference. First operand 8512 states and 38050 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:42:40,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:40,998 INFO L93 Difference]: Finished difference Result 9506 states and 42062 transitions. [2021-06-12 20:42:40,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:42:40,998 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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 30 [2021-06-12 20:42:40,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:41,019 INFO L225 Difference]: With dead ends: 9506 [2021-06-12 20:42:41,019 INFO L226 Difference]: Without dead ends: 9408 [2021-06-12 20:42:41,019 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1297.8ms TimeCoverageRelationStatistics Valid=343, Invalid=1637, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:42:41,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9408 states. [2021-06-12 20:42:41,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9408 to 8518. [2021-06-12 20:42:41,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8518 states, 8517 states have (on average 4.470588235294118) internal successors, (38076), 8517 states have internal predecessors, (38076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:41,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8518 states to 8518 states and 38076 transitions. [2021-06-12 20:42:41,180 INFO L78 Accepts]: Start accepts. Automaton has 8518 states and 38076 transitions. Word has length 30 [2021-06-12 20:42:41,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:41,180 INFO L482 AbstractCegarLoop]: Abstraction has 8518 states and 38076 transitions. [2021-06-12 20:42:41,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:42:41,180 INFO L276 IsEmpty]: Start isEmpty. Operand 8518 states and 38076 transitions. [2021-06-12 20:42:41,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:41,203 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:41,203 INFO L472 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, 1] [2021-06-12 20:42:41,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-12 20:42:41,425 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:41,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:41,425 INFO L82 PathProgramCache]: Analyzing trace with hash -821801390, now seen corresponding path program 52 times [2021-06-12 20:42:41,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:41,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673387419] [2021-06-12 20:42:41,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:41,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:41,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673387419] [2021-06-12 20:42:41,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673387419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:41,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629085131] [2021-06-12 20:42:41,554 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 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 [2021-06-12 20:42:41,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:42:41,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:41,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:41,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:41,707 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 21 treesize of output 13 [2021-06-12 20:42:41,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:41,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:41,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:41,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:42:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:41,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629085131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:41,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:41,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:42:41,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142254403] [2021-06-12 20:42:41,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:42:41,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:41,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:42:41,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:42:41,860 INFO L87 Difference]: Start difference. First operand 8518 states and 38076 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:42:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:43,207 INFO L93 Difference]: Finished difference Result 9492 states and 42015 transitions. [2021-06-12 20:42:43,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:42:43,207 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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 30 [2021-06-12 20:42:43,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:43,228 INFO L225 Difference]: With dead ends: 9492 [2021-06-12 20:42:43,229 INFO L226 Difference]: Without dead ends: 9400 [2021-06-12 20:42:43,229 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1032.6ms TimeCoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:42:43,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9400 states. [2021-06-12 20:42:43,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9400 to 8515. [2021-06-12 20:42:43,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8515 states, 8514 states have (on average 4.470519144937749) internal successors, (38062), 8514 states have internal predecessors, (38062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:43,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8515 states to 8515 states and 38062 transitions. [2021-06-12 20:42:43,390 INFO L78 Accepts]: Start accepts. Automaton has 8515 states and 38062 transitions. Word has length 30 [2021-06-12 20:42:43,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:43,390 INFO L482 AbstractCegarLoop]: Abstraction has 8515 states and 38062 transitions. [2021-06-12 20:42:43,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:42:43,390 INFO L276 IsEmpty]: Start isEmpty. Operand 8515 states and 38062 transitions. [2021-06-12 20:42:43,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:43,405 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:43,405 INFO L472 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, 1] [2021-06-12 20:42:43,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:43,605 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:43,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:43,605 INFO L82 PathProgramCache]: Analyzing trace with hash -50538734, now seen corresponding path program 53 times [2021-06-12 20:42:43,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:43,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063244672] [2021-06-12 20:42:43,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:43,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:43,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063244672] [2021-06-12 20:42:43,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063244672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:43,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512972712] [2021-06-12 20:42:43,758 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 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 [2021-06-12 20:42:43,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:42:43,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:43,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:43,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:43,908 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 [2021-06-12 20:42:43,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:43,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:43,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:43,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:42:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:43,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512972712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:43,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:43,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:42:43,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562712505] [2021-06-12 20:42:43,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:42:43,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:43,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:42:43,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:42:43,987 INFO L87 Difference]: Start difference. First operand 8515 states and 38062 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:42:45,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:45,786 INFO L93 Difference]: Finished difference Result 9632 states and 42585 transitions. [2021-06-12 20:42:45,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:42:45,787 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-06-12 20:42:45,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:45,807 INFO L225 Difference]: With dead ends: 9632 [2021-06-12 20:42:45,808 INFO L226 Difference]: Without dead ends: 9523 [2021-06-12 20:42:45,808 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1316.2ms TimeCoverageRelationStatistics Valid=343, Invalid=1463, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:42:45,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9523 states. [2021-06-12 20:42:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9523 to 8515. [2021-06-12 20:42:45,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8515 states, 8514 states have (on average 4.470519144937749) internal successors, (38062), 8514 states have internal predecessors, (38062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8515 states to 8515 states and 38062 transitions. [2021-06-12 20:42:45,965 INFO L78 Accepts]: Start accepts. Automaton has 8515 states and 38062 transitions. Word has length 30 [2021-06-12 20:42:45,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:45,965 INFO L482 AbstractCegarLoop]: Abstraction has 8515 states and 38062 transitions. [2021-06-12 20:42:45,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:42:45,965 INFO L276 IsEmpty]: Start isEmpty. Operand 8515 states and 38062 transitions. [2021-06-12 20:42:45,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:45,980 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:45,980 INFO L472 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, 1] [2021-06-12 20:42:46,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-06-12 20:42:46,180 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:46,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:46,181 INFO L82 PathProgramCache]: Analyzing trace with hash -687005588, now seen corresponding path program 54 times [2021-06-12 20:42:46,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:46,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328209325] [2021-06-12 20:42:46,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:46,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:46,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328209325] [2021-06-12 20:42:46,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328209325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:46,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063270744] [2021-06-12 20:42:46,314 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 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 [2021-06-12 20:42:46,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:42:46,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:46,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:42:46,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:46,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:46,471 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 [2021-06-12 20:42:46,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:46,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:46,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:46,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:42:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:46,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063270744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:46,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:46,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:42:46,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27369536] [2021-06-12 20:42:46,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:46,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:46,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:46,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:46,609 INFO L87 Difference]: Start difference. First operand 8515 states and 38062 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:42:48,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:48,895 INFO L93 Difference]: Finished difference Result 9801 states and 43004 transitions. [2021-06-12 20:42:48,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 20:42:48,895 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:42:48,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:48,917 INFO L225 Difference]: With dead ends: 9801 [2021-06-12 20:42:48,917 INFO L226 Difference]: Without dead ends: 9518 [2021-06-12 20:42:48,917 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1696.5ms TimeCoverageRelationStatistics Valid=541, Invalid=2651, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:42:48,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9518 states. [2021-06-12 20:42:49,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9518 to 8509. [2021-06-12 20:42:49,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8509 states, 8508 states have (on average 4.471673718852845) internal successors, (38045), 8508 states have internal predecessors, (38045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8509 states to 8509 states and 38045 transitions. [2021-06-12 20:42:49,079 INFO L78 Accepts]: Start accepts. Automaton has 8509 states and 38045 transitions. Word has length 30 [2021-06-12 20:42:49,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:49,080 INFO L482 AbstractCegarLoop]: Abstraction has 8509 states and 38045 transitions. [2021-06-12 20:42:49,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:42:49,080 INFO L276 IsEmpty]: Start isEmpty. Operand 8509 states and 38045 transitions. [2021-06-12 20:42:49,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:49,094 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:49,094 INFO L472 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] [2021-06-12 20:42:49,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-12 20:42:49,297 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:49,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:49,297 INFO L82 PathProgramCache]: Analyzing trace with hash 106058870, now seen corresponding path program 55 times [2021-06-12 20:42:49,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:49,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836170330] [2021-06-12 20:42:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:49,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:49,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836170330] [2021-06-12 20:42:49,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836170330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:49,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402443823] [2021-06-12 20:42:49,470 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 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 [2021-06-12 20:42:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:49,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:49,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:49,644 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 [2021-06-12 20:42:49,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:49,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:49,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:49,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:42:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:49,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402443823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:49,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:49,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:42:49,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868998480] [2021-06-12 20:42:49,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:42:49,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:49,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:42:49,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:42:49,682 INFO L87 Difference]: Start difference. First operand 8509 states and 38045 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:42:52,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:52,391 INFO L93 Difference]: Finished difference Result 13334 states and 56795 transitions. [2021-06-12 20:42:52,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 20:42:52,391 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 30 [2021-06-12 20:42:52,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:52,422 INFO L225 Difference]: With dead ends: 13334 [2021-06-12 20:42:52,422 INFO L226 Difference]: Without dead ends: 13100 [2021-06-12 20:42:52,423 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 1800.4ms TimeCoverageRelationStatistics Valid=596, Invalid=3564, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 20:42:52,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13100 states. [2021-06-12 20:42:52,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13100 to 8714. [2021-06-12 20:42:52,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8714 states, 8713 states have (on average 4.47779180534833) internal successors, (39015), 8713 states have internal predecessors, (39015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:52,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8714 states to 8714 states and 39015 transitions. [2021-06-12 20:42:52,637 INFO L78 Accepts]: Start accepts. Automaton has 8714 states and 39015 transitions. Word has length 30 [2021-06-12 20:42:52,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:52,637 INFO L482 AbstractCegarLoop]: Abstraction has 8714 states and 39015 transitions. [2021-06-12 20:42:52,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:42:52,637 INFO L276 IsEmpty]: Start isEmpty. Operand 8714 states and 39015 transitions. [2021-06-12 20:42:52,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:52,652 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:52,652 INFO L472 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, 1] [2021-06-12 20:42:52,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:52,852 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:52,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:52,852 INFO L82 PathProgramCache]: Analyzing trace with hash -604240288, now seen corresponding path program 55 times [2021-06-12 20:42:52,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:52,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554802972] [2021-06-12 20:42:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:52,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:52,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554802972] [2021-06-12 20:42:52,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554802972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:52,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835849842] [2021-06-12 20:42:52,983 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 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 [2021-06-12 20:42:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:53,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:53,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:53,157 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 [2021-06-12 20:42:53,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:53,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:53,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:53,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:42:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:53,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835849842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:53,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:53,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:42:53,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015762808] [2021-06-12 20:42:53,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:42:53,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:53,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:42:53,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:42:53,195 INFO L87 Difference]: Start difference. First operand 8714 states and 39015 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:42:56,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:56,468 INFO L93 Difference]: Finished difference Result 13805 states and 58727 transitions. [2021-06-12 20:42:56,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 20:42:56,469 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 30 [2021-06-12 20:42:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:56,501 INFO L225 Difference]: With dead ends: 13805 [2021-06-12 20:42:56,501 INFO L226 Difference]: Without dead ends: 13601 [2021-06-12 20:42:56,501 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 1820.2ms TimeCoverageRelationStatistics Valid=736, Invalid=4234, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 20:42:56,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13601 states. [2021-06-12 20:42:56,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13601 to 8797. [2021-06-12 20:42:56,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8797 states, 8796 states have (on average 4.482150977717144) internal successors, (39425), 8796 states have internal predecessors, (39425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:56,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8797 states to 8797 states and 39425 transitions. [2021-06-12 20:42:56,725 INFO L78 Accepts]: Start accepts. Automaton has 8797 states and 39425 transitions. Word has length 30 [2021-06-12 20:42:56,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:56,725 INFO L482 AbstractCegarLoop]: Abstraction has 8797 states and 39425 transitions. [2021-06-12 20:42:56,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:42:56,725 INFO L276 IsEmpty]: Start isEmpty. Operand 8797 states and 39425 transitions. [2021-06-12 20:42:56,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:42:56,740 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:56,740 INFO L472 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] [2021-06-12 20:42:56,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-06-12 20:42:56,941 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:42:56,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:56,941 INFO L82 PathProgramCache]: Analyzing trace with hash -869082702, now seen corresponding path program 56 times [2021-06-12 20:42:56,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:56,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320741574] [2021-06-12 20:42:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:57,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:57,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320741574] [2021-06-12 20:42:57,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320741574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:57,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214718890] [2021-06-12 20:42:57,088 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 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 [2021-06-12 20:42:57,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:42:57,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:57,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:42:57,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:57,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:57,255 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 [2021-06-12 20:42:57,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:57,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:57,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:57,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:42:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:57,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214718890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:57,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:57,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:42:57,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471078025] [2021-06-12 20:42:57,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:57,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:57,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:57,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:57,371 INFO L87 Difference]: Start difference. First operand 8797 states and 39425 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-06-12 20:43:01,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:01,046 INFO L93 Difference]: Finished difference Result 13188 states and 56197 transitions. [2021-06-12 20:43:01,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 20:43:01,046 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 30 [2021-06-12 20:43:01,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:01,076 INFO L225 Difference]: With dead ends: 13188 [2021-06-12 20:43:01,076 INFO L226 Difference]: Without dead ends: 12652 [2021-06-12 20:43:01,076 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2253 ImplicationChecksByTransitivity, 2632.0ms TimeCoverageRelationStatistics Valid=937, Invalid=5705, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 20:43:01,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12652 states. [2021-06-12 20:43:01,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12652 to 8830. [2021-06-12 20:43:01,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8830 states, 8829 states have (on average 4.483180428134556) internal successors, (39582), 8829 states have internal predecessors, (39582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8830 states to 8830 states and 39582 transitions. [2021-06-12 20:43:01,293 INFO L78 Accepts]: Start accepts. Automaton has 8830 states and 39582 transitions. Word has length 30 [2021-06-12 20:43:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:01,293 INFO L482 AbstractCegarLoop]: Abstraction has 8830 states and 39582 transitions. [2021-06-12 20:43:01,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-06-12 20:43:01,293 INFO L276 IsEmpty]: Start isEmpty. Operand 8830 states and 39582 transitions. [2021-06-12 20:43:01,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:43:01,309 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:01,309 INFO L472 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] [2021-06-12 20:43:01,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable558,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:01,510 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:01,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:01,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1182609098, now seen corresponding path program 57 times [2021-06-12 20:43:01,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:01,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808789931] [2021-06-12 20:43:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:01,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:01,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808789931] [2021-06-12 20:43:01,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808789931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:01,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261282538] [2021-06-12 20:43:01,695 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 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 [2021-06-12 20:43:01,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:43:01,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:01,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:43:01,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:01,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:01,922 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 [2021-06-12 20:43:01,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:01,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:01,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:01,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:43:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:02,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261282538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:02,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:02,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:43:02,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401368329] [2021-06-12 20:43:02,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:43:02,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:02,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:43:02,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:43:02,037 INFO L87 Difference]: Start difference. First operand 8830 states and 39582 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-06-12 20:43:05,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:05,500 INFO L93 Difference]: Finished difference Result 13465 states and 58176 transitions. [2021-06-12 20:43:05,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 20:43:05,500 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 30 [2021-06-12 20:43:05,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:05,530 INFO L225 Difference]: With dead ends: 13465 [2021-06-12 20:43:05,530 INFO L226 Difference]: Without dead ends: 13094 [2021-06-12 20:43:05,531 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 2739.2ms TimeCoverageRelationStatistics Valid=1048, Invalid=5594, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 20:43:05,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13094 states. [2021-06-12 20:43:05,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13094 to 8864. [2021-06-12 20:43:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.479860092519463) internal successors, (39705), 8863 states have internal predecessors, (39705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 39705 transitions. [2021-06-12 20:43:05,729 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 39705 transitions. Word has length 30 [2021-06-12 20:43:05,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:05,729 INFO L482 AbstractCegarLoop]: Abstraction has 8864 states and 39705 transitions. [2021-06-12 20:43:05,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-06-12 20:43:05,729 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 39705 transitions. [2021-06-12 20:43:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:43:05,744 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:05,744 INFO L472 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, 1] [2021-06-12 20:43:05,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:05,945 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:05,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:05,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2042108196, now seen corresponding path program 56 times [2021-06-12 20:43:05,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:05,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096330618] [2021-06-12 20:43:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:06,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:06,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096330618] [2021-06-12 20:43:06,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096330618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:06,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114959487] [2021-06-12 20:43:06,072 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 [2021-06-12 20:43:06,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:43:06,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:06,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:43:06,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:06,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:06,241 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 [2021-06-12 20:43:06,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:06,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:06,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:06,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:43:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:06,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114959487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:06,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:06,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:43:06,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124559162] [2021-06-12 20:43:06,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:43:06,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:06,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:43:06,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:43:06,341 INFO L87 Difference]: Start difference. First operand 8864 states and 39705 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2021-06-12 20:43:09,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:09,487 INFO L93 Difference]: Finished difference Result 12619 states and 54304 transitions. [2021-06-12 20:43:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 20:43:09,488 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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 30 [2021-06-12 20:43:09,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:09,517 INFO L225 Difference]: With dead ends: 12619 [2021-06-12 20:43:09,517 INFO L226 Difference]: Without dead ends: 12324 [2021-06-12 20:43:09,518 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 2168.3ms TimeCoverageRelationStatistics Valid=792, Invalid=4464, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 20:43:09,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12324 states. [2021-06-12 20:43:09,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12324 to 8900. [2021-06-12 20:43:09,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8900 states, 8899 states have (on average 4.481065288234633) internal successors, (39877), 8899 states have internal predecessors, (39877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:09,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8900 states to 8900 states and 39877 transitions. [2021-06-12 20:43:09,734 INFO L78 Accepts]: Start accepts. Automaton has 8900 states and 39877 transitions. Word has length 30 [2021-06-12 20:43:09,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:09,734 INFO L482 AbstractCegarLoop]: Abstraction has 8900 states and 39877 transitions. [2021-06-12 20:43:09,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2021-06-12 20:43:09,734 INFO L276 IsEmpty]: Start isEmpty. Operand 8900 states and 39877 transitions. [2021-06-12 20:43:09,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:43:09,749 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:09,750 INFO L472 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, 1] [2021-06-12 20:43:09,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-12 20:43:09,950 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:09,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:09,950 INFO L82 PathProgramCache]: Analyzing trace with hash -207054482, now seen corresponding path program 57 times [2021-06-12 20:43:09,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:09,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385857859] [2021-06-12 20:43:09,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:10,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:10,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385857859] [2021-06-12 20:43:10,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385857859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:10,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955387000] [2021-06-12 20:43:10,077 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 [2021-06-12 20:43:10,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:43:10,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:10,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:43:10,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:10,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:10,247 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 [2021-06-12 20:43:10,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:10,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:10,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:10,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:43:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:10,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955387000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:10,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:10,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:43:10,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169909329] [2021-06-12 20:43:10,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:43:10,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:10,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:43:10,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:43:10,363 INFO L87 Difference]: Start difference. First operand 8900 states and 39877 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-06-12 20:43:13,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:13,998 INFO L93 Difference]: Finished difference Result 12183 states and 53001 transitions. [2021-06-12 20:43:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-12 20:43:13,999 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 30 [2021-06-12 20:43:13,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:14,025 INFO L225 Difference]: With dead ends: 12183 [2021-06-12 20:43:14,025 INFO L226 Difference]: Without dead ends: 11928 [2021-06-12 20:43:14,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 2756.4ms TimeCoverageRelationStatistics Valid=1123, Invalid=5519, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 20:43:14,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11928 states. [2021-06-12 20:43:14,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11928 to 8897. [2021-06-12 20:43:14,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8897 states, 8896 states have (on average 4.482014388489208) internal successors, (39872), 8896 states have internal predecessors, (39872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:14,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8897 states to 8897 states and 39872 transitions. [2021-06-12 20:43:14,231 INFO L78 Accepts]: Start accepts. Automaton has 8897 states and 39872 transitions. Word has length 30 [2021-06-12 20:43:14,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:14,231 INFO L482 AbstractCegarLoop]: Abstraction has 8897 states and 39872 transitions. [2021-06-12 20:43:14,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-06-12 20:43:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 8897 states and 39872 transitions. [2021-06-12 20:43:14,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:43:14,246 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:14,246 INFO L472 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, 1] [2021-06-12 20:43:14,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:14,447 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:14,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:14,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2080656952, now seen corresponding path program 58 times [2021-06-12 20:43:14,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:14,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818860371] [2021-06-12 20:43:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:14,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:14,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818860371] [2021-06-12 20:43:14,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818860371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:14,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830317119] [2021-06-12 20:43:14,572 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 [2021-06-12 20:43:14,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:43:14,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:14,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:14,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:14,728 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 [2021-06-12 20:43:14,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:14,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:14,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:14,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:43:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:14,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830317119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:14,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:14,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:43:14,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606772668] [2021-06-12 20:43:14,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:43:14,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:14,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:43:14,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:43:14,770 INFO L87 Difference]: Start difference. First operand 8897 states and 39872 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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) [2021-06-12 20:43:16,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:16,615 INFO L93 Difference]: Finished difference Result 12525 states and 54126 transitions. [2021-06-12 20:43:16,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:43:16,615 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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 30 [2021-06-12 20:43:16,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:16,645 INFO L225 Difference]: With dead ends: 12525 [2021-06-12 20:43:16,646 INFO L226 Difference]: Without dead ends: 12364 [2021-06-12 20:43:16,646 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1201.6ms TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:43:16,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12364 states. [2021-06-12 20:43:16,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12364 to 8895. [2021-06-12 20:43:16,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8895 states, 8894 states have (on average 4.481110861254779) internal successors, (39855), 8894 states have internal predecessors, (39855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8895 states to 8895 states and 39855 transitions. [2021-06-12 20:43:16,865 INFO L78 Accepts]: Start accepts. Automaton has 8895 states and 39855 transitions. Word has length 30 [2021-06-12 20:43:16,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:16,865 INFO L482 AbstractCegarLoop]: Abstraction has 8895 states and 39855 transitions. [2021-06-12 20:43:16,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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) [2021-06-12 20:43:16,865 INFO L276 IsEmpty]: Start isEmpty. Operand 8895 states and 39855 transitions. [2021-06-12 20:43:16,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:43:16,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:16,880 INFO L472 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] [2021-06-12 20:43:17,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-12 20:43:17,081 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:17,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1644847312, now seen corresponding path program 58 times [2021-06-12 20:43:17,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:17,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403105157] [2021-06-12 20:43:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:17,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:17,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403105157] [2021-06-12 20:43:17,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403105157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:17,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133606602] [2021-06-12 20:43:17,244 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 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 [2021-06-12 20:43:17,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:43:17,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:17,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:17,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:17,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-12 20:43:17,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:17,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:17,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:17,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:43:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:17,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133606602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:17,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:17,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:43:17,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078661353] [2021-06-12 20:43:17,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:43:17,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:17,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:43:17,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:43:17,461 INFO L87 Difference]: Start difference. First operand 8895 states and 39855 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:43:20,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:20,213 INFO L93 Difference]: Finished difference Result 14961 states and 63207 transitions. [2021-06-12 20:43:20,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 20:43:20,213 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 30 [2021-06-12 20:43:20,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:20,246 INFO L225 Difference]: With dead ends: 14961 [2021-06-12 20:43:20,247 INFO L226 Difference]: Without dead ends: 14692 [2021-06-12 20:43:20,247 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 1712.4ms TimeCoverageRelationStatistics Valid=627, Invalid=3929, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 20:43:20,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14692 states. [2021-06-12 20:43:20,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14692 to 9127. [2021-06-12 20:43:20,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9127 states, 9126 states have (on average 4.484440061363138) internal successors, (40925), 9126 states have internal predecessors, (40925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:20,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9127 states to 9127 states and 40925 transitions. [2021-06-12 20:43:20,486 INFO L78 Accepts]: Start accepts. Automaton has 9127 states and 40925 transitions. Word has length 30 [2021-06-12 20:43:20,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:20,486 INFO L482 AbstractCegarLoop]: Abstraction has 9127 states and 40925 transitions. [2021-06-12 20:43:20,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:43:20,487 INFO L276 IsEmpty]: Start isEmpty. Operand 9127 states and 40925 transitions. [2021-06-12 20:43:20,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:43:20,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:20,502 INFO L472 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, 1] [2021-06-12 20:43:20,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable569,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:20,702 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:20,703 INFO L82 PathProgramCache]: Analyzing trace with hash 934548154, now seen corresponding path program 59 times [2021-06-12 20:43:20,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:20,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835575600] [2021-06-12 20:43:20,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:20,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:20,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835575600] [2021-06-12 20:43:20,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835575600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:20,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059470796] [2021-06-12 20:43:20,834 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 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 [2021-06-12 20:43:20,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:43:20,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:20,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:20,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:21,011 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 [2021-06-12 20:43:21,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:21,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:21,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:21,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:43:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:21,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059470796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:21,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:21,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:43:21,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454788897] [2021-06-12 20:43:21,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:43:21,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:21,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:43:21,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:43:21,049 INFO L87 Difference]: Start difference. First operand 9127 states and 40925 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:43:24,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:24,292 INFO L93 Difference]: Finished difference Result 15149 states and 64060 transitions. [2021-06-12 20:43:24,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 20:43:24,292 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 30 [2021-06-12 20:43:24,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:24,327 INFO L225 Difference]: With dead ends: 15149 [2021-06-12 20:43:24,327 INFO L226 Difference]: Without dead ends: 14955 [2021-06-12 20:43:24,328 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 1876.4ms TimeCoverageRelationStatistics Valid=771, Invalid=4631, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 20:43:24,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14955 states. [2021-06-12 20:43:24,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14955 to 9107. [2021-06-12 20:43:24,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9107 states, 9106 states have (on average 4.485723698660224) internal successors, (40847), 9106 states have internal predecessors, (40847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:24,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9107 states to 9107 states and 40847 transitions. [2021-06-12 20:43:24,569 INFO L78 Accepts]: Start accepts. Automaton has 9107 states and 40847 transitions. Word has length 30 [2021-06-12 20:43:24,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:24,569 INFO L482 AbstractCegarLoop]: Abstraction has 9107 states and 40847 transitions. [2021-06-12 20:43:24,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:43:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 9107 states and 40847 transitions. [2021-06-12 20:43:24,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:43:24,585 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:24,585 INFO L472 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] [2021-06-12 20:43:24,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:24,786 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:24,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:24,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1510385476, now seen corresponding path program 59 times [2021-06-12 20:43:24,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:24,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139953408] [2021-06-12 20:43:24,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:24,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:24,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139953408] [2021-06-12 20:43:24,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139953408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:24,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712241659] [2021-06-12 20:43:24,936 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 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 [2021-06-12 20:43:24,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:43:24,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:24,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:24,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:25,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:25,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:43:25,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:43:25,199 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 30 treesize of output 16 [2021-06-12 20:43:25,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:25,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:25,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:25,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:43:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:25,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712241659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:25,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:25,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:43:25,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360617714] [2021-06-12 20:43:25,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:43:25,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:25,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:43:25,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:43:25,254 INFO L87 Difference]: Start difference. First operand 9107 states and 40847 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 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) [2021-06-12 20:43:27,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:27,209 INFO L93 Difference]: Finished difference Result 12199 states and 52637 transitions. [2021-06-12 20:43:27,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 20:43:27,210 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 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 30 [2021-06-12 20:43:27,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:27,236 INFO L225 Difference]: With dead ends: 12199 [2021-06-12 20:43:27,236 INFO L226 Difference]: Without dead ends: 12108 [2021-06-12 20:43:27,236 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1444.6ms TimeCoverageRelationStatistics Valid=413, Invalid=2449, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:43:27,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12108 states. [2021-06-12 20:43:27,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12108 to 9107. [2021-06-12 20:43:27,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9107 states, 9106 states have (on average 4.485723698660224) internal successors, (40847), 9106 states have internal predecessors, (40847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:27,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9107 states to 9107 states and 40847 transitions. [2021-06-12 20:43:27,443 INFO L78 Accepts]: Start accepts. Automaton has 9107 states and 40847 transitions. Word has length 30 [2021-06-12 20:43:27,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:27,443 INFO L482 AbstractCegarLoop]: Abstraction has 9107 states and 40847 transitions. [2021-06-12 20:43:27,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 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) [2021-06-12 20:43:27,443 INFO L276 IsEmpty]: Start isEmpty. Operand 9107 states and 40847 transitions. [2021-06-12 20:43:27,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:43:27,459 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:27,459 INFO L472 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] [2021-06-12 20:43:27,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:27,659 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:27,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:27,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1172103252, now seen corresponding path program 60 times [2021-06-12 20:43:27,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:27,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585780229] [2021-06-12 20:43:27,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:27,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:27,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585780229] [2021-06-12 20:43:27,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585780229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:27,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226459155] [2021-06-12 20:43:27,826 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 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 [2021-06-12 20:43:27,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:43:27,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:27,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:43:27,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:28,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:28,001 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 [2021-06-12 20:43:28,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:28,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:28,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:28,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:43:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:28,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226459155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:28,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:28,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:43:28,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061726522] [2021-06-12 20:43:28,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:43:28,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:28,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:43:28,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:43:28,119 INFO L87 Difference]: Start difference. First operand 9107 states and 40847 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-06-12 20:43:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:32,224 INFO L93 Difference]: Finished difference Result 14629 states and 61863 transitions. [2021-06-12 20:43:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-12 20:43:32,224 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 30 [2021-06-12 20:43:32,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:32,258 INFO L225 Difference]: With dead ends: 14629 [2021-06-12 20:43:32,258 INFO L226 Difference]: Without dead ends: 14263 [2021-06-12 20:43:32,258 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2808 ImplicationChecksByTransitivity, 2613.3ms TimeCoverageRelationStatistics Valid=846, Invalid=7344, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 20:43:32,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14263 states. [2021-06-12 20:43:32,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14263 to 9432. [2021-06-12 20:43:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9432 states, 9431 states have (on average 4.491040186618598) internal successors, (42355), 9431 states have internal predecessors, (42355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:32,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9432 states to 9432 states and 42355 transitions. [2021-06-12 20:43:32,488 INFO L78 Accepts]: Start accepts. Automaton has 9432 states and 42355 transitions. Word has length 30 [2021-06-12 20:43:32,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:32,488 INFO L482 AbstractCegarLoop]: Abstraction has 9432 states and 42355 transitions. [2021-06-12 20:43:32,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-06-12 20:43:32,488 INFO L276 IsEmpty]: Start isEmpty. Operand 9432 states and 42355 transitions. [2021-06-12 20:43:32,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:43:32,505 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:32,505 INFO L472 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, 1] [2021-06-12 20:43:32,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:32,705 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:32,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:32,705 INFO L82 PathProgramCache]: Analyzing trace with hash 314992000, now seen corresponding path program 60 times [2021-06-12 20:43:32,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:32,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585173856] [2021-06-12 20:43:32,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:32,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:32,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585173856] [2021-06-12 20:43:32,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585173856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:32,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852710550] [2021-06-12 20:43:32,851 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 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 [2021-06-12 20:43:32,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:43:32,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:32,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:43:32,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:33,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:33,024 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 [2021-06-12 20:43:33,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:33,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:33,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:33,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:43:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:33,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852710550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:33,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:33,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:43:33,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152222684] [2021-06-12 20:43:33,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:43:33,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:33,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:43:33,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:43:33,123 INFO L87 Difference]: Start difference. First operand 9432 states and 42355 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2021-06-12 20:43:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:36,161 INFO L93 Difference]: Finished difference Result 13862 states and 59544 transitions. [2021-06-12 20:43:36,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 20:43:36,161 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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 30 [2021-06-12 20:43:36,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:36,197 INFO L225 Difference]: With dead ends: 13862 [2021-06-12 20:43:36,197 INFO L226 Difference]: Without dead ends: 13693 [2021-06-12 20:43:36,198 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1862.2ms TimeCoverageRelationStatistics Valid=610, Invalid=4792, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 20:43:36,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13693 states. [2021-06-12 20:43:36,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13693 to 9447. [2021-06-12 20:43:36,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9447 states, 9446 states have (on average 4.4908956171924626) internal successors, (42421), 9446 states have internal predecessors, (42421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:36,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9447 states to 9447 states and 42421 transitions. [2021-06-12 20:43:36,438 INFO L78 Accepts]: Start accepts. Automaton has 9447 states and 42421 transitions. Word has length 30 [2021-06-12 20:43:36,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:36,438 INFO L482 AbstractCegarLoop]: Abstraction has 9447 states and 42421 transitions. [2021-06-12 20:43:36,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2021-06-12 20:43:36,438 INFO L276 IsEmpty]: Start isEmpty. Operand 9447 states and 42421 transitions. [2021-06-12 20:43:36,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:43:36,454 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:36,454 INFO L472 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, 1] [2021-06-12 20:43:36,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-12 20:43:36,654 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:36,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:36,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2081020532, now seen corresponding path program 61 times [2021-06-12 20:43:36,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:36,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081892488] [2021-06-12 20:43:36,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:36,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:36,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081892488] [2021-06-12 20:43:36,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081892488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:36,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885378625] [2021-06-12 20:43:36,786 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 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 [2021-06-12 20:43:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:36,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:36,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:36,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-12 20:43:36,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:36,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:36,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:36,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:43:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:37,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885378625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:37,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:37,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:43:37,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387027239] [2021-06-12 20:43:37,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:43:37,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:37,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:43:37,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:43:37,002 INFO L87 Difference]: Start difference. First operand 9447 states and 42421 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:43:39,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:39,978 INFO L93 Difference]: Finished difference Result 15468 states and 65541 transitions. [2021-06-12 20:43:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 20:43:39,979 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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 30 [2021-06-12 20:43:39,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:40,018 INFO L225 Difference]: With dead ends: 15468 [2021-06-12 20:43:40,018 INFO L226 Difference]: Without dead ends: 15257 [2021-06-12 20:43:40,019 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1914 ImplicationChecksByTransitivity, 1659.0ms TimeCoverageRelationStatistics Valid=678, Invalid=4872, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 20:43:40,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15257 states. [2021-06-12 20:43:40,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15257 to 9628. [2021-06-12 20:43:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9628 states, 9627 states have (on average 4.4941310896437106) internal successors, (43265), 9627 states have internal predecessors, (43265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:40,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9628 states to 9628 states and 43265 transitions. [2021-06-12 20:43:40,282 INFO L78 Accepts]: Start accepts. Automaton has 9628 states and 43265 transitions. Word has length 30 [2021-06-12 20:43:40,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:40,282 INFO L482 AbstractCegarLoop]: Abstraction has 9628 states and 43265 transitions. [2021-06-12 20:43:40,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-06-12 20:43:40,282 INFO L276 IsEmpty]: Start isEmpty. Operand 9628 states and 43265 transitions. [2021-06-12 20:43:40,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:43:40,299 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:40,299 INFO L472 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] [2021-06-12 20:43:40,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:40,499 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:40,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:40,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1966270066, now seen corresponding path program 61 times [2021-06-12 20:43:40,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:40,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74088035] [2021-06-12 20:43:40,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:40,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:40,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74088035] [2021-06-12 20:43:40,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74088035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:40,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128859519] [2021-06-12 20:43:40,644 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 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 [2021-06-12 20:43:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:40,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:40,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:40,800 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 [2021-06-12 20:43:40,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:40,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:40,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:40,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:43:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:40,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128859519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:40,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:40,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:43:40,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394159959] [2021-06-12 20:43:40,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:43:40,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:40,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:43:40,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:43:40,856 INFO L87 Difference]: Start difference. First operand 9628 states and 43265 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:43:42,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:42,984 INFO L93 Difference]: Finished difference Result 13459 states and 58416 transitions. [2021-06-12 20:43:42,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 20:43:42,985 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 30 [2021-06-12 20:43:42,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:43,017 INFO L225 Difference]: With dead ends: 13459 [2021-06-12 20:43:43,017 INFO L226 Difference]: Without dead ends: 13338 [2021-06-12 20:43:43,018 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 1421.3ms TimeCoverageRelationStatistics Valid=735, Invalid=3821, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 20:43:43,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13338 states. [2021-06-12 20:43:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13338 to 9666. [2021-06-12 20:43:43,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9666 states, 9665 states have (on average 4.491257113295395) internal successors, (43408), 9665 states have internal predecessors, (43408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:43,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9666 states to 9666 states and 43408 transitions. [2021-06-12 20:43:43,256 INFO L78 Accepts]: Start accepts. Automaton has 9666 states and 43408 transitions. Word has length 30 [2021-06-12 20:43:43,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:43,256 INFO L482 AbstractCegarLoop]: Abstraction has 9666 states and 43408 transitions. [2021-06-12 20:43:43,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:43:43,257 INFO L276 IsEmpty]: Start isEmpty. Operand 9666 states and 43408 transitions. [2021-06-12 20:43:43,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:43:43,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:43,273 INFO L472 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] [2021-06-12 20:43:43,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-06-12 20:43:43,473 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:43,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:43,474 INFO L82 PathProgramCache]: Analyzing trace with hash -953481476, now seen corresponding path program 62 times [2021-06-12 20:43:43,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:43,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102303443] [2021-06-12 20:43:43,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:43,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:43,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102303443] [2021-06-12 20:43:43,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102303443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:43,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545806198] [2021-06-12 20:43:43,613 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 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 [2021-06-12 20:43:43,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:43:43,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:43,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:43:43,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:43,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:43,767 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 [2021-06-12 20:43:43,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:43,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:43,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:43,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:43:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:43,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545806198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:43,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:43,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:43:43,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590797603] [2021-06-12 20:43:43,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:43:43,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:43,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:43:43,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:43:43,914 INFO L87 Difference]: Start difference. First operand 9666 states and 43408 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-06-12 20:43:47,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:47,104 INFO L93 Difference]: Finished difference Result 12167 states and 53056 transitions. [2021-06-12 20:43:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 20:43:47,104 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 30 [2021-06-12 20:43:47,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:47,131 INFO L225 Difference]: With dead ends: 12167 [2021-06-12 20:43:47,131 INFO L226 Difference]: Without dead ends: 11959 [2021-06-12 20:43:47,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 2275.9ms TimeCoverageRelationStatistics Valid=666, Invalid=4304, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 20:43:47,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11959 states. [2021-06-12 20:43:47,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11959 to 9679. [2021-06-12 20:43:47,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9679 states, 9678 states have (on average 4.491010539367638) internal successors, (43464), 9678 states have internal predecessors, (43464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:47,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9679 states to 9679 states and 43464 transitions. [2021-06-12 20:43:47,358 INFO L78 Accepts]: Start accepts. Automaton has 9679 states and 43464 transitions. Word has length 30 [2021-06-12 20:43:47,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:47,358 INFO L482 AbstractCegarLoop]: Abstraction has 9679 states and 43464 transitions. [2021-06-12 20:43:47,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-06-12 20:43:47,358 INFO L276 IsEmpty]: Start isEmpty. Operand 9679 states and 43464 transitions. [2021-06-12 20:43:47,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:43:47,375 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:47,375 INFO L472 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] [2021-06-12 20:43:47,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable579,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:47,576 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:47,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:47,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1267007872, now seen corresponding path program 63 times [2021-06-12 20:43:47,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:47,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989759407] [2021-06-12 20:43:47,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:47,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:47,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989759407] [2021-06-12 20:43:47,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989759407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:47,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741869531] [2021-06-12 20:43:47,723 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 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 [2021-06-12 20:43:47,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:43:47,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:47,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:43:47,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:47,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:47,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-12 20:43:47,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:47,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:47,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:47,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:43:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:48,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741869531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:48,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:48,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:43:48,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983872291] [2021-06-12 20:43:48,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:43:48,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:48,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:43:48,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:43:48,048 INFO L87 Difference]: Start difference. First operand 9679 states and 43464 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-06-12 20:43:51,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:51,013 INFO L93 Difference]: Finished difference Result 12205 states and 53571 transitions. [2021-06-12 20:43:51,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 20:43:51,014 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 30 [2021-06-12 20:43:51,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:51,041 INFO L225 Difference]: With dead ends: 12205 [2021-06-12 20:43:51,041 INFO L226 Difference]: Without dead ends: 11981 [2021-06-12 20:43:51,042 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 2265.7ms TimeCoverageRelationStatistics Valid=733, Invalid=4097, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 20:43:51,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11981 states. [2021-06-12 20:43:51,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11981 to 9672. [2021-06-12 20:43:51,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9672 states, 9671 states have (on average 4.491572743253024) internal successors, (43438), 9671 states have internal predecessors, (43438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:51,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9672 states to 9672 states and 43438 transitions. [2021-06-12 20:43:51,261 INFO L78 Accepts]: Start accepts. Automaton has 9672 states and 43438 transitions. Word has length 30 [2021-06-12 20:43:51,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:51,261 INFO L482 AbstractCegarLoop]: Abstraction has 9672 states and 43438 transitions. [2021-06-12 20:43:51,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-06-12 20:43:51,261 INFO L276 IsEmpty]: Start isEmpty. Operand 9672 states and 43438 transitions. [2021-06-12 20:43:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:43:51,277 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:51,277 INFO L472 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] [2021-06-12 20:43:51,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:51,478 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:51,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:51,478 INFO L82 PathProgramCache]: Analyzing trace with hash 343082850, now seen corresponding path program 64 times [2021-06-12 20:43:51,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:51,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106505006] [2021-06-12 20:43:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:51,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:51,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106505006] [2021-06-12 20:43:51,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106505006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:51,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635141469] [2021-06-12 20:43:51,703 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 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 [2021-06-12 20:43:51,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:43:51,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:51,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:51,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:51,847 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 21 treesize of output 13 [2021-06-12 20:43:51,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:51,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:51,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:51,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:43:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:51,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635141469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:51,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:51,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:43:51,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707273318] [2021-06-12 20:43:51,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:43:51,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:51,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:43:51,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:43:51,921 INFO L87 Difference]: Start difference. First operand 9672 states and 43438 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:43:54,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:54,110 INFO L93 Difference]: Finished difference Result 12132 states and 53078 transitions. [2021-06-12 20:43:54,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 20:43:54,110 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 30 [2021-06-12 20:43:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:54,137 INFO L225 Difference]: With dead ends: 12132 [2021-06-12 20:43:54,137 INFO L226 Difference]: Without dead ends: 12027 [2021-06-12 20:43:54,137 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1691.3ms TimeCoverageRelationStatistics Valid=619, Invalid=3413, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 20:43:54,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12027 states. [2021-06-12 20:43:54,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12027 to 9674. [2021-06-12 20:43:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9674 states, 9673 states have (on average 4.491677866225577) internal successors, (43448), 9673 states have internal predecessors, (43448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:54,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9674 states to 9674 states and 43448 transitions. [2021-06-12 20:43:54,350 INFO L78 Accepts]: Start accepts. Automaton has 9674 states and 43448 transitions. Word has length 30 [2021-06-12 20:43:54,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:54,350 INFO L482 AbstractCegarLoop]: Abstraction has 9674 states and 43448 transitions. [2021-06-12 20:43:54,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:43:54,350 INFO L276 IsEmpty]: Start isEmpty. Operand 9674 states and 43448 transitions. [2021-06-12 20:43:54,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:43:54,367 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:54,367 INFO L472 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] [2021-06-12 20:43:54,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-06-12 20:43:54,567 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:54,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:54,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1007485592, now seen corresponding path program 65 times [2021-06-12 20:43:54,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:54,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689519307] [2021-06-12 20:43:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:54,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:54,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689519307] [2021-06-12 20:43:54,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689519307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:54,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560763751] [2021-06-12 20:43:54,716 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 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 [2021-06-12 20:43:54,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:43:54,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:54,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:54,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:54,927 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 [2021-06-12 20:43:54,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:54,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:54,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:54,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:43:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:55,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560763751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:55,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:55,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:43:55,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921426936] [2021-06-12 20:43:55,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:43:55,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:55,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:43:55,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:43:55,001 INFO L87 Difference]: Start difference. First operand 9674 states and 43448 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:43:57,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:57,138 INFO L93 Difference]: Finished difference Result 13227 states and 56952 transitions. [2021-06-12 20:43:57,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 20:43:57,138 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 30 [2021-06-12 20:43:57,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:57,170 INFO L225 Difference]: With dead ends: 13227 [2021-06-12 20:43:57,170 INFO L226 Difference]: Without dead ends: 13133 [2021-06-12 20:43:57,171 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 1544.9ms TimeCoverageRelationStatistics Valid=742, Invalid=4088, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 20:43:57,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13133 states. [2021-06-12 20:43:57,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13133 to 9693. [2021-06-12 20:43:57,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9693 states, 9692 states have (on average 4.491848947585638) internal successors, (43535), 9692 states have internal predecessors, (43535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:57,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9693 states to 9693 states and 43535 transitions. [2021-06-12 20:43:57,407 INFO L78 Accepts]: Start accepts. Automaton has 9693 states and 43535 transitions. Word has length 30 [2021-06-12 20:43:57,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:57,408 INFO L482 AbstractCegarLoop]: Abstraction has 9693 states and 43535 transitions. [2021-06-12 20:43:57,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:43:57,408 INFO L276 IsEmpty]: Start isEmpty. Operand 9693 states and 43535 transitions. [2021-06-12 20:43:57,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:43:57,424 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:57,424 INFO L472 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] [2021-06-12 20:43:57,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-12 20:43:57,625 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:43:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:57,625 INFO L82 PathProgramCache]: Analyzing trace with hash -375717864, now seen corresponding path program 66 times [2021-06-12 20:43:57,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:57,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488112630] [2021-06-12 20:43:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:57,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:57,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488112630] [2021-06-12 20:43:57,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488112630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:57,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120432137] [2021-06-12 20:43:57,767 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 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 [2021-06-12 20:43:57,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:43:57,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:57,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:43:57,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:57,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:57,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:57,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:57,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-12 20:43:57,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:58,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:58,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:58,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-06-12 20:43:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:58,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120432137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:58,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:58,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:43:58,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901383154] [2021-06-12 20:43:58,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:43:58,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:58,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:43:58,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:43:58,190 INFO L87 Difference]: Start difference. First operand 9693 states and 43535 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:44:01,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:01,782 INFO L93 Difference]: Finished difference Result 12363 states and 54001 transitions. [2021-06-12 20:44:01,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 20:44:01,782 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-06-12 20:44:01,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:01,809 INFO L225 Difference]: With dead ends: 12363 [2021-06-12 20:44:01,809 INFO L226 Difference]: Without dead ends: 12080 [2021-06-12 20:44:01,810 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2130 ImplicationChecksByTransitivity, 2711.7ms TimeCoverageRelationStatistics Valid=1061, Invalid=5581, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 20:44:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12080 states. [2021-06-12 20:44:01,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12080 to 9702. [2021-06-12 20:44:01,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9702 states, 9701 states have (on average 4.491083393464591) internal successors, (43568), 9701 states have internal predecessors, (43568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9702 states to 9702 states and 43568 transitions. [2021-06-12 20:44:02,016 INFO L78 Accepts]: Start accepts. Automaton has 9702 states and 43568 transitions. Word has length 30 [2021-06-12 20:44:02,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:02,016 INFO L482 AbstractCegarLoop]: Abstraction has 9702 states and 43568 transitions. [2021-06-12 20:44:02,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:44:02,016 INFO L276 IsEmpty]: Start isEmpty. Operand 9702 states and 43568 transitions. [2021-06-12 20:44:02,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:02,033 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:02,033 INFO L472 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] [2021-06-12 20:44:02,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-12 20:44:02,233 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:02,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:02,233 INFO L82 PathProgramCache]: Analyzing trace with hash -2135008526, now seen corresponding path program 67 times [2021-06-12 20:44:02,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:02,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945362769] [2021-06-12 20:44:02,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:02,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:02,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945362769] [2021-06-12 20:44:02,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945362769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:02,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158554421] [2021-06-12 20:44:02,389 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 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 [2021-06-12 20:44:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:02,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:02,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:02,527 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 [2021-06-12 20:44:02,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:02,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:02,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:02,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:44:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:02,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158554421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:02,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:02,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:44:02,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868709647] [2021-06-12 20:44:02,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:44:02,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:02,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:44:02,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:44:02,603 INFO L87 Difference]: Start difference. First operand 9702 states and 43568 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2021-06-12 20:44:05,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:05,457 INFO L93 Difference]: Finished difference Result 14077 states and 60868 transitions. [2021-06-12 20:44:05,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-12 20:44:05,458 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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 30 [2021-06-12 20:44:05,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:05,490 INFO L225 Difference]: With dead ends: 14077 [2021-06-12 20:44:05,490 INFO L226 Difference]: Without dead ends: 13969 [2021-06-12 20:44:05,491 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 2035.9ms TimeCoverageRelationStatistics Valid=1140, Invalid=6000, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 20:44:05,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13969 states. [2021-06-12 20:44:05,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13969 to 9726. [2021-06-12 20:44:05,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9726 states, 9725 states have (on average 4.4917223650385605) internal successors, (43682), 9725 states have internal predecessors, (43682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:05,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9726 states to 9726 states and 43682 transitions. [2021-06-12 20:44:05,727 INFO L78 Accepts]: Start accepts. Automaton has 9726 states and 43682 transitions. Word has length 30 [2021-06-12 20:44:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:05,727 INFO L482 AbstractCegarLoop]: Abstraction has 9726 states and 43682 transitions. [2021-06-12 20:44:05,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2021-06-12 20:44:05,727 INFO L276 IsEmpty]: Start isEmpty. Operand 9726 states and 43682 transitions. [2021-06-12 20:44:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:05,744 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:05,744 INFO L472 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, 1] [2021-06-12 20:44:05,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:05,945 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:05,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:05,945 INFO L82 PathProgramCache]: Analyzing trace with hash -587718528, now seen corresponding path program 62 times [2021-06-12 20:44:05,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:05,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964732446] [2021-06-12 20:44:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:06,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:06,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964732446] [2021-06-12 20:44:06,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964732446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:06,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350005757] [2021-06-12 20:44:06,089 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 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 [2021-06-12 20:44:06,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:44:06,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:06,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:44:06,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:06,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:06,246 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 [2021-06-12 20:44:06,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:06,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:06,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:06,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:44:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:06,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350005757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:06,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:06,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:44:06,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299300547] [2021-06-12 20:44:06,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:44:06,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:06,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:44:06,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:44:06,376 INFO L87 Difference]: Start difference. First operand 9726 states and 43682 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2021-06-12 20:44:08,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:08,871 INFO L93 Difference]: Finished difference Result 12036 states and 52829 transitions. [2021-06-12 20:44:08,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 20:44:08,872 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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 30 [2021-06-12 20:44:08,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:08,898 INFO L225 Difference]: With dead ends: 12036 [2021-06-12 20:44:08,899 INFO L226 Difference]: Without dead ends: 11923 [2021-06-12 20:44:08,899 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1807.3ms TimeCoverageRelationStatistics Valid=512, Invalid=3028, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:44:08,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11923 states. [2021-06-12 20:44:09,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11923 to 9747. [2021-06-12 20:44:09,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9747 states, 9746 states have (on average 4.4923045351939255) internal successors, (43782), 9746 states have internal predecessors, (43782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:09,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9747 states to 9747 states and 43782 transitions. [2021-06-12 20:44:09,118 INFO L78 Accepts]: Start accepts. Automaton has 9747 states and 43782 transitions. Word has length 30 [2021-06-12 20:44:09,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:09,118 INFO L482 AbstractCegarLoop]: Abstraction has 9747 states and 43782 transitions. [2021-06-12 20:44:09,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2021-06-12 20:44:09,119 INFO L276 IsEmpty]: Start isEmpty. Operand 9747 states and 43782 transitions. [2021-06-12 20:44:09,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:09,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:09,135 INFO L472 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, 1] [2021-06-12 20:44:09,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:09,336 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:09,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:09,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1247335186, now seen corresponding path program 63 times [2021-06-12 20:44:09,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:09,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498324689] [2021-06-12 20:44:09,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:09,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:09,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498324689] [2021-06-12 20:44:09,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498324689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:09,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100413149] [2021-06-12 20:44:09,475 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 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 [2021-06-12 20:44:09,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:44:09,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:09,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:44:09,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:09,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:09,629 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 [2021-06-12 20:44:09,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:09,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:09,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:09,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:44:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:09,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100413149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:09,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:09,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:44:09,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914421944] [2021-06-12 20:44:09,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:09,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:09,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:09,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:09,776 INFO L87 Difference]: Start difference. First operand 9747 states and 43782 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-06-12 20:44:12,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:12,630 INFO L93 Difference]: Finished difference Result 12101 states and 53154 transitions. [2021-06-12 20:44:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 20:44:12,630 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 30 [2021-06-12 20:44:12,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:12,657 INFO L225 Difference]: With dead ends: 12101 [2021-06-12 20:44:12,657 INFO L226 Difference]: Without dead ends: 11937 [2021-06-12 20:44:12,657 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 2002.7ms TimeCoverageRelationStatistics Valid=635, Invalid=3525, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 20:44:12,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11937 states. [2021-06-12 20:44:12,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11937 to 9741. [2021-06-12 20:44:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9741 states, 9740 states have (on average 4.492607802874743) internal successors, (43758), 9740 states have internal predecessors, (43758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:12,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9741 states to 9741 states and 43758 transitions. [2021-06-12 20:44:12,873 INFO L78 Accepts]: Start accepts. Automaton has 9741 states and 43758 transitions. Word has length 30 [2021-06-12 20:44:12,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:12,873 INFO L482 AbstractCegarLoop]: Abstraction has 9741 states and 43758 transitions. [2021-06-12 20:44:12,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-06-12 20:44:12,873 INFO L276 IsEmpty]: Start isEmpty. Operand 9741 states and 43758 transitions. [2021-06-12 20:44:12,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:12,889 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:12,889 INFO L472 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, 1] [2021-06-12 20:44:13,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-06-12 20:44:13,090 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:13,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:13,090 INFO L82 PathProgramCache]: Analyzing trace with hash -759920676, now seen corresponding path program 64 times [2021-06-12 20:44:13,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:13,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008533244] [2021-06-12 20:44:13,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:13,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:13,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008533244] [2021-06-12 20:44:13,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008533244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:13,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145172442] [2021-06-12 20:44:13,214 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 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 [2021-06-12 20:44:13,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:44:13,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:13,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:13,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:13,357 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 [2021-06-12 20:44:13,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:13,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:13,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:13,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:44:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:13,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145172442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:13,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:13,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:44:13,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795579469] [2021-06-12 20:44:13,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:44:13,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:13,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:44:13,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:44:13,417 INFO L87 Difference]: Start difference. First operand 9741 states and 43758 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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) [2021-06-12 20:44:15,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:15,299 INFO L93 Difference]: Finished difference Result 12048 states and 52970 transitions. [2021-06-12 20:44:15,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 20:44:15,299 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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 30 [2021-06-12 20:44:15,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:15,325 INFO L225 Difference]: With dead ends: 12048 [2021-06-12 20:44:15,325 INFO L226 Difference]: Without dead ends: 11939 [2021-06-12 20:44:15,326 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1315.8ms TimeCoverageRelationStatistics Valid=468, Invalid=2394, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:44:15,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11939 states. [2021-06-12 20:44:15,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11939 to 9735. [2021-06-12 20:44:15,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9735 states, 9734 states have (on average 4.4917813848366555) internal successors, (43723), 9734 states have internal predecessors, (43723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:15,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9735 states to 9735 states and 43723 transitions. [2021-06-12 20:44:15,539 INFO L78 Accepts]: Start accepts. Automaton has 9735 states and 43723 transitions. Word has length 30 [2021-06-12 20:44:15,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:15,539 INFO L482 AbstractCegarLoop]: Abstraction has 9735 states and 43723 transitions. [2021-06-12 20:44:15,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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) [2021-06-12 20:44:15,539 INFO L276 IsEmpty]: Start isEmpty. Operand 9735 states and 43723 transitions. [2021-06-12 20:44:15,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:15,556 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:15,556 INFO L472 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, 1] [2021-06-12 20:44:15,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-12 20:44:15,756 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:15,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:15,756 INFO L82 PathProgramCache]: Analyzing trace with hash 708845798, now seen corresponding path program 65 times [2021-06-12 20:44:15,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:15,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132842314] [2021-06-12 20:44:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:15,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:15,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:15,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132842314] [2021-06-12 20:44:15,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132842314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:15,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752262633] [2021-06-12 20:44:15,884 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 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 [2021-06-12 20:44:15,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:44:15,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:15,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:15,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:16,029 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 [2021-06-12 20:44:16,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:16,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:16,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:16,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:44:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:16,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752262633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:16,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:16,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:44:16,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855076465] [2021-06-12 20:44:16,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:44:16,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:16,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:44:16,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:44:16,103 INFO L87 Difference]: Start difference. First operand 9735 states and 43723 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:44:18,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:18,154 INFO L93 Difference]: Finished difference Result 12077 states and 53024 transitions. [2021-06-12 20:44:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 20:44:18,155 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 30 [2021-06-12 20:44:18,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:18,181 INFO L225 Difference]: With dead ends: 12077 [2021-06-12 20:44:18,181 INFO L226 Difference]: Without dead ends: 11988 [2021-06-12 20:44:18,181 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1407.9ms TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:44:18,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11988 states. [2021-06-12 20:44:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11988 to 9749. [2021-06-12 20:44:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9749 states, 9748 states have (on average 4.493126795240049) internal successors, (43799), 9748 states have internal predecessors, (43799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:18,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9749 states to 9749 states and 43799 transitions. [2021-06-12 20:44:18,395 INFO L78 Accepts]: Start accepts. Automaton has 9749 states and 43799 transitions. Word has length 30 [2021-06-12 20:44:18,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:18,396 INFO L482 AbstractCegarLoop]: Abstraction has 9749 states and 43799 transitions. [2021-06-12 20:44:18,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:44:18,396 INFO L276 IsEmpty]: Start isEmpty. Operand 9749 states and 43799 transitions. [2021-06-12 20:44:18,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:18,413 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:18,413 INFO L472 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, 1] [2021-06-12 20:44:18,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-06-12 20:44:18,613 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:18,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:18,613 INFO L82 PathProgramCache]: Analyzing trace with hash 456788344, now seen corresponding path program 66 times [2021-06-12 20:44:18,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:18,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671948441] [2021-06-12 20:44:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:18,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:18,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671948441] [2021-06-12 20:44:18,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671948441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:18,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314876460] [2021-06-12 20:44:18,741 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 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 [2021-06-12 20:44:18,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:44:18,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:18,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:18,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:18,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:18,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:18,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:18,905 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 25 treesize of output 53 [2021-06-12 20:44:18,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:18,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:18,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:18,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-06-12 20:44:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:19,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314876460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:19,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:19,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:44:19,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108644365] [2021-06-12 20:44:19,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:44:19,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:19,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:44:19,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:44:19,135 INFO L87 Difference]: Start difference. First operand 9749 states and 43799 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:44:21,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:21,754 INFO L93 Difference]: Finished difference Result 11130 states and 49227 transitions. [2021-06-12 20:44:21,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 20:44:21,754 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-06-12 20:44:21,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:21,779 INFO L225 Difference]: With dead ends: 11130 [2021-06-12 20:44:21,779 INFO L226 Difference]: Without dead ends: 10970 [2021-06-12 20:44:21,779 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1963.2ms TimeCoverageRelationStatistics Valid=489, Invalid=3543, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 20:44:21,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10970 states. [2021-06-12 20:44:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10970 to 9747. [2021-06-12 20:44:21,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9747 states, 9746 states have (on average 4.492920172378412) internal successors, (43788), 9746 states have internal predecessors, (43788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9747 states to 9747 states and 43788 transitions. [2021-06-12 20:44:21,994 INFO L78 Accepts]: Start accepts. Automaton has 9747 states and 43788 transitions. Word has length 30 [2021-06-12 20:44:21,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:21,994 INFO L482 AbstractCegarLoop]: Abstraction has 9747 states and 43788 transitions. [2021-06-12 20:44:21,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:44:21,994 INFO L276 IsEmpty]: Start isEmpty. Operand 9747 states and 43788 transitions. [2021-06-12 20:44:22,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:22,012 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:22,012 INFO L472 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, 1] [2021-06-12 20:44:22,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:22,212 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:22,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:22,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1957586502, now seen corresponding path program 67 times [2021-06-12 20:44:22,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:22,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443644399] [2021-06-12 20:44:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:22,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:22,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443644399] [2021-06-12 20:44:22,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443644399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:22,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309512971] [2021-06-12 20:44:22,342 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 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 [2021-06-12 20:44:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:22,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:22,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:22,489 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 [2021-06-12 20:44:22,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:22,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:22,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:22,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:44:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:22,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309512971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:22,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:22,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:44:22,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197605669] [2021-06-12 20:44:22,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:44:22,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:22,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:44:22,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:44:22,570 INFO L87 Difference]: Start difference. First operand 9747 states and 43788 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2021-06-12 20:44:24,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:24,962 INFO L93 Difference]: Finished difference Result 12893 states and 56018 transitions. [2021-06-12 20:44:24,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 20:44:24,962 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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 30 [2021-06-12 20:44:24,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:24,992 INFO L225 Difference]: With dead ends: 12893 [2021-06-12 20:44:24,992 INFO L226 Difference]: Without dead ends: 12796 [2021-06-12 20:44:24,993 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1718.7ms TimeCoverageRelationStatistics Valid=862, Invalid=4394, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 20:44:25,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12796 states. [2021-06-12 20:44:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12796 to 9748. [2021-06-12 20:44:25,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9748 states, 9747 states have (on average 4.49317738791423) internal successors, (43795), 9747 states have internal predecessors, (43795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9748 states to 9748 states and 43795 transitions. [2021-06-12 20:44:25,212 INFO L78 Accepts]: Start accepts. Automaton has 9748 states and 43795 transitions. Word has length 30 [2021-06-12 20:44:25,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:25,212 INFO L482 AbstractCegarLoop]: Abstraction has 9748 states and 43795 transitions. [2021-06-12 20:44:25,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2021-06-12 20:44:25,212 INFO L276 IsEmpty]: Start isEmpty. Operand 9748 states and 43795 transitions. [2021-06-12 20:44:25,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:25,229 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:25,229 INFO L472 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, 1] [2021-06-12 20:44:25,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-06-12 20:44:25,429 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:25,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:25,430 INFO L82 PathProgramCache]: Analyzing trace with hash -95445832, now seen corresponding path program 68 times [2021-06-12 20:44:25,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:25,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858183863] [2021-06-12 20:44:25,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:25,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:25,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858183863] [2021-06-12 20:44:25,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858183863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:25,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908660831] [2021-06-12 20:44:25,571 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 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 [2021-06-12 20:44:25,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:44:25,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:25,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:44:25,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:25,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:25,734 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 [2021-06-12 20:44:25,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:25,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:25,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:25,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:44:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:25,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908660831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:25,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:25,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:44:25,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874625178] [2021-06-12 20:44:25,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:25,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:25,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:25,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:25,853 INFO L87 Difference]: Start difference. First operand 9748 states and 43795 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:44:29,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:29,552 INFO L93 Difference]: Finished difference Result 13765 states and 59658 transitions. [2021-06-12 20:44:29,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 20:44:29,552 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:44:29,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:29,584 INFO L225 Difference]: With dead ends: 13765 [2021-06-12 20:44:29,584 INFO L226 Difference]: Without dead ends: 13599 [2021-06-12 20:44:29,585 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 2550.2ms TimeCoverageRelationStatistics Valid=1127, Invalid=6355, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 20:44:29,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13599 states. [2021-06-12 20:44:29,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13599 to 9762. [2021-06-12 20:44:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9762 states, 9761 states have (on average 4.493187173445344) internal successors, (43858), 9761 states have internal predecessors, (43858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9762 states to 9762 states and 43858 transitions. [2021-06-12 20:44:29,826 INFO L78 Accepts]: Start accepts. Automaton has 9762 states and 43858 transitions. Word has length 30 [2021-06-12 20:44:29,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:29,826 INFO L482 AbstractCegarLoop]: Abstraction has 9762 states and 43858 transitions. [2021-06-12 20:44:29,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:44:29,826 INFO L276 IsEmpty]: Start isEmpty. Operand 9762 states and 43858 transitions. [2021-06-12 20:44:29,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:29,843 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:29,843 INFO L472 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, 1] [2021-06-12 20:44:30,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:30,044 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:30,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:30,044 INFO L82 PathProgramCache]: Analyzing trace with hash -731912686, now seen corresponding path program 69 times [2021-06-12 20:44:30,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:30,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865412020] [2021-06-12 20:44:30,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:30,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:30,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865412020] [2021-06-12 20:44:30,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865412020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:30,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940928877] [2021-06-12 20:44:30,173 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 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 [2021-06-12 20:44:30,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:44:30,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:30,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:44:30,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:30,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:30,321 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 [2021-06-12 20:44:30,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:30,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:30,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:30,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:44:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:30,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940928877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:30,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:30,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:44:30,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359089815] [2021-06-12 20:44:30,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:30,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:30,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:30,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:30,434 INFO L87 Difference]: Start difference. First operand 9762 states and 43858 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:44:33,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:33,543 INFO L93 Difference]: Finished difference Result 13721 states and 59321 transitions. [2021-06-12 20:44:33,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-12 20:44:33,544 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:44:33,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:33,575 INFO L225 Difference]: With dead ends: 13721 [2021-06-12 20:44:33,575 INFO L226 Difference]: Without dead ends: 13640 [2021-06-12 20:44:33,576 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2401 ImplicationChecksByTransitivity, 2165.5ms TimeCoverageRelationStatistics Valid=1089, Invalid=5883, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 20:44:33,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13640 states. [2021-06-12 20:44:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13640 to 9745. [2021-06-12 20:44:33,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9745 states, 9744 states have (on average 4.493123973727422) internal successors, (43781), 9744 states have internal predecessors, (43781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:33,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9745 states to 9745 states and 43781 transitions. [2021-06-12 20:44:33,902 INFO L78 Accepts]: Start accepts. Automaton has 9745 states and 43781 transitions. Word has length 30 [2021-06-12 20:44:33,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:33,902 INFO L482 AbstractCegarLoop]: Abstraction has 9745 states and 43781 transitions. [2021-06-12 20:44:33,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:44:33,903 INFO L276 IsEmpty]: Start isEmpty. Operand 9745 states and 43781 transitions. [2021-06-12 20:44:33,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:33,920 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:33,920 INFO L472 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] [2021-06-12 20:44:34,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:34,120 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:34,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:34,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1293295150, now seen corresponding path program 28 times [2021-06-12 20:44:34,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:34,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798375830] [2021-06-12 20:44:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:34,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:34,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798375830] [2021-06-12 20:44:34,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798375830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:34,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988104306] [2021-06-12 20:44:34,310 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 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 [2021-06-12 20:44:34,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:44:34,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:34,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:34,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:34,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:34,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:34,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:34,508 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 29 treesize of output 15 [2021-06-12 20:44:34,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:34,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:34,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:34,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-12 20:44:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:34,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988104306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:34,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:34,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:44:34,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773987939] [2021-06-12 20:44:34,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:44:34,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:34,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:44:34,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:44:34,544 INFO L87 Difference]: Start difference. First operand 9745 states and 43781 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:44:36,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:36,201 INFO L93 Difference]: Finished difference Result 12248 states and 52916 transitions. [2021-06-12 20:44:36,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:44:36,202 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 30 [2021-06-12 20:44:36,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:36,229 INFO L225 Difference]: With dead ends: 12248 [2021-06-12 20:44:36,229 INFO L226 Difference]: Without dead ends: 12131 [2021-06-12 20:44:36,229 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 858.8ms TimeCoverageRelationStatistics Valid=239, Invalid=1483, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:44:36,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12131 states. [2021-06-12 20:44:36,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12131 to 9792. [2021-06-12 20:44:36,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9792 states, 9791 states have (on average 4.493922990501481) internal successors, (44000), 9791 states have internal predecessors, (44000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:36,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9792 states to 9792 states and 44000 transitions. [2021-06-12 20:44:36,451 INFO L78 Accepts]: Start accepts. Automaton has 9792 states and 44000 transitions. Word has length 30 [2021-06-12 20:44:36,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:36,451 INFO L482 AbstractCegarLoop]: Abstraction has 9792 states and 44000 transitions. [2021-06-12 20:44:36,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:44:36,451 INFO L276 IsEmpty]: Start isEmpty. Operand 9792 states and 44000 transitions. [2021-06-12 20:44:36,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:36,469 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:36,469 INFO L472 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] [2021-06-12 20:44:36,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:36,670 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:36,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:36,670 INFO L82 PathProgramCache]: Analyzing trace with hash -2003594308, now seen corresponding path program 5 times [2021-06-12 20:44:36,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:36,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774079040] [2021-06-12 20:44:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:36,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:36,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774079040] [2021-06-12 20:44:36,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774079040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:36,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902911844] [2021-06-12 20:44:36,794 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 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 [2021-06-12 20:44:36,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:44:36,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:36,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:36,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:37,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:37,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:37,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:37,080 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 29 treesize of output 15 [2021-06-12 20:44:37,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:37,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:37,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:37,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-12 20:44:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:37,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902911844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:37,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:37,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-12 20:44:37,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649099261] [2021-06-12 20:44:37,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:44:37,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:37,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:44:37,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:44:37,115 INFO L87 Difference]: Start difference. First operand 9792 states and 44000 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-06-12 20:44:37,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:37,770 INFO L93 Difference]: Finished difference Result 10594 states and 47151 transitions. [2021-06-12 20:44:37,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:44:37,770 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 30 [2021-06-12 20:44:37,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:37,793 INFO L225 Difference]: With dead ends: 10594 [2021-06-12 20:44:37,793 INFO L226 Difference]: Without dead ends: 10388 [2021-06-12 20:44:37,793 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 428.5ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:37,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10388 states. [2021-06-12 20:44:37,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10388 to 9816. [2021-06-12 20:44:37,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9816 states, 9815 states have (on average 4.491594498217014) internal successors, (44085), 9815 states have internal predecessors, (44085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9816 states to 9816 states and 44085 transitions. [2021-06-12 20:44:37,992 INFO L78 Accepts]: Start accepts. Automaton has 9816 states and 44085 transitions. Word has length 30 [2021-06-12 20:44:37,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:37,992 INFO L482 AbstractCegarLoop]: Abstraction has 9816 states and 44085 transitions. [2021-06-12 20:44:37,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-06-12 20:44:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 9816 states and 44085 transitions. [2021-06-12 20:44:38,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:38,009 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:38,009 INFO L472 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] [2021-06-12 20:44:38,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-06-12 20:44:38,210 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:38,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:38,210 INFO L82 PathProgramCache]: Analyzing trace with hash 2026530574, now seen corresponding path program 29 times [2021-06-12 20:44:38,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:38,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729206312] [2021-06-12 20:44:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:38,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:38,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729206312] [2021-06-12 20:44:38,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729206312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:38,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32423346] [2021-06-12 20:44:38,391 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 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 [2021-06-12 20:44:38,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:44:38,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:38,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:38,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:38,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:38,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:38,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:38,584 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 30 treesize of output 16 [2021-06-12 20:44:38,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:38,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:38,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:38,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:44:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:38,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32423346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:38,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:38,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:44:38,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310349189] [2021-06-12 20:44:38,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:44:38,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:38,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:44:38,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:44:38,648 INFO L87 Difference]: Start difference. First operand 9816 states and 44085 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:44:39,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:39,847 INFO L93 Difference]: Finished difference Result 11346 states and 49863 transitions. [2021-06-12 20:44:39,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:44:39,848 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 30 [2021-06-12 20:44:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:39,873 INFO L225 Difference]: With dead ends: 11346 [2021-06-12 20:44:39,873 INFO L226 Difference]: Without dead ends: 11186 [2021-06-12 20:44:39,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 890.3ms TimeCoverageRelationStatistics Valid=265, Invalid=1295, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:44:39,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11186 states. [2021-06-12 20:44:40,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11186 to 9875. [2021-06-12 20:44:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9875 states, 9874 states have (on average 4.494936196070488) internal successors, (44383), 9874 states have internal predecessors, (44383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:40,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9875 states to 9875 states and 44383 transitions. [2021-06-12 20:44:40,158 INFO L78 Accepts]: Start accepts. Automaton has 9875 states and 44383 transitions. Word has length 30 [2021-06-12 20:44:40,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:40,158 INFO L482 AbstractCegarLoop]: Abstraction has 9875 states and 44383 transitions. [2021-06-12 20:44:40,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:44:40,158 INFO L276 IsEmpty]: Start isEmpty. Operand 9875 states and 44383 transitions. [2021-06-12 20:44:40,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:40,175 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:40,175 INFO L472 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] [2021-06-12 20:44:40,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable613,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:40,376 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:40,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:40,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1713004178, now seen corresponding path program 30 times [2021-06-12 20:44:40,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:40,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124239921] [2021-06-12 20:44:40,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:40,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:40,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124239921] [2021-06-12 20:44:40,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124239921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:40,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875431763] [2021-06-12 20:44:40,559 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 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 [2021-06-12 20:44:40,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:44:40,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:40,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:44:40,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:40,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:40,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:40,745 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 26 treesize of output 32 [2021-06-12 20:44:40,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:40,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:40,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:40,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-12 20:44:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:40,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875431763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:40,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:40,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:44:40,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41230179] [2021-06-12 20:44:40,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:44:40,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:40,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:44:40,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:44:40,929 INFO L87 Difference]: Start difference. First operand 9875 states and 44383 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:43,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:43,750 INFO L93 Difference]: Finished difference Result 11024 states and 48734 transitions. [2021-06-12 20:44:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 20:44:43,751 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 20:44:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:43,774 INFO L225 Difference]: With dead ends: 11024 [2021-06-12 20:44:43,775 INFO L226 Difference]: Without dead ends: 10736 [2021-06-12 20:44:43,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 2126.9ms TimeCoverageRelationStatistics Valid=548, Invalid=3112, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 20:44:43,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10736 states. [2021-06-12 20:44:43,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10736 to 9882. [2021-06-12 20:44:43,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9882 states, 9881 states have (on average 4.491650642647505) internal successors, (44382), 9881 states have internal predecessors, (44382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:43,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9882 states to 9882 states and 44382 transitions. [2021-06-12 20:44:43,973 INFO L78 Accepts]: Start accepts. Automaton has 9882 states and 44382 transitions. Word has length 30 [2021-06-12 20:44:43,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:43,973 INFO L482 AbstractCegarLoop]: Abstraction has 9882 states and 44382 transitions. [2021-06-12 20:44:43,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:43,973 INFO L276 IsEmpty]: Start isEmpty. Operand 9882 states and 44382 transitions. [2021-06-12 20:44:43,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:43,989 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:43,989 INFO L472 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] [2021-06-12 20:44:44,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:44,190 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:44,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:44,190 INFO L82 PathProgramCache]: Analyzing trace with hash 853505080, now seen corresponding path program 6 times [2021-06-12 20:44:44,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:44,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33178882] [2021-06-12 20:44:44,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:44,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:44,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33178882] [2021-06-12 20:44:44,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33178882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:44,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713957167] [2021-06-12 20:44:44,311 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 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 [2021-06-12 20:44:44,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:44:44,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:44,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:44:44,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:44,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:44,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:44,521 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 30 treesize of output 60 [2021-06-12 20:44:44,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:44,591 INFO L628 ElimStorePlain]: treesize reduction 5, result has 94.2 percent of original size [2021-06-12 20:44:44,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:44,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:881 [2021-06-12 20:44:44,992 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2021-06-12 20:44:45,334 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-06-12 20:44:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:45,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713957167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:45,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:45,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2021-06-12 20:44:45,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689699129] [2021-06-12 20:44:45,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:44:45,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:45,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:44:45,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:44:45,449 INFO L87 Difference]: Start difference. First operand 9882 states and 44382 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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) [2021-06-12 20:44:45,919 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2021-06-12 20:44:47,621 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-06-12 20:44:48,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:48,107 INFO L93 Difference]: Finished difference Result 11124 states and 49561 transitions. [2021-06-12 20:44:48,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:44:48,107 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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 30 [2021-06-12 20:44:48,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:48,132 INFO L225 Difference]: With dead ends: 11124 [2021-06-12 20:44:48,132 INFO L226 Difference]: Without dead ends: 10877 [2021-06-12 20:44:48,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 2166.5ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:44:48,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10877 states. [2021-06-12 20:44:48,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10877 to 9948. [2021-06-12 20:44:48,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9948 states, 9947 states have (on average 4.4993465366442145) internal successors, (44755), 9947 states have internal predecessors, (44755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:48,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9948 states to 9948 states and 44755 transitions. [2021-06-12 20:44:48,343 INFO L78 Accepts]: Start accepts. Automaton has 9948 states and 44755 transitions. Word has length 30 [2021-06-12 20:44:48,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:48,343 INFO L482 AbstractCegarLoop]: Abstraction has 9948 states and 44755 transitions. [2021-06-12 20:44:48,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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) [2021-06-12 20:44:48,343 INFO L276 IsEmpty]: Start isEmpty. Operand 9948 states and 44755 transitions. [2021-06-12 20:44:48,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:48,360 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:48,360 INFO L472 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] [2021-06-12 20:44:48,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable619 [2021-06-12 20:44:48,561 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:48,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:48,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1927988576, now seen corresponding path program 68 times [2021-06-12 20:44:48,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:48,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402595009] [2021-06-12 20:44:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:48,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:48,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402595009] [2021-06-12 20:44:48,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402595009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:48,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55718805] [2021-06-12 20:44:48,752 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 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 [2021-06-12 20:44:48,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:44:48,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:48,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:44:48,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:49,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:49,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:49,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:49,039 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 29 treesize of output 17 [2021-06-12 20:44:49,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:49,052 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-12 20:44:49,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:49,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-12 20:44:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:49,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55718805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:49,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:49,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:44:49,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919186719] [2021-06-12 20:44:49,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:49,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:49,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:49,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:49,095 INFO L87 Difference]: Start difference. First operand 9948 states and 44755 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:44:50,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:50,360 INFO L93 Difference]: Finished difference Result 10495 states and 46820 transitions. [2021-06-12 20:44:50,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:44:50,360 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:44:50,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:50,384 INFO L225 Difference]: With dead ends: 10495 [2021-06-12 20:44:50,384 INFO L226 Difference]: Without dead ends: 10355 [2021-06-12 20:44:50,384 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 763.7ms TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:44:50,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10355 states. [2021-06-12 20:44:50,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10355 to 9953. [2021-06-12 20:44:50,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9953 states, 9952 states have (on average 4.498593247588424) internal successors, (44770), 9952 states have internal predecessors, (44770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9953 states to 9953 states and 44770 transitions. [2021-06-12 20:44:50,586 INFO L78 Accepts]: Start accepts. Automaton has 9953 states and 44770 transitions. Word has length 30 [2021-06-12 20:44:50,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:50,586 INFO L482 AbstractCegarLoop]: Abstraction has 9953 states and 44770 transitions. [2021-06-12 20:44:50,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:44:50,586 INFO L276 IsEmpty]: Start isEmpty. Operand 9953 states and 44770 transitions. [2021-06-12 20:44:50,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:50,603 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:50,604 INFO L472 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] [2021-06-12 20:44:50,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable639 [2021-06-12 20:44:50,804 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:50,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:50,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1662609756, now seen corresponding path program 69 times [2021-06-12 20:44:50,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:50,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461815558] [2021-06-12 20:44:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:51,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:51,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461815558] [2021-06-12 20:44:51,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461815558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:51,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311366547] [2021-06-12 20:44:51,047 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 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 [2021-06-12 20:44:51,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:44:51,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:51,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:44:51,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:51,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:51,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:51,255 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 26 treesize of output 32 [2021-06-12 20:44:51,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:51,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:51,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:51,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:66 [2021-06-12 20:44:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:51,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311366547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:51,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:51,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:44:51,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75632165] [2021-06-12 20:44:51,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:51,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:51,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:51,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:51,474 INFO L87 Difference]: Start difference. First operand 9953 states and 44770 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-06-12 20:44:52,853 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2021-06-12 20:44:53,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:53,733 INFO L93 Difference]: Finished difference Result 10524 states and 46882 transitions. [2021-06-12 20:44:53,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:44:53,733 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 30 [2021-06-12 20:44:53,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:53,756 INFO L225 Difference]: With dead ends: 10524 [2021-06-12 20:44:53,757 INFO L226 Difference]: Without dead ends: 10361 [2021-06-12 20:44:53,757 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1742.6ms TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:44:53,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10361 states. [2021-06-12 20:44:53,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10361 to 9962. [2021-06-12 20:44:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9962 states, 9961 states have (on average 4.498443931332195) internal successors, (44809), 9961 states have internal predecessors, (44809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:53,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9962 states to 9962 states and 44809 transitions. [2021-06-12 20:44:53,950 INFO L78 Accepts]: Start accepts. Automaton has 9962 states and 44809 transitions. Word has length 30 [2021-06-12 20:44:53,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:53,950 INFO L482 AbstractCegarLoop]: Abstraction has 9962 states and 44809 transitions. [2021-06-12 20:44:53,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-06-12 20:44:53,951 INFO L276 IsEmpty]: Start isEmpty. Operand 9962 states and 44809 transitions. [2021-06-12 20:44:53,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:53,968 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:53,968 INFO L472 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] [2021-06-12 20:44:54,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable640,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:54,168 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:54,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:54,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2099600558, now seen corresponding path program 70 times [2021-06-12 20:44:54,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:54,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200917611] [2021-06-12 20:44:54,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:54,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:54,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200917611] [2021-06-12 20:44:54,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200917611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:54,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243192482] [2021-06-12 20:44:54,394 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 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 [2021-06-12 20:44:54,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:44:54,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:54,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:54,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:54,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:54,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:54,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:54,586 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 30 treesize of output 16 [2021-06-12 20:44:54,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:54,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:54,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:54,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:44:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:54,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243192482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:54,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:54,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-12 20:44:54,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493750812] [2021-06-12 20:44:54,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:44:54,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:54,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:44:54,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:44:54,625 INFO L87 Difference]: Start difference. First operand 9962 states and 44809 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:44:55,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:55,662 INFO L93 Difference]: Finished difference Result 10461 states and 46718 transitions. [2021-06-12 20:44:55,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:44:55,662 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 30 [2021-06-12 20:44:55,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:55,685 INFO L225 Difference]: With dead ends: 10461 [2021-06-12 20:44:55,685 INFO L226 Difference]: Without dead ends: 10349 [2021-06-12 20:44:55,686 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 768.1ms TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:44:55,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10349 states. [2021-06-12 20:44:55,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10349 to 9968. [2021-06-12 20:44:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9968 states, 9967 states have (on average 4.498043543694191) internal successors, (44832), 9967 states have internal predecessors, (44832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:55,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9968 states to 9968 states and 44832 transitions. [2021-06-12 20:44:55,932 INFO L78 Accepts]: Start accepts. Automaton has 9968 states and 44832 transitions. Word has length 30 [2021-06-12 20:44:55,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:55,932 INFO L482 AbstractCegarLoop]: Abstraction has 9968 states and 44832 transitions. [2021-06-12 20:44:55,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:44:55,932 INFO L276 IsEmpty]: Start isEmpty. Operand 9968 states and 44832 transitions. [2021-06-12 20:44:55,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:55,949 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:55,949 INFO L472 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] [2021-06-12 20:44:56,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-06-12 20:44:56,150 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:56,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:56,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1581275744, now seen corresponding path program 7 times [2021-06-12 20:44:56,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:56,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780043104] [2021-06-12 20:44:56,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:56,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:56,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780043104] [2021-06-12 20:44:56,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780043104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:56,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624280050] [2021-06-12 20:44:56,273 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 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 [2021-06-12 20:44:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:56,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:56,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:56,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:56,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:56,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:56,452 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 30 treesize of output 16 [2021-06-12 20:44:56,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:56,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:56,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:56,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:44:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:56,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624280050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:56,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:56,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-12 20:44:56,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648192849] [2021-06-12 20:44:56,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:44:56,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:56,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:44:56,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:44:56,491 INFO L87 Difference]: Start difference. First operand 9968 states and 44832 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-12 20:44:57,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:57,068 INFO L93 Difference]: Finished difference Result 10466 states and 46670 transitions. [2021-06-12 20:44:57,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:44:57,069 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 30 [2021-06-12 20:44:57,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:57,092 INFO L225 Difference]: With dead ends: 10466 [2021-06-12 20:44:57,092 INFO L226 Difference]: Without dead ends: 10265 [2021-06-12 20:44:57,092 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 286.0ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:44:57,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10265 states. [2021-06-12 20:44:57,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10265 to 9979. [2021-06-12 20:44:57,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9979 states, 9978 states have (on average 4.497694928843456) internal successors, (44878), 9978 states have internal predecessors, (44878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:57,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9979 states to 9979 states and 44878 transitions. [2021-06-12 20:44:57,299 INFO L78 Accepts]: Start accepts. Automaton has 9979 states and 44878 transitions. Word has length 30 [2021-06-12 20:44:57,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:57,300 INFO L482 AbstractCegarLoop]: Abstraction has 9979 states and 44878 transitions. [2021-06-12 20:44:57,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-12 20:44:57,300 INFO L276 IsEmpty]: Start isEmpty. Operand 9979 states and 44878 transitions. [2021-06-12 20:44:57,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:57,317 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:57,317 INFO L472 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, 1] [2021-06-12 20:44:57,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable646,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:57,518 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:57,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:57,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1667325488, now seen corresponding path program 70 times [2021-06-12 20:44:57,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:57,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472709411] [2021-06-12 20:44:57,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:57,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:57,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472709411] [2021-06-12 20:44:57,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472709411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:57,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996618701] [2021-06-12 20:44:57,692 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 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 [2021-06-12 20:44:57,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:44:57,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:57,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:57,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:57,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:57,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:57,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:57,881 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 30 treesize of output 16 [2021-06-12 20:44:57,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:57,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:57,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:57,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:44:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:57,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996618701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:57,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:57,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:44:57,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091580404] [2021-06-12 20:44:57,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:44:57,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:57,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:44:57,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:44:57,935 INFO L87 Difference]: Start difference. First operand 9979 states and 44878 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:58,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:58,956 INFO L93 Difference]: Finished difference Result 10368 states and 46370 transitions. [2021-06-12 20:44:58,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:44:58,957 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 20:44:58,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:58,980 INFO L225 Difference]: With dead ends: 10368 [2021-06-12 20:44:58,980 INFO L226 Difference]: Without dead ends: 10270 [2021-06-12 20:44:58,980 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 613.3ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:44:58,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10270 states. [2021-06-12 20:44:59,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10270 to 9991. [2021-06-12 20:44:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9991 states, 9990 states have (on average 4.497097097097097) internal successors, (44926), 9990 states have internal predecessors, (44926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:59,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9991 states to 9991 states and 44926 transitions. [2021-06-12 20:44:59,183 INFO L78 Accepts]: Start accepts. Automaton has 9991 states and 44926 transitions. Word has length 30 [2021-06-12 20:44:59,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:59,183 INFO L482 AbstractCegarLoop]: Abstraction has 9991 states and 44926 transitions. [2021-06-12 20:44:59,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:59,183 INFO L276 IsEmpty]: Start isEmpty. Operand 9991 states and 44926 transitions. [2021-06-12 20:44:59,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:44:59,200 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:59,201 INFO L472 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, 1] [2021-06-12 20:44:59,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:59,401 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:44:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:59,401 INFO L82 PathProgramCache]: Analyzing trace with hash -2007157742, now seen corresponding path program 71 times [2021-06-12 20:44:59,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:59,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999941671] [2021-06-12 20:44:59,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:59,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:59,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999941671] [2021-06-12 20:44:59,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999941671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:59,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938313175] [2021-06-12 20:44:59,572 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 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 [2021-06-12 20:44:59,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:44:59,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:59,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:59,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:59,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:59,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:59,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:59,765 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 30 treesize of output 16 [2021-06-12 20:44:59,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:59,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:59,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:59,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:44:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:59,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938313175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:59,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:59,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-12 20:44:59,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27969534] [2021-06-12 20:44:59,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:44:59,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:59,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:44:59,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:44:59,815 INFO L87 Difference]: Start difference. First operand 9991 states and 44926 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2021-06-12 20:45:00,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:00,589 INFO L93 Difference]: Finished difference Result 10340 states and 46242 transitions. [2021-06-12 20:45:00,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:45:00,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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 30 [2021-06-12 20:45:00,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:00,614 INFO L225 Difference]: With dead ends: 10340 [2021-06-12 20:45:00,614 INFO L226 Difference]: Without dead ends: 10248 [2021-06-12 20:45:00,614 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 531.2ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:45:00,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10248 states. [2021-06-12 20:45:00,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10248 to 9988. [2021-06-12 20:45:00,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9988 states, 9987 states have (on average 4.49674576950035) internal successors, (44909), 9987 states have internal predecessors, (44909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9988 states to 9988 states and 44909 transitions. [2021-06-12 20:45:00,822 INFO L78 Accepts]: Start accepts. Automaton has 9988 states and 44909 transitions. Word has length 30 [2021-06-12 20:45:00,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:00,822 INFO L482 AbstractCegarLoop]: Abstraction has 9988 states and 44909 transitions. [2021-06-12 20:45:00,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2021-06-12 20:45:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 9988 states and 44909 transitions. [2021-06-12 20:45:00,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:00,840 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:00,840 INFO L472 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, 1] [2021-06-12 20:45:01,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:01,040 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:01,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:01,040 INFO L82 PathProgramCache]: Analyzing trace with hash 353883056, now seen corresponding path program 72 times [2021-06-12 20:45:01,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:01,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933067567] [2021-06-12 20:45:01,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:01,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:01,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933067567] [2021-06-12 20:45:01,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933067567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:01,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913951550] [2021-06-12 20:45:01,236 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 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 [2021-06-12 20:45:01,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:45:01,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:01,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:45:01,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:01,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:01,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:01,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:01,619 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 29 treesize of output 17 [2021-06-12 20:45:01,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:01,633 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-12 20:45:01,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:01,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-12 20:45:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:01,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913951550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:01,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:01,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:45:01,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144345333] [2021-06-12 20:45:01,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:45:01,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:01,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:45:01,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:45:01,677 INFO L87 Difference]: Start difference. First operand 9988 states and 44909 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:45:02,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:02,858 INFO L93 Difference]: Finished difference Result 10601 states and 47254 transitions. [2021-06-12 20:45:02,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:45:02,859 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:45:02,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:02,883 INFO L225 Difference]: With dead ends: 10601 [2021-06-12 20:45:02,883 INFO L226 Difference]: Without dead ends: 10487 [2021-06-12 20:45:02,883 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 822.3ms TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:45:02,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10487 states. [2021-06-12 20:45:03,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10487 to 9987. [2021-06-12 20:45:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9987 states, 9986 states have (on average 4.496895653915482) internal successors, (44906), 9986 states have internal predecessors, (44906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:03,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9987 states to 9987 states and 44906 transitions. [2021-06-12 20:45:03,090 INFO L78 Accepts]: Start accepts. Automaton has 9987 states and 44906 transitions. Word has length 30 [2021-06-12 20:45:03,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:03,090 INFO L482 AbstractCegarLoop]: Abstraction has 9987 states and 44906 transitions. [2021-06-12 20:45:03,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:45:03,091 INFO L276 IsEmpty]: Start isEmpty. Operand 9987 states and 44906 transitions. [2021-06-12 20:45:03,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:03,108 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:03,108 INFO L472 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] [2021-06-12 20:45:03,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable649 [2021-06-12 20:45:03,309 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:03,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:03,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1932960114, now seen corresponding path program 71 times [2021-06-12 20:45:03,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:03,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797834724] [2021-06-12 20:45:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:03,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:03,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797834724] [2021-06-12 20:45:03,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797834724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:03,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59968418] [2021-06-12 20:45:03,501 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 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 [2021-06-12 20:45:03,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:45:03,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:03,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:03,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:03,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:03,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:03,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:03,738 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 22 treesize of output 12 [2021-06-12 20:45:03,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:03,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:03,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:03,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-06-12 20:45:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:03,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59968418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:03,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:03,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:45:03,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615024092] [2021-06-12 20:45:03,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:03,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:03,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:03,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:03,785 INFO L87 Difference]: Start difference. First operand 9987 states and 44906 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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) [2021-06-12 20:45:05,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:05,350 INFO L93 Difference]: Finished difference Result 10924 states and 48598 transitions. [2021-06-12 20:45:05,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:45:05,350 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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 30 [2021-06-12 20:45:05,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:05,374 INFO L225 Difference]: With dead ends: 10924 [2021-06-12 20:45:05,374 INFO L226 Difference]: Without dead ends: 10819 [2021-06-12 20:45:05,375 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 950.5ms TimeCoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:45:05,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10819 states. [2021-06-12 20:45:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10819 to 9995. [2021-06-12 20:45:05,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9995 states, 9994 states have (on average 4.496698018811287) internal successors, (44940), 9994 states have internal predecessors, (44940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:05,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9995 states to 9995 states and 44940 transitions. [2021-06-12 20:45:05,590 INFO L78 Accepts]: Start accepts. Automaton has 9995 states and 44940 transitions. Word has length 30 [2021-06-12 20:45:05,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:05,590 INFO L482 AbstractCegarLoop]: Abstraction has 9995 states and 44940 transitions. [2021-06-12 20:45:05,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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) [2021-06-12 20:45:05,590 INFO L276 IsEmpty]: Start isEmpty. Operand 9995 states and 44940 transitions. [2021-06-12 20:45:05,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:05,608 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:05,608 INFO L472 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, 1] [2021-06-12 20:45:05,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-06-12 20:45:05,808 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:05,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:05,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1222660956, now seen corresponding path program 73 times [2021-06-12 20:45:05,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:05,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771838631] [2021-06-12 20:45:05,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:06,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:06,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771838631] [2021-06-12 20:45:06,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771838631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:06,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192555163] [2021-06-12 20:45:06,002 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 [2021-06-12 20:45:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:06,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:06,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:06,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:06,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:06,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:06,203 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 29 treesize of output 15 [2021-06-12 20:45:06,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:06,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:06,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:06,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-12 20:45:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:06,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192555163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:06,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:06,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:45:06,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212355919] [2021-06-12 20:45:06,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:45:06,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:06,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:45:06,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:45:06,239 INFO L87 Difference]: Start difference. First operand 9995 states and 44940 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:45:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:07,231 INFO L93 Difference]: Finished difference Result 10951 states and 48605 transitions. [2021-06-12 20:45:07,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:45:07,231 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 30 [2021-06-12 20:45:07,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:07,256 INFO L225 Difference]: With dead ends: 10951 [2021-06-12 20:45:07,257 INFO L226 Difference]: Without dead ends: 10843 [2021-06-12 20:45:07,257 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 666.0ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:45:07,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10843 states. [2021-06-12 20:45:07,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10843 to 10009. [2021-06-12 20:45:07,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10009 states, 10008 states have (on average 4.496302957633893) internal successors, (44999), 10008 states have internal predecessors, (44999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:07,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10009 states to 10009 states and 44999 transitions. [2021-06-12 20:45:07,550 INFO L78 Accepts]: Start accepts. Automaton has 10009 states and 44999 transitions. Word has length 30 [2021-06-12 20:45:07,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:07,550 INFO L482 AbstractCegarLoop]: Abstraction has 10009 states and 44999 transitions. [2021-06-12 20:45:07,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:45:07,550 INFO L276 IsEmpty]: Start isEmpty. Operand 10009 states and 44999 transitions. [2021-06-12 20:45:07,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:07,568 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:07,568 INFO L472 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] [2021-06-12 20:45:07,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-06-12 20:45:07,769 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:07,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:07,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1068030562, now seen corresponding path program 72 times [2021-06-12 20:45:07,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:07,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671222997] [2021-06-12 20:45:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:07,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:07,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671222997] [2021-06-12 20:45:07,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671222997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:07,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756693670] [2021-06-12 20:45:07,966 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 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 [2021-06-12 20:45:08,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:45:08,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:08,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:45:08,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:08,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:08,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:08,180 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 22 treesize of output 56 [2021-06-12 20:45:08,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:45:08,312 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-12 20:45:08,312 INFO L628 ElimStorePlain]: treesize reduction 64, result has 54.6 percent of original size [2021-06-12 20:45:08,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:08,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:77 [2021-06-12 20:45:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:08,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756693670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:08,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:08,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:45:08,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889120619] [2021-06-12 20:45:08,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:45:08,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:08,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:45:08,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:45:08,578 INFO L87 Difference]: Start difference. First operand 10009 states and 44999 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:45:09,251 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-12 20:45:12,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:12,037 INFO L93 Difference]: Finished difference Result 11203 states and 49540 transitions. [2021-06-12 20:45:12,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 20:45:12,038 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-06-12 20:45:12,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:12,064 INFO L225 Difference]: With dead ends: 11203 [2021-06-12 20:45:12,065 INFO L226 Difference]: Without dead ends: 10979 [2021-06-12 20:45:12,065 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2520.4ms TimeCoverageRelationStatistics Valid=372, Invalid=3660, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 20:45:12,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2021-06-12 20:45:12,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 10005. [2021-06-12 20:45:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 4.49640143942423) internal successors, (44982), 10004 states have internal predecessors, (44982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:12,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 44982 transitions. [2021-06-12 20:45:12,288 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 44982 transitions. Word has length 30 [2021-06-12 20:45:12,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:12,288 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 44982 transitions. [2021-06-12 20:45:12,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:45:12,288 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 44982 transitions. [2021-06-12 20:45:12,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:12,308 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:12,308 INFO L472 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] [2021-06-12 20:45:12,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-06-12 20:45:12,509 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:12,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1222272674, now seen corresponding path program 73 times [2021-06-12 20:45:12,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:12,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829136082] [2021-06-12 20:45:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:12,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:12,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829136082] [2021-06-12 20:45:12,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829136082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:12,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252737695] [2021-06-12 20:45:12,700 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 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 [2021-06-12 20:45:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:12,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:12,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:12,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:12,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:12,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:12,887 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 20:45:12,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:12,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:12,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:12,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:45:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:12,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252737695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:12,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:12,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-12 20:45:12,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957085605] [2021-06-12 20:45:12,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:45:12,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:12,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:45:12,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:45:12,927 INFO L87 Difference]: Start difference. First operand 10005 states and 44982 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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) [2021-06-12 20:45:13,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:13,859 INFO L93 Difference]: Finished difference Result 10674 states and 47572 transitions. [2021-06-12 20:45:13,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:45:13,859 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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 30 [2021-06-12 20:45:13,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:13,884 INFO L225 Difference]: With dead ends: 10674 [2021-06-12 20:45:13,884 INFO L226 Difference]: Without dead ends: 10569 [2021-06-12 20:45:13,884 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 698.7ms TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:45:13,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10569 states. [2021-06-12 20:45:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10569 to 10010. [2021-06-12 20:45:14,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10010 states, 10009 states have (on average 4.496253371965231) internal successors, (45003), 10009 states have internal predecessors, (45003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10010 states to 10010 states and 45003 transitions. [2021-06-12 20:45:14,164 INFO L78 Accepts]: Start accepts. Automaton has 10010 states and 45003 transitions. Word has length 30 [2021-06-12 20:45:14,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:14,164 INFO L482 AbstractCegarLoop]: Abstraction has 10010 states and 45003 transitions. [2021-06-12 20:45:14,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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) [2021-06-12 20:45:14,164 INFO L276 IsEmpty]: Start isEmpty. Operand 10010 states and 45003 transitions. [2021-06-12 20:45:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:14,182 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:14,182 INFO L472 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] [2021-06-12 20:45:14,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:14,383 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:14,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:14,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1460216054, now seen corresponding path program 74 times [2021-06-12 20:45:14,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:14,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706628954] [2021-06-12 20:45:14,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:14,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:14,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706628954] [2021-06-12 20:45:14,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706628954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:14,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195000766] [2021-06-12 20:45:14,574 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 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 [2021-06-12 20:45:14,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:45:14,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:14,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:45:14,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:14,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:14,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:14,773 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-12 20:45:14,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:14,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:14,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:14,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-12 20:45:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:14,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195000766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:14,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:14,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:45:14,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828507076] [2021-06-12 20:45:14,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:14,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:14,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:14,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:14,962 INFO L87 Difference]: Start difference. First operand 10010 states and 45003 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:17,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:17,128 INFO L93 Difference]: Finished difference Result 10729 states and 47706 transitions. [2021-06-12 20:45:17,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:45:17,129 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 20:45:17,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:17,153 INFO L225 Difference]: With dead ends: 10729 [2021-06-12 20:45:17,153 INFO L226 Difference]: Without dead ends: 10577 [2021-06-12 20:45:17,153 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1497.4ms TimeCoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:45:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10577 states. [2021-06-12 20:45:17,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10577 to 10007. [2021-06-12 20:45:17,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10007 states, 10006 states have (on average 4.495802518488906) internal successors, (44985), 10006 states have internal predecessors, (44985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10007 states to 10007 states and 44985 transitions. [2021-06-12 20:45:17,417 INFO L78 Accepts]: Start accepts. Automaton has 10007 states and 44985 transitions. Word has length 30 [2021-06-12 20:45:17,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:17,417 INFO L482 AbstractCegarLoop]: Abstraction has 10007 states and 44985 transitions. [2021-06-12 20:45:17,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:17,417 INFO L276 IsEmpty]: Start isEmpty. Operand 10007 states and 44985 transitions. [2021-06-12 20:45:17,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:17,435 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:17,435 INFO L472 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, 1] [2021-06-12 20:45:17,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-06-12 20:45:17,636 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:17,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:17,636 INFO L82 PathProgramCache]: Analyzing trace with hash 603104802, now seen corresponding path program 74 times [2021-06-12 20:45:17,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:17,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196349818] [2021-06-12 20:45:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:17,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:17,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196349818] [2021-06-12 20:45:17,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196349818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:17,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432825597] [2021-06-12 20:45:17,843 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 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 [2021-06-12 20:45:17,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:45:17,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:17,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:45:17,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:18,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:18,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:18,032 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 26 treesize of output 32 [2021-06-12 20:45:18,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:18,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:18,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:18,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-12 20:45:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:18,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432825597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:18,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:18,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:45:18,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995647261] [2021-06-12 20:45:18,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:45:18,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:18,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:45:18,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:45:18,178 INFO L87 Difference]: Start difference. First operand 10007 states and 44985 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:45:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:20,730 INFO L93 Difference]: Finished difference Result 12378 states and 54172 transitions. [2021-06-12 20:45:20,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 20:45:20,731 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 30 [2021-06-12 20:45:20,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:20,758 INFO L225 Difference]: With dead ends: 12378 [2021-06-12 20:45:20,758 INFO L226 Difference]: Without dead ends: 12258 [2021-06-12 20:45:20,759 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1606.0ms TimeCoverageRelationStatistics Valid=402, Invalid=2568, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:45:20,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12258 states. [2021-06-12 20:45:20,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12258 to 10041. [2021-06-12 20:45:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10041 states, 10040 states have (on average 4.496812749003984) internal successors, (45148), 10040 states have internal predecessors, (45148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:20,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10041 states to 10041 states and 45148 transitions. [2021-06-12 20:45:20,987 INFO L78 Accepts]: Start accepts. Automaton has 10041 states and 45148 transitions. Word has length 30 [2021-06-12 20:45:20,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:20,987 INFO L482 AbstractCegarLoop]: Abstraction has 10041 states and 45148 transitions. [2021-06-12 20:45:20,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:45:20,987 INFO L276 IsEmpty]: Start isEmpty. Operand 10041 states and 45148 transitions. [2021-06-12 20:45:21,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:21,005 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:21,005 INFO L472 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, 1] [2021-06-12 20:45:21,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-06-12 20:45:21,205 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:21,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:21,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1925833962, now seen corresponding path program 75 times [2021-06-12 20:45:21,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:21,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516145198] [2021-06-12 20:45:21,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:21,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:21,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516145198] [2021-06-12 20:45:21,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516145198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:21,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920643279] [2021-06-12 20:45:21,393 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 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 [2021-06-12 20:45:21,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:45:21,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:21,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:45:21,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:21,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:21,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:21,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:21,587 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 30 treesize of output 34 [2021-06-12 20:45:21,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:21,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:21,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:21,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:92 [2021-06-12 20:45:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:21,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920643279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:21,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:21,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:45:21,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947448911] [2021-06-12 20:45:21,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:21,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:21,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:21,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:21,801 INFO L87 Difference]: Start difference. First operand 10041 states and 45148 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-06-12 20:45:25,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:25,624 INFO L93 Difference]: Finished difference Result 12725 states and 55200 transitions. [2021-06-12 20:45:25,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 20:45:25,624 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 30 [2021-06-12 20:45:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:25,653 INFO L225 Difference]: With dead ends: 12725 [2021-06-12 20:45:25,654 INFO L226 Difference]: Without dead ends: 12492 [2021-06-12 20:45:25,654 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 2536.2ms TimeCoverageRelationStatistics Valid=599, Invalid=4093, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 20:45:25,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12492 states. [2021-06-12 20:45:25,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12492 to 10045. [2021-06-12 20:45:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10045 states, 10044 states have (on average 4.495221027479092) internal successors, (45150), 10044 states have internal predecessors, (45150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10045 states to 10045 states and 45150 transitions. [2021-06-12 20:45:25,879 INFO L78 Accepts]: Start accepts. Automaton has 10045 states and 45150 transitions. Word has length 30 [2021-06-12 20:45:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:25,880 INFO L482 AbstractCegarLoop]: Abstraction has 10045 states and 45150 transitions. [2021-06-12 20:45:25,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-06-12 20:45:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 10045 states and 45150 transitions. [2021-06-12 20:45:25,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:25,897 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:25,897 INFO L472 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] [2021-06-12 20:45:26,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:26,097 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:26,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:26,098 INFO L82 PathProgramCache]: Analyzing trace with hash -726234836, now seen corresponding path program 31 times [2021-06-12 20:45:26,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:26,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97650603] [2021-06-12 20:45:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:26,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:26,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97650603] [2021-06-12 20:45:26,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97650603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:26,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739978531] [2021-06-12 20:45:26,308 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 [2021-06-12 20:45:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:26,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:26,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:26,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:26,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:26,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:26,494 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 30 treesize of output 16 [2021-06-12 20:45:26,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:26,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:26,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:26,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:45:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:26,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739978531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:26,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:26,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:45:26,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316343171] [2021-06-12 20:45:26,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:45:26,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:26,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:45:26,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:45:26,639 INFO L87 Difference]: Start difference. First operand 10045 states and 45150 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:45:28,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:28,222 INFO L93 Difference]: Finished difference Result 10659 states and 47531 transitions. [2021-06-12 20:45:28,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:45:28,222 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 30 [2021-06-12 20:45:28,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:28,247 INFO L225 Difference]: With dead ends: 10659 [2021-06-12 20:45:28,247 INFO L226 Difference]: Without dead ends: 10545 [2021-06-12 20:45:28,247 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1213.8ms TimeCoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:45:28,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10545 states. [2021-06-12 20:45:28,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10545 to 10063. [2021-06-12 20:45:28,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10063 states, 10062 states have (on average 4.494633273703041) internal successors, (45225), 10062 states have internal predecessors, (45225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10063 states to 10063 states and 45225 transitions. [2021-06-12 20:45:28,452 INFO L78 Accepts]: Start accepts. Automaton has 10063 states and 45225 transitions. Word has length 30 [2021-06-12 20:45:28,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:28,452 INFO L482 AbstractCegarLoop]: Abstraction has 10063 states and 45225 transitions. [2021-06-12 20:45:28,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:45:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 10063 states and 45225 transitions. [2021-06-12 20:45:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:28,469 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:28,469 INFO L472 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] [2021-06-12 20:45:28,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2021-06-12 20:45:28,670 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:28,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:28,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1039761232, now seen corresponding path program 32 times [2021-06-12 20:45:28,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:28,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766237432] [2021-06-12 20:45:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:28,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:28,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766237432] [2021-06-12 20:45:28,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766237432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:28,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955194083] [2021-06-12 20:45:28,882 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 [2021-06-12 20:45:28,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:45:28,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:28,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:45:28,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:29,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:29,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:29,084 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 26 treesize of output 32 [2021-06-12 20:45:29,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:29,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:29,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:29,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:66 [2021-06-12 20:45:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:29,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955194083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:29,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:29,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:45:29,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944729983] [2021-06-12 20:45:29,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:29,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:29,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:29,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:29,320 INFO L87 Difference]: Start difference. First operand 10063 states and 45225 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:29,713 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-06-12 20:45:31,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:31,701 INFO L93 Difference]: Finished difference Result 10974 states and 48573 transitions. [2021-06-12 20:45:31,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:45:31,701 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 20:45:31,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:31,725 INFO L225 Difference]: With dead ends: 10974 [2021-06-12 20:45:31,726 INFO L226 Difference]: Without dead ends: 10651 [2021-06-12 20:45:31,726 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1998.6ms TimeCoverageRelationStatistics Valid=438, Invalid=2424, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:45:31,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10651 states. [2021-06-12 20:45:31,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10651 to 10076. [2021-06-12 20:45:31,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 4.49409429280397) internal successors, (45278), 10075 states have internal predecessors, (45278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 45278 transitions. [2021-06-12 20:45:31,928 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 45278 transitions. Word has length 30 [2021-06-12 20:45:31,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:31,928 INFO L482 AbstractCegarLoop]: Abstraction has 10076 states and 45278 transitions. [2021-06-12 20:45:31,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:31,928 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 45278 transitions. [2021-06-12 20:45:31,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:31,945 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:31,945 INFO L472 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] [2021-06-12 20:45:32,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable679 [2021-06-12 20:45:32,145 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:32,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:32,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1146174864, now seen corresponding path program 75 times [2021-06-12 20:45:32,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:32,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269711030] [2021-06-12 20:45:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:32,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:32,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269711030] [2021-06-12 20:45:32,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269711030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:32,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409878731] [2021-06-12 20:45:32,358 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 [2021-06-12 20:45:32,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:45:32,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:32,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:32,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:32,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:32,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:32,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:32,661 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 33 treesize of output 17 [2021-06-12 20:45:32,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:32,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:32,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:32,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-12 20:45:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:32,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409878731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:32,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:32,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:45:32,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317024223] [2021-06-12 20:45:32,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:32,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:32,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:32,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:32,712 INFO L87 Difference]: Start difference. First operand 10076 states and 45278 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:45:33,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:33,895 INFO L93 Difference]: Finished difference Result 10655 states and 47486 transitions. [2021-06-12 20:45:33,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:45:33,895 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-06-12 20:45:33,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:33,920 INFO L225 Difference]: With dead ends: 10655 [2021-06-12 20:45:33,920 INFO L226 Difference]: Without dead ends: 10524 [2021-06-12 20:45:33,920 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 882.1ms TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:45:33,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10524 states. [2021-06-12 20:45:34,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10524 to 10076. [2021-06-12 20:45:34,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 4.493697270471464) internal successors, (45274), 10075 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) [2021-06-12 20:45:34,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 45274 transitions. [2021-06-12 20:45:34,124 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 45274 transitions. Word has length 30 [2021-06-12 20:45:34,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:34,124 INFO L482 AbstractCegarLoop]: Abstraction has 10076 states and 45274 transitions. [2021-06-12 20:45:34,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:45:34,124 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 45274 transitions. [2021-06-12 20:45:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:34,142 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:34,142 INFO L472 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] [2021-06-12 20:45:34,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable684 [2021-06-12 20:45:34,343 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:34,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:34,343 INFO L82 PathProgramCache]: Analyzing trace with hash -441805900, now seen corresponding path program 76 times [2021-06-12 20:45:34,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:34,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706446497] [2021-06-12 20:45:34,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:34,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:34,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:34,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706446497] [2021-06-12 20:45:34,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706446497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:34,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95747672] [2021-06-12 20:45:34,583 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 [2021-06-12 20:45:34,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:45:34,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:34,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:34,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:34,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:34,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:34,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:34,789 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 30 treesize of output 16 [2021-06-12 20:45:34,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:34,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:34,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:34,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:45:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:34,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95747672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:34,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:34,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-12 20:45:34,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794607940] [2021-06-12 20:45:34,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:45:34,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:34,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:45:34,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:45:34,848 INFO L87 Difference]: Start difference. First operand 10076 states and 45274 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:45:36,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:36,204 INFO L93 Difference]: Finished difference Result 10582 states and 47190 transitions. [2021-06-12 20:45:36,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:45:36,205 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 30 [2021-06-12 20:45:36,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:36,228 INFO L225 Difference]: With dead ends: 10582 [2021-06-12 20:45:36,228 INFO L226 Difference]: Without dead ends: 10467 [2021-06-12 20:45:36,228 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 962.2ms TimeCoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:45:36,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10467 states. [2021-06-12 20:45:36,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10467 to 10080. [2021-06-12 20:45:36,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10080 states, 10079 states have (on average 4.4936005556106755) internal successors, (45291), 10079 states have internal predecessors, (45291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:36,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10080 states to 10080 states and 45291 transitions. [2021-06-12 20:45:36,423 INFO L78 Accepts]: Start accepts. Automaton has 10080 states and 45291 transitions. Word has length 30 [2021-06-12 20:45:36,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:36,423 INFO L482 AbstractCegarLoop]: Abstraction has 10080 states and 45291 transitions. [2021-06-12 20:45:36,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:45:36,424 INFO L276 IsEmpty]: Start isEmpty. Operand 10080 states and 45291 transitions. [2021-06-12 20:45:36,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:36,440 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:36,440 INFO L472 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] [2021-06-12 20:45:36,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-06-12 20:45:36,641 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:36,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:36,641 INFO L82 PathProgramCache]: Analyzing trace with hash -974562882, now seen corresponding path program 77 times [2021-06-12 20:45:36,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:36,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971958859] [2021-06-12 20:45:36,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:36,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:36,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971958859] [2021-06-12 20:45:36,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971958859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:36,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095272604] [2021-06-12 20:45:36,866 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 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 [2021-06-12 20:45:36,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:45:36,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:36,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:36,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:37,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:37,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:37,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:37,092 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 23 treesize of output 13 [2021-06-12 20:45:37,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:37,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:37,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:37,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:7 [2021-06-12 20:45:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:37,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095272604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:37,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:37,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-12 20:45:37,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345577367] [2021-06-12 20:45:37,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:37,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:37,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:37,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:37,141 INFO L87 Difference]: Start difference. First operand 10080 states and 45291 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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) [2021-06-12 20:45:38,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:38,387 INFO L93 Difference]: Finished difference Result 10379 states and 46374 transitions. [2021-06-12 20:45:38,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:45:38,387 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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 30 [2021-06-12 20:45:38,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:38,411 INFO L225 Difference]: With dead ends: 10379 [2021-06-12 20:45:38,411 INFO L226 Difference]: Without dead ends: 10320 [2021-06-12 20:45:38,411 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 873.7ms TimeCoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:45:38,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10320 states. [2021-06-12 20:45:38,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10320 to 10080. [2021-06-12 20:45:38,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10080 states, 10079 states have (on average 4.493501339418593) internal successors, (45290), 10079 states have internal predecessors, (45290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10080 states to 10080 states and 45290 transitions. [2021-06-12 20:45:38,610 INFO L78 Accepts]: Start accepts. Automaton has 10080 states and 45290 transitions. Word has length 30 [2021-06-12 20:45:38,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:38,610 INFO L482 AbstractCegarLoop]: Abstraction has 10080 states and 45290 transitions. [2021-06-12 20:45:38,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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) [2021-06-12 20:45:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand 10080 states and 45290 transitions. [2021-06-12 20:45:38,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:38,628 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:38,628 INFO L472 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] [2021-06-12 20:45:38,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-06-12 20:45:38,829 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:38,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:38,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1704808642, now seen corresponding path program 78 times [2021-06-12 20:45:38,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:38,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742614898] [2021-06-12 20:45:38,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:39,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:39,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742614898] [2021-06-12 20:45:39,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742614898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:39,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897539903] [2021-06-12 20:45:39,117 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 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 [2021-06-12 20:45:39,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:45:39,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:39,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:45:39,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:39,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:39,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:39,333 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 23 treesize of output 57 [2021-06-12 20:45:39,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:39,380 INFO L628 ElimStorePlain]: treesize reduction 5, result has 92.2 percent of original size [2021-06-12 20:45:39,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:39,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:469 [2021-06-12 20:45:39,579 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-06-12 20:45:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:39,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897539903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:39,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:39,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:45:39,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552052871] [2021-06-12 20:45:39,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:45:39,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:39,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:45:39,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:45:39,892 INFO L87 Difference]: Start difference. First operand 10080 states and 45290 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:45:41,435 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-12 20:45:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:42,388 INFO L93 Difference]: Finished difference Result 11125 states and 49250 transitions. [2021-06-12 20:45:42,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:45:42,389 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-06-12 20:45:42,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:42,414 INFO L225 Difference]: With dead ends: 11125 [2021-06-12 20:45:42,414 INFO L226 Difference]: Without dead ends: 11002 [2021-06-12 20:45:42,414 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1901.0ms TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:45:42,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11002 states. [2021-06-12 20:45:42,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11002 to 10117. [2021-06-12 20:45:42,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10117 states, 10116 states have (on average 4.487643337287466) internal successors, (45397), 10116 states have internal predecessors, (45397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:42,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10117 states to 10117 states and 45397 transitions. [2021-06-12 20:45:42,628 INFO L78 Accepts]: Start accepts. Automaton has 10117 states and 45397 transitions. Word has length 30 [2021-06-12 20:45:42,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:42,628 INFO L482 AbstractCegarLoop]: Abstraction has 10117 states and 45397 transitions. [2021-06-12 20:45:42,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:45:42,628 INFO L276 IsEmpty]: Start isEmpty. Operand 10117 states and 45397 transitions. [2021-06-12 20:45:42,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:42,646 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:42,646 INFO L472 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] [2021-06-12 20:45:42,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-06-12 20:45:42,847 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:42,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:42,847 INFO L82 PathProgramCache]: Analyzing trace with hash 211398642, now seen corresponding path program 79 times [2021-06-12 20:45:42,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:42,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158424973] [2021-06-12 20:45:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:43,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:43,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158424973] [2021-06-12 20:45:43,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158424973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:43,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422751745] [2021-06-12 20:45:43,075 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 [2021-06-12 20:45:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:43,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:43,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:43,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:43,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:43,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:43,261 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 30 treesize of output 16 [2021-06-12 20:45:43,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:43,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:43,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:43,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:45:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:43,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422751745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:43,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:43,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:45:43,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074526094] [2021-06-12 20:45:43,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:45:43,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:43,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:45:43,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:45:43,333 INFO L87 Difference]: Start difference. First operand 10117 states and 45397 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:45:44,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:44,452 INFO L93 Difference]: Finished difference Result 10617 states and 47296 transitions. [2021-06-12 20:45:44,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:45:44,453 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 30 [2021-06-12 20:45:44,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:44,477 INFO L225 Difference]: With dead ends: 10617 [2021-06-12 20:45:44,477 INFO L226 Difference]: Without dead ends: 10467 [2021-06-12 20:45:44,477 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 924.2ms TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:45:44,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10467 states. [2021-06-12 20:45:44,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10467 to 10080. [2021-06-12 20:45:44,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10080 states, 10079 states have (on average 4.493104474650263) internal successors, (45286), 10079 states have internal predecessors, (45286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:44,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10080 states to 10080 states and 45286 transitions. [2021-06-12 20:45:44,693 INFO L78 Accepts]: Start accepts. Automaton has 10080 states and 45286 transitions. Word has length 30 [2021-06-12 20:45:44,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:44,693 INFO L482 AbstractCegarLoop]: Abstraction has 10080 states and 45286 transitions. [2021-06-12 20:45:44,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:45:44,693 INFO L276 IsEmpty]: Start isEmpty. Operand 10080 states and 45286 transitions. [2021-06-12 20:45:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:44,711 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:44,711 INFO L472 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] [2021-06-12 20:45:44,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable704,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:44,911 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:44,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:44,912 INFO L82 PathProgramCache]: Analyzing trace with hash 740206354, now seen corresponding path program 33 times [2021-06-12 20:45:44,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:44,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184516664] [2021-06-12 20:45:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:45,106 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-06-12 20:45:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:45,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:45,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184516664] [2021-06-12 20:45:45,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184516664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:45,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061362096] [2021-06-12 20:45:45,209 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 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 [2021-06-12 20:45:45,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:45:45,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:45,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:45:45,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:45,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:45,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:45,430 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-06-12 20:45:45,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:45:45,472 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.9 percent of original size [2021-06-12 20:45:45,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:45:45,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:80 [2021-06-12 20:45:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:45,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061362096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:45,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:45,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:45:45,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877298623] [2021-06-12 20:45:45,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:45,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:45,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:45,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:45,617 INFO L87 Difference]: Start difference. First operand 10080 states and 45286 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:47,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:47,718 INFO L93 Difference]: Finished difference Result 11112 states and 49126 transitions. [2021-06-12 20:45:47,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:45:47,719 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 20:45:47,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:47,743 INFO L225 Difference]: With dead ends: 11112 [2021-06-12 20:45:47,743 INFO L226 Difference]: Without dead ends: 10830 [2021-06-12 20:45:47,743 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1666.1ms TimeCoverageRelationStatistics Valid=345, Invalid=2007, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:45:47,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10830 states. [2021-06-12 20:45:47,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10830 to 10099. [2021-06-12 20:45:47,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10099 states, 10098 states have (on average 4.492572786690434) internal successors, (45366), 10098 states have internal predecessors, (45366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:48,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10099 states to 10099 states and 45366 transitions. [2021-06-12 20:45:48,017 INFO L78 Accepts]: Start accepts. Automaton has 10099 states and 45366 transitions. Word has length 30 [2021-06-12 20:45:48,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:48,017 INFO L482 AbstractCegarLoop]: Abstraction has 10099 states and 45366 transitions. [2021-06-12 20:45:48,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:48,017 INFO L276 IsEmpty]: Start isEmpty. Operand 10099 states and 45366 transitions. [2021-06-12 20:45:48,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:48,034 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:48,034 INFO L472 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] [2021-06-12 20:45:48,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable705 [2021-06-12 20:45:48,235 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:48,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:48,235 INFO L82 PathProgramCache]: Analyzing trace with hash -824776834, now seen corresponding path program 80 times [2021-06-12 20:45:48,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:48,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141788199] [2021-06-12 20:45:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:48,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:48,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141788199] [2021-06-12 20:45:48,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141788199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:48,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325825954] [2021-06-12 20:45:48,427 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 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 [2021-06-12 20:45:48,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:45:48,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:48,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:45:48,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:48,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:48,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:48,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:48,732 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 29 treesize of output 17 [2021-06-12 20:45:48,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:48,746 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-12 20:45:48,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:48,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-12 20:45:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:48,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325825954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:48,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:48,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:45:48,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132849284] [2021-06-12 20:45:48,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:45:48,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:48,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:45:48,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:45:48,791 INFO L87 Difference]: Start difference. First operand 10099 states and 45366 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:45:49,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:49,922 INFO L93 Difference]: Finished difference Result 10648 states and 47418 transitions. [2021-06-12 20:45:49,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:45:49,922 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:45:49,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:49,945 INFO L225 Difference]: With dead ends: 10648 [2021-06-12 20:45:49,946 INFO L226 Difference]: Without dead ends: 10501 [2021-06-12 20:45:49,946 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 693.2ms TimeCoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:45:49,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10501 states. [2021-06-12 20:45:50,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10501 to 10099. [2021-06-12 20:45:50,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10099 states, 10098 states have (on average 4.491483462071697) internal successors, (45355), 10098 states have internal predecessors, (45355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:50,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10099 states to 10099 states and 45355 transitions. [2021-06-12 20:45:50,151 INFO L78 Accepts]: Start accepts. Automaton has 10099 states and 45355 transitions. Word has length 30 [2021-06-12 20:45:50,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:50,151 INFO L482 AbstractCegarLoop]: Abstraction has 10099 states and 45355 transitions. [2021-06-12 20:45:50,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:45:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand 10099 states and 45355 transitions. [2021-06-12 20:45:50,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:50,169 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:50,169 INFO L472 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] [2021-06-12 20:45:50,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:50,369 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:50,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:50,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1020757778, now seen corresponding path program 81 times [2021-06-12 20:45:50,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:50,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887433554] [2021-06-12 20:45:50,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:50,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:50,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:50,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887433554] [2021-06-12 20:45:50,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887433554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:50,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390914691] [2021-06-12 20:45:50,547 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 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 [2021-06-12 20:45:50,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:45:50,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:50,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:50,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:50,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:50,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:50,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:50,835 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 33 treesize of output 17 [2021-06-12 20:45:50,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:50,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:50,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:50,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-12 20:45:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:50,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390914691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:50,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:50,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:45:50,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106741593] [2021-06-12 20:45:50,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:50,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:50,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:50,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:50,899 INFO L87 Difference]: Start difference. First operand 10099 states and 45355 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:45:52,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:52,255 INFO L93 Difference]: Finished difference Result 11202 states and 49643 transitions. [2021-06-12 20:45:52,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:45:52,256 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-06-12 20:45:52,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:52,281 INFO L225 Difference]: With dead ends: 11202 [2021-06-12 20:45:52,281 INFO L226 Difference]: Without dead ends: 11069 [2021-06-12 20:45:52,281 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 927.7ms TimeCoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:45:52,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11069 states. [2021-06-12 20:45:52,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11069 to 10109. [2021-06-12 20:45:52,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10109 states, 10108 states have (on average 4.49000791452315) internal successors, (45385), 10108 states have internal predecessors, (45385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:52,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10109 states to 10109 states and 45385 transitions. [2021-06-12 20:45:52,487 INFO L78 Accepts]: Start accepts. Automaton has 10109 states and 45385 transitions. Word has length 30 [2021-06-12 20:45:52,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:52,488 INFO L482 AbstractCegarLoop]: Abstraction has 10109 states and 45385 transitions. [2021-06-12 20:45:52,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:45:52,488 INFO L276 IsEmpty]: Start isEmpty. Operand 10109 states and 45385 transitions. [2021-06-12 20:45:52,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:52,505 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:52,505 INFO L472 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] [2021-06-12 20:45:52,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:52,706 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:52,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:52,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1527104044, now seen corresponding path program 82 times [2021-06-12 20:45:52,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:52,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956363952] [2021-06-12 20:45:52,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:52,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:52,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956363952] [2021-06-12 20:45:52,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956363952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:52,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593132518] [2021-06-12 20:45:52,910 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 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 [2021-06-12 20:45:52,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:45:52,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:52,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:52,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:53,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:53,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:53,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:53,124 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 33 treesize of output 17 [2021-06-12 20:45:53,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:53,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:53,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:53,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-12 20:45:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:53,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593132518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:53,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:53,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:45:53,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250694496] [2021-06-12 20:45:53,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:53,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:53,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:53,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:53,194 INFO L87 Difference]: Start difference. First operand 10109 states and 45385 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:45:54,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:54,350 INFO L93 Difference]: Finished difference Result 10710 states and 47678 transitions. [2021-06-12 20:45:54,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:45:54,350 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-06-12 20:45:54,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:54,374 INFO L225 Difference]: With dead ends: 10710 [2021-06-12 20:45:54,374 INFO L226 Difference]: Without dead ends: 10555 [2021-06-12 20:45:54,374 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 708.9ms TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:45:54,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10555 states. [2021-06-12 20:45:54,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10555 to 10101. [2021-06-12 20:45:54,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10101 states, 10100 states have (on average 4.490891089108911) internal successors, (45358), 10100 states have internal predecessors, (45358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:54,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10101 states to 10101 states and 45358 transitions. [2021-06-12 20:45:54,577 INFO L78 Accepts]: Start accepts. Automaton has 10101 states and 45358 transitions. Word has length 30 [2021-06-12 20:45:54,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:54,577 INFO L482 AbstractCegarLoop]: Abstraction has 10101 states and 45358 transitions. [2021-06-12 20:45:54,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:45:54,577 INFO L276 IsEmpty]: Start isEmpty. Operand 10101 states and 45358 transitions. [2021-06-12 20:45:54,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:54,595 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:54,595 INFO L472 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] [2021-06-12 20:45:54,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable715 [2021-06-12 20:45:54,795 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:54,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:54,796 INFO L82 PathProgramCache]: Analyzing trace with hash 423059838, now seen corresponding path program 83 times [2021-06-12 20:45:54,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:54,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492267461] [2021-06-12 20:45:54,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:55,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:55,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492267461] [2021-06-12 20:45:55,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492267461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:55,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922584256] [2021-06-12 20:45:55,023 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 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 [2021-06-12 20:45:55,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:45:55,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:55,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:55,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:55,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:55,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:55,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:55,222 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 23 treesize of output 13 [2021-06-12 20:45:55,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:55,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:55,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:55,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:10 [2021-06-12 20:45:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:55,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922584256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:55,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:55,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:45:55,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804197170] [2021-06-12 20:45:55,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:45:55,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:55,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:45:55,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:45:55,309 INFO L87 Difference]: Start difference. First operand 10101 states and 45358 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2021-06-12 20:45:56,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:56,898 INFO L93 Difference]: Finished difference Result 10279 states and 45963 transitions. [2021-06-12 20:45:56,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:45:56,898 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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 30 [2021-06-12 20:45:56,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:56,921 INFO L225 Difference]: With dead ends: 10279 [2021-06-12 20:45:56,921 INFO L226 Difference]: Without dead ends: 10224 [2021-06-12 20:45:56,921 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1240.0ms TimeCoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:45:56,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10224 states. [2021-06-12 20:45:57,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10224 to 10103. [2021-06-12 20:45:57,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10103 states, 10102 states have (on average 4.490496931300733) internal successors, (45363), 10102 states have internal predecessors, (45363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:57,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10103 states to 10103 states and 45363 transitions. [2021-06-12 20:45:57,118 INFO L78 Accepts]: Start accepts. Automaton has 10103 states and 45363 transitions. Word has length 30 [2021-06-12 20:45:57,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:57,118 INFO L482 AbstractCegarLoop]: Abstraction has 10103 states and 45363 transitions. [2021-06-12 20:45:57,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2021-06-12 20:45:57,118 INFO L276 IsEmpty]: Start isEmpty. Operand 10103 states and 45363 transitions. [2021-06-12 20:45:57,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:45:57,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:57,135 INFO L472 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] [2021-06-12 20:45:57,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:57,336 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:45:57,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:57,336 INFO L82 PathProgramCache]: Analyzing trace with hash -972527238, now seen corresponding path program 84 times [2021-06-12 20:45:57,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:57,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540702958] [2021-06-12 20:45:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:57,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:57,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540702958] [2021-06-12 20:45:57,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540702958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:57,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239927774] [2021-06-12 20:45:57,563 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 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 [2021-06-12 20:45:57,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:45:57,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:57,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:45:57,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:57,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:57,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:57,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:57,726 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 25 treesize of output 53 [2021-06-12 20:45:57,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:57,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:57,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:57,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-06-12 20:45:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:57,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239927774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:57,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:57,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:45:57,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171082160] [2021-06-12 20:45:57,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:45:57,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:57,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:45:57,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:45:57,925 INFO L87 Difference]: Start difference. First operand 10103 states and 45363 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-06-12 20:45:58,605 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-12 20:45:58,924 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-06-12 20:45:59,394 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-06-12 20:46:01,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:01,279 INFO L93 Difference]: Finished difference Result 11239 states and 49711 transitions. [2021-06-12 20:46:01,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 20:46:01,279 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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 30 [2021-06-12 20:46:01,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:01,304 INFO L225 Difference]: With dead ends: 11239 [2021-06-12 20:46:01,304 INFO L226 Difference]: Without dead ends: 11042 [2021-06-12 20:46:01,304 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 2565.6ms TimeCoverageRelationStatistics Valid=706, Invalid=4406, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 20:46:01,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11042 states. [2021-06-12 20:46:01,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11042 to 10128. [2021-06-12 20:46:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10128 states, 10127 states have (on average 4.488594845462624) internal successors, (45456), 10127 states have internal predecessors, (45456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:01,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10128 states to 10128 states and 45456 transitions. [2021-06-12 20:46:01,518 INFO L78 Accepts]: Start accepts. Automaton has 10128 states and 45456 transitions. Word has length 30 [2021-06-12 20:46:01,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:01,518 INFO L482 AbstractCegarLoop]: Abstraction has 10128 states and 45456 transitions. [2021-06-12 20:46:01,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-06-12 20:46:01,518 INFO L276 IsEmpty]: Start isEmpty. Operand 10128 states and 45456 transitions. [2021-06-12 20:46:01,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:01,536 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:01,536 INFO L472 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] [2021-06-12 20:46:01,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:01,736 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:01,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:01,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1336230824, now seen corresponding path program 85 times [2021-06-12 20:46:01,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:01,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031573499] [2021-06-12 20:46:01,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:01,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:01,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031573499] [2021-06-12 20:46:01,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031573499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:01,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726246269] [2021-06-12 20:46:01,995 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 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 [2021-06-12 20:46:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:02,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:02,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:02,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:02,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:02,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:02,245 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 30 treesize of output 16 [2021-06-12 20:46:02,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:02,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:02,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:02,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:46:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:02,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726246269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:02,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:02,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-12 20:46:02,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924315666] [2021-06-12 20:46:02,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:46:02,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:02,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:46:02,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:46:02,325 INFO L87 Difference]: Start difference. First operand 10128 states and 45456 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:46:03,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:03,692 INFO L93 Difference]: Finished difference Result 10579 states and 47189 transitions. [2021-06-12 20:46:03,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:46:03,693 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 30 [2021-06-12 20:46:03,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:03,716 INFO L225 Difference]: With dead ends: 10579 [2021-06-12 20:46:03,716 INFO L226 Difference]: Without dead ends: 10465 [2021-06-12 20:46:03,717 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1110.9ms TimeCoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:46:03,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10465 states. [2021-06-12 20:46:03,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10465 to 10132. [2021-06-12 20:46:03,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10132 states, 10131 states have (on average 4.488500641595104) internal successors, (45473), 10131 states have internal predecessors, (45473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:03,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10132 states to 10132 states and 45473 transitions. [2021-06-12 20:46:03,916 INFO L78 Accepts]: Start accepts. Automaton has 10132 states and 45473 transitions. Word has length 30 [2021-06-12 20:46:03,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:03,916 INFO L482 AbstractCegarLoop]: Abstraction has 10132 states and 45473 transitions. [2021-06-12 20:46:03,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:46:03,917 INFO L276 IsEmpty]: Start isEmpty. Operand 10132 states and 45473 transitions. [2021-06-12 20:46:03,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:03,934 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:03,934 INFO L472 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] [2021-06-12 20:46:04,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable722 [2021-06-12 20:46:04,137 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:04,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:04,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1868987806, now seen corresponding path program 86 times [2021-06-12 20:46:04,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:04,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216972580] [2021-06-12 20:46:04,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:04,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:04,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216972580] [2021-06-12 20:46:04,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216972580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:04,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538600564] [2021-06-12 20:46:04,388 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 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 [2021-06-12 20:46:04,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:46:04,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:04,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:46:04,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:04,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:04,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:04,580 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 26 treesize of output 32 [2021-06-12 20:46:04,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:04,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:04,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:04,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-06-12 20:46:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:04,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538600564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:04,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:04,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:46:04,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2916516] [2021-06-12 20:46:04,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:46:04,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:04,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:46:04,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:46:04,918 INFO L87 Difference]: Start difference. First operand 10132 states and 45473 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-06-12 20:46:06,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:06,412 INFO L93 Difference]: Finished difference Result 10562 states and 47028 transitions. [2021-06-12 20:46:06,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:46:06,412 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 30 [2021-06-12 20:46:06,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:06,437 INFO L225 Difference]: With dead ends: 10562 [2021-06-12 20:46:06,437 INFO L226 Difference]: Without dead ends: 10414 [2021-06-12 20:46:06,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1141.6ms TimeCoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:46:06,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10414 states. [2021-06-12 20:46:06,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10414 to 10131. [2021-06-12 20:46:06,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10131 states, 10130 states have (on average 4.487857847976308) internal successors, (45462), 10130 states have internal predecessors, (45462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:06,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10131 states to 10131 states and 45462 transitions. [2021-06-12 20:46:06,644 INFO L78 Accepts]: Start accepts. Automaton has 10131 states and 45462 transitions. Word has length 30 [2021-06-12 20:46:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:06,644 INFO L482 AbstractCegarLoop]: Abstraction has 10131 states and 45462 transitions. [2021-06-12 20:46:06,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-06-12 20:46:06,644 INFO L276 IsEmpty]: Start isEmpty. Operand 10131 states and 45462 transitions. [2021-06-12 20:46:06,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:06,662 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:06,662 INFO L472 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] [2021-06-12 20:46:06,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-06-12 20:46:06,862 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:06,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:06,862 INFO L82 PathProgramCache]: Analyzing trace with hash 580244706, now seen corresponding path program 87 times [2021-06-12 20:46:06,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:06,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153544748] [2021-06-12 20:46:06,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:07,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:07,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153544748] [2021-06-12 20:46:07,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153544748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:07,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316795289] [2021-06-12 20:46:07,089 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 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 [2021-06-12 20:46:07,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:46:07,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:07,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:46:07,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:07,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:07,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:07,273 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 26 treesize of output 32 [2021-06-12 20:46:07,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:07,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:07,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:07,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-06-12 20:46:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:07,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316795289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:07,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:07,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:46:07,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980397672] [2021-06-12 20:46:07,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:46:07,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:07,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:46:07,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:46:07,623 INFO L87 Difference]: Start difference. First operand 10131 states and 45462 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-06-12 20:46:09,345 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-06-12 20:46:10,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:10,936 INFO L93 Difference]: Finished difference Result 10829 states and 47863 transitions. [2021-06-12 20:46:10,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 20:46:10,937 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 30 [2021-06-12 20:46:10,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:11,010 INFO L225 Difference]: With dead ends: 10829 [2021-06-12 20:46:11,010 INFO L226 Difference]: Without dead ends: 10605 [2021-06-12 20:46:11,011 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 2522.0ms TimeCoverageRelationStatistics Valid=554, Invalid=3736, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 20:46:11,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10605 states. [2021-06-12 20:46:11,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10605 to 10133. [2021-06-12 20:46:11,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10133 states, 10132 states have (on average 4.48756415317805) internal successors, (45468), 10132 states have internal predecessors, (45468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:11,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10133 states to 10133 states and 45468 transitions. [2021-06-12 20:46:11,205 INFO L78 Accepts]: Start accepts. Automaton has 10133 states and 45468 transitions. Word has length 30 [2021-06-12 20:46:11,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:11,205 INFO L482 AbstractCegarLoop]: Abstraction has 10133 states and 45468 transitions. [2021-06-12 20:46:11,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-06-12 20:46:11,206 INFO L276 IsEmpty]: Start isEmpty. Operand 10133 states and 45468 transitions. [2021-06-12 20:46:11,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:11,223 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:11,223 INFO L472 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] [2021-06-12 20:46:11,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:11,423 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:11,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:11,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1970358584, now seen corresponding path program 88 times [2021-06-12 20:46:11,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:11,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783325733] [2021-06-12 20:46:11,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:11,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:11,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783325733] [2021-06-12 20:46:11,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783325733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:11,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064006066] [2021-06-12 20:46:11,688 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 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 [2021-06-12 20:46:11,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:46:11,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:11,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:11,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:11,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:11,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:11,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:11,864 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 30 treesize of output 16 [2021-06-12 20:46:11,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:11,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:11,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:11,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:46:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:11,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064006066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:11,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:11,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:46:11,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020530949] [2021-06-12 20:46:11,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:46:11,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:11,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:46:11,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:46:11,963 INFO L87 Difference]: Start difference. First operand 10133 states and 45468 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:13,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:13,469 INFO L93 Difference]: Finished difference Result 10579 states and 47136 transitions. [2021-06-12 20:46:13,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:46:13,470 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 20:46:13,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:13,495 INFO L225 Difference]: With dead ends: 10579 [2021-06-12 20:46:13,495 INFO L226 Difference]: Without dead ends: 10447 [2021-06-12 20:46:13,496 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1197.2ms TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:46:13,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10447 states. [2021-06-12 20:46:13,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10447 to 10144. [2021-06-12 20:46:13,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 10143 states have (on average 4.486345262742779) internal successors, (45505), 10143 states have internal predecessors, (45505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:13,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 45505 transitions. [2021-06-12 20:46:13,747 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 45505 transitions. Word has length 30 [2021-06-12 20:46:13,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:13,747 INFO L482 AbstractCegarLoop]: Abstraction has 10144 states and 45505 transitions. [2021-06-12 20:46:13,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:13,747 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 45505 transitions. [2021-06-12 20:46:13,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:13,764 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:13,764 INFO L472 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] [2021-06-12 20:46:13,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:13,964 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:13,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:13,965 INFO L82 PathProgramCache]: Analyzing trace with hash 555435182, now seen corresponding path program 89 times [2021-06-12 20:46:13,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:13,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011494300] [2021-06-12 20:46:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:14,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:14,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011494300] [2021-06-12 20:46:14,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011494300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:14,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787647677] [2021-06-12 20:46:14,174 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 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 [2021-06-12 20:46:14,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:46:14,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:14,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:14,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:14,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:14,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:14,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:14,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-12 20:46:14,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:14,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:14,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:14,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:183 [2021-06-12 20:46:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:14,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787647677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:14,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:14,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:46:14,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846407761] [2021-06-12 20:46:14,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:46:14,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:14,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:46:14,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:46:14,526 INFO L87 Difference]: Start difference. First operand 10144 states and 45505 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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) [2021-06-12 20:46:16,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:16,388 INFO L93 Difference]: Finished difference Result 11112 states and 49318 transitions. [2021-06-12 20:46:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:46:16,388 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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 30 [2021-06-12 20:46:16,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:16,413 INFO L225 Difference]: With dead ends: 11112 [2021-06-12 20:46:16,414 INFO L226 Difference]: Without dead ends: 11007 [2021-06-12 20:46:16,414 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1420.5ms TimeCoverageRelationStatistics Valid=315, Invalid=1847, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:46:16,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11007 states. [2021-06-12 20:46:16,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11007 to 10144. [2021-06-12 20:46:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 10143 states have (on average 4.486345262742779) internal successors, (45505), 10143 states have internal predecessors, (45505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:16,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 45505 transitions. [2021-06-12 20:46:16,686 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 45505 transitions. Word has length 30 [2021-06-12 20:46:16,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:16,687 INFO L482 AbstractCegarLoop]: Abstraction has 10144 states and 45505 transitions. [2021-06-12 20:46:16,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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) [2021-06-12 20:46:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 45505 transitions. [2021-06-12 20:46:16,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:16,705 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:16,705 INFO L472 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] [2021-06-12 20:46:16,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-06-12 20:46:16,905 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:16,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:16,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1224813476, now seen corresponding path program 90 times [2021-06-12 20:46:16,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:16,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656106302] [2021-06-12 20:46:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:17,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:17,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656106302] [2021-06-12 20:46:17,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656106302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:17,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763412899] [2021-06-12 20:46:17,111 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 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 [2021-06-12 20:46:17,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:46:17,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:17,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:17,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:17,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:17,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:17,265 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 23 treesize of output 49 [2021-06-12 20:46:17,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:17,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:17,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:17,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:49 [2021-06-12 20:46:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:17,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763412899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:17,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:17,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:46:17,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75933732] [2021-06-12 20:46:17,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:46:17,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:17,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:46:17,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:46:17,489 INFO L87 Difference]: Start difference. First operand 10144 states and 45505 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:46:20,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:20,018 INFO L93 Difference]: Finished difference Result 11292 states and 50081 transitions. [2021-06-12 20:46:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 20:46:20,018 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-06-12 20:46:20,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:20,043 INFO L225 Difference]: With dead ends: 11292 [2021-06-12 20:46:20,043 INFO L226 Difference]: Without dead ends: 11172 [2021-06-12 20:46:20,044 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1809.3ms TimeCoverageRelationStatistics Valid=448, Invalid=2744, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:46:20,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11172 states. [2021-06-12 20:46:20,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11172 to 10143. [2021-06-12 20:46:20,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10143 states, 10142 states have (on average 4.48590021691974) internal successors, (45496), 10142 states have internal predecessors, (45496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10143 states to 10143 states and 45496 transitions. [2021-06-12 20:46:20,250 INFO L78 Accepts]: Start accepts. Automaton has 10143 states and 45496 transitions. Word has length 30 [2021-06-12 20:46:20,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:20,250 INFO L482 AbstractCegarLoop]: Abstraction has 10143 states and 45496 transitions. [2021-06-12 20:46:20,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-06-12 20:46:20,250 INFO L276 IsEmpty]: Start isEmpty. Operand 10143 states and 45496 transitions. [2021-06-12 20:46:20,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:20,267 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:20,267 INFO L472 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] [2021-06-12 20:46:20,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable744,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:20,468 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:20,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:20,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1485718586, now seen corresponding path program 91 times [2021-06-12 20:46:20,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:20,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190675877] [2021-06-12 20:46:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:20,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:20,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190675877] [2021-06-12 20:46:20,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190675877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:20,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735441175] [2021-06-12 20:46:20,671 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 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 [2021-06-12 20:46:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:20,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:20,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:20,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:20,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:20,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:20,823 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 30 treesize of output 16 [2021-06-12 20:46:20,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:20,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:20,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:20,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:46:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:20,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735441175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:20,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:20,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:46:20,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923364014] [2021-06-12 20:46:20,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:46:20,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:20,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:46:20,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:46:20,907 INFO L87 Difference]: Start difference. First operand 10143 states and 45496 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:46:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:22,521 INFO L93 Difference]: Finished difference Result 10920 states and 48485 transitions. [2021-06-12 20:46:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:46:22,522 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 30 [2021-06-12 20:46:22,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:22,545 INFO L225 Difference]: With dead ends: 10920 [2021-06-12 20:46:22,546 INFO L226 Difference]: Without dead ends: 10749 [2021-06-12 20:46:22,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1330.3ms TimeCoverageRelationStatistics Valid=365, Invalid=1797, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:46:22,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10749 states. [2021-06-12 20:46:22,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10749 to 10129. [2021-06-12 20:46:22,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10129 states, 10128 states have (on average 4.488151658767772) internal successors, (45456), 10128 states have internal predecessors, (45456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:22,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10129 states to 10129 states and 45456 transitions. [2021-06-12 20:46:22,743 INFO L78 Accepts]: Start accepts. Automaton has 10129 states and 45456 transitions. Word has length 30 [2021-06-12 20:46:22,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:22,743 INFO L482 AbstractCegarLoop]: Abstraction has 10129 states and 45456 transitions. [2021-06-12 20:46:22,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:46:22,743 INFO L276 IsEmpty]: Start isEmpty. Operand 10129 states and 45456 transitions. [2021-06-12 20:46:22,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:22,761 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:22,761 INFO L472 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] [2021-06-12 20:46:22,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable749 [2021-06-12 20:46:22,961 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:22,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:22,961 INFO L82 PathProgramCache]: Analyzing trace with hash 97329558, now seen corresponding path program 8 times [2021-06-12 20:46:22,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:22,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063712251] [2021-06-12 20:46:22,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:23,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:23,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063712251] [2021-06-12 20:46:23,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063712251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:23,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041753641] [2021-06-12 20:46:23,131 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 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 [2021-06-12 20:46:23,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:46:23,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:23,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:23,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:23,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:23,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:23,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:23,379 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 30 treesize of output 16 [2021-06-12 20:46:23,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:23,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:23,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:23,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:46:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:23,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041753641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:23,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:23,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-12 20:46:23,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123690238] [2021-06-12 20:46:23,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:46:23,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:23,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:46:23,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:46:23,418 INFO L87 Difference]: Start difference. First operand 10129 states and 45456 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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) [2021-06-12 20:46:24,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:24,154 INFO L93 Difference]: Finished difference Result 10633 states and 47318 transitions. [2021-06-12 20:46:24,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:46:24,155 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 30 [2021-06-12 20:46:24,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:24,178 INFO L225 Difference]: With dead ends: 10633 [2021-06-12 20:46:24,178 INFO L226 Difference]: Without dead ends: 10432 [2021-06-12 20:46:24,178 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 400.5ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:46:24,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10432 states. [2021-06-12 20:46:24,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10432 to 10132. [2021-06-12 20:46:24,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10132 states, 10131 states have (on average 4.488105813838713) internal successors, (45469), 10131 states have internal predecessors, (45469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:24,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10132 states to 10132 states and 45469 transitions. [2021-06-12 20:46:24,370 INFO L78 Accepts]: Start accepts. Automaton has 10132 states and 45469 transitions. Word has length 30 [2021-06-12 20:46:24,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:24,370 INFO L482 AbstractCegarLoop]: Abstraction has 10132 states and 45469 transitions. [2021-06-12 20:46:24,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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) [2021-06-12 20:46:24,371 INFO L276 IsEmpty]: Start isEmpty. Operand 10132 states and 45469 transitions. [2021-06-12 20:46:24,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:24,387 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:24,387 INFO L472 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, 1] [2021-06-12 20:46:24,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable750 [2021-06-12 20:46:24,588 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:24,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:24,588 INFO L82 PathProgramCache]: Analyzing trace with hash -949036506, now seen corresponding path program 76 times [2021-06-12 20:46:24,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:24,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610444465] [2021-06-12 20:46:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:24,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:24,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610444465] [2021-06-12 20:46:24,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610444465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:24,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50511932] [2021-06-12 20:46:24,760 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 [2021-06-12 20:46:24,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:46:24,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:24,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:24,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:25,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:25,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:25,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:25,047 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 30 treesize of output 16 [2021-06-12 20:46:25,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:25,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:25,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:25,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:46:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:25,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50511932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:25,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:25,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:46:25,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259059825] [2021-06-12 20:46:25,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:46:25,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:25,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:46:25,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:46:25,102 INFO L87 Difference]: Start difference. First operand 10132 states and 45469 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:26,069 INFO L93 Difference]: Finished difference Result 10521 states and 46957 transitions. [2021-06-12 20:46:26,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:46:26,069 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 20:46:26,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:26,093 INFO L225 Difference]: With dead ends: 10521 [2021-06-12 20:46:26,093 INFO L226 Difference]: Without dead ends: 10423 [2021-06-12 20:46:26,093 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 654.9ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:46:26,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10423 states. [2021-06-12 20:46:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10423 to 10150. [2021-06-12 20:46:26,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10150 states, 10149 states have (on average 4.4874371859296485) internal successors, (45543), 10149 states have internal predecessors, (45543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10150 states to 10150 states and 45543 transitions. [2021-06-12 20:46:26,294 INFO L78 Accepts]: Start accepts. Automaton has 10150 states and 45543 transitions. Word has length 30 [2021-06-12 20:46:26,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:26,294 INFO L482 AbstractCegarLoop]: Abstraction has 10150 states and 45543 transitions. [2021-06-12 20:46:26,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 10150 states and 45543 transitions. [2021-06-12 20:46:26,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:26,312 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:26,312 INFO L472 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, 1] [2021-06-12 20:46:26,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-12 20:46:26,512 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:26,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:26,513 INFO L82 PathProgramCache]: Analyzing trace with hash -328552440, now seen corresponding path program 77 times [2021-06-12 20:46:26,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:26,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416882771] [2021-06-12 20:46:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:26,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:26,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416882771] [2021-06-12 20:46:26,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416882771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:26,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466794327] [2021-06-12 20:46:26,683 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 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 [2021-06-12 20:46:26,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:46:26,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:26,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:26,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:26,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:26,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:26,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:26,893 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 30 treesize of output 16 [2021-06-12 20:46:26,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:26,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:26,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:26,902 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:46:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:26,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466794327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:26,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:26,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-12 20:46:26,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478398104] [2021-06-12 20:46:26,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:46:26,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:26,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:46:26,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:46:26,931 INFO L87 Difference]: Start difference. First operand 10150 states and 45543 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2021-06-12 20:46:27,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:27,785 INFO L93 Difference]: Finished difference Result 10482 states and 46784 transitions. [2021-06-12 20:46:27,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:46:27,785 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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 30 [2021-06-12 20:46:27,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:27,808 INFO L225 Difference]: With dead ends: 10482 [2021-06-12 20:46:27,808 INFO L226 Difference]: Without dead ends: 10390 [2021-06-12 20:46:27,808 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 547.2ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:46:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10390 states. [2021-06-12 20:46:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10390 to 10144. [2021-06-12 20:46:27,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 10143 states have (on average 4.487331164349798) internal successors, (45515), 10143 states have internal predecessors, (45515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:27,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 45515 transitions. [2021-06-12 20:46:28,000 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 45515 transitions. Word has length 30 [2021-06-12 20:46:28,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:28,000 INFO L482 AbstractCegarLoop]: Abstraction has 10144 states and 45515 transitions. [2021-06-12 20:46:28,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2021-06-12 20:46:28,000 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 45515 transitions. [2021-06-12 20:46:28,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:28,017 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:28,017 INFO L472 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, 1] [2021-06-12 20:46:28,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-06-12 20:46:28,217 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:28,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:28,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2032488358, now seen corresponding path program 78 times [2021-06-12 20:46:28,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:28,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821974971] [2021-06-12 20:46:28,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:28,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:28,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821974971] [2021-06-12 20:46:28,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821974971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:28,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822835749] [2021-06-12 20:46:28,409 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 [2021-06-12 20:46:28,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:46:28,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:28,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:46:28,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:28,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:28,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:28,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:28,731 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 29 treesize of output 17 [2021-06-12 20:46:28,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:28,744 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-12 20:46:28,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:28,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-12 20:46:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:28,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822835749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:28,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:28,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:46:28,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152618088] [2021-06-12 20:46:28,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:46:28,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:28,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:46:28,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:46:28,789 INFO L87 Difference]: Start difference. First operand 10144 states and 45515 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:46:29,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:29,993 INFO L93 Difference]: Finished difference Result 10747 states and 47808 transitions. [2021-06-12 20:46:29,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:46:29,993 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:46:29,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:30,078 INFO L225 Difference]: With dead ends: 10747 [2021-06-12 20:46:30,079 INFO L226 Difference]: Without dead ends: 10631 [2021-06-12 20:46:30,079 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 874.1ms TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:46:30,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10631 states. [2021-06-12 20:46:30,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10631 to 10138. [2021-06-12 20:46:30,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10138 states, 10137 states have (on average 4.487816908355529) internal successors, (45493), 10137 states have internal predecessors, (45493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:30,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10138 states to 10138 states and 45493 transitions. [2021-06-12 20:46:30,264 INFO L78 Accepts]: Start accepts. Automaton has 10138 states and 45493 transitions. Word has length 30 [2021-06-12 20:46:30,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:30,264 INFO L482 AbstractCegarLoop]: Abstraction has 10138 states and 45493 transitions. [2021-06-12 20:46:30,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:46:30,264 INFO L276 IsEmpty]: Start isEmpty. Operand 10138 states and 45493 transitions. [2021-06-12 20:46:30,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:30,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:30,281 INFO L472 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, 1] [2021-06-12 20:46:30,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable753 [2021-06-12 20:46:30,482 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:30,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:30,482 INFO L82 PathProgramCache]: Analyzing trace with hash -782480168, now seen corresponding path program 79 times [2021-06-12 20:46:30,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:30,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021336848] [2021-06-12 20:46:30,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:30,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:30,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021336848] [2021-06-12 20:46:30,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021336848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:30,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537407537] [2021-06-12 20:46:30,676 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 [2021-06-12 20:46:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:30,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:30,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:30,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:30,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:30,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:30,845 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 30 treesize of output 16 [2021-06-12 20:46:30,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:30,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:30,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:30,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:46:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:30,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537407537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:30,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:30,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:46:30,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608333215] [2021-06-12 20:46:30,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:46:30,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:30,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:46:30,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:46:30,917 INFO L87 Difference]: Start difference. First operand 10138 states and 45493 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:31,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:31,959 INFO L93 Difference]: Finished difference Result 10625 states and 47358 transitions. [2021-06-12 20:46:31,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:46:31,959 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 20:46:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:31,983 INFO L225 Difference]: With dead ends: 10625 [2021-06-12 20:46:31,983 INFO L226 Difference]: Without dead ends: 10527 [2021-06-12 20:46:31,983 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 741.1ms TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:46:31,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10527 states. [2021-06-12 20:46:32,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10527 to 10150. [2021-06-12 20:46:32,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10150 states, 10149 states have (on average 4.487634249679771) internal successors, (45545), 10149 states have internal predecessors, (45545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10150 states to 10150 states and 45545 transitions. [2021-06-12 20:46:32,179 INFO L78 Accepts]: Start accepts. Automaton has 10150 states and 45545 transitions. Word has length 30 [2021-06-12 20:46:32,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:32,179 INFO L482 AbstractCegarLoop]: Abstraction has 10150 states and 45545 transitions. [2021-06-12 20:46:32,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:32,179 INFO L276 IsEmpty]: Start isEmpty. Operand 10150 states and 45545 transitions. [2021-06-12 20:46:32,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:32,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:32,278 INFO L472 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, 1] [2021-06-12 20:46:32,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable754,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:32,479 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:32,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:32,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1027673780, now seen corresponding path program 80 times [2021-06-12 20:46:32,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:32,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764079845] [2021-06-12 20:46:32,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:32,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:32,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764079845] [2021-06-12 20:46:32,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764079845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:32,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147811221] [2021-06-12 20:46:32,648 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 [2021-06-12 20:46:32,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:46:32,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:32,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:32,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:32,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:32,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:32,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:32,816 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 30 treesize of output 16 [2021-06-12 20:46:32,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:32,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:32,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:32,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:46:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:32,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147811221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:32,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:32,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:46:32,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793266667] [2021-06-12 20:46:32,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:46:32,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:32,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:46:32,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:46:32,889 INFO L87 Difference]: Start difference. First operand 10150 states and 45545 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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) [2021-06-12 20:46:33,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:33,839 INFO L93 Difference]: Finished difference Result 10653 states and 47452 transitions. [2021-06-12 20:46:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:46:33,839 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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 30 [2021-06-12 20:46:33,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:33,862 INFO L225 Difference]: With dead ends: 10653 [2021-06-12 20:46:33,862 INFO L226 Difference]: Without dead ends: 10550 [2021-06-12 20:46:33,863 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 692.7ms TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:46:33,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10550 states. [2021-06-12 20:46:34,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10550 to 10153. [2021-06-12 20:46:34,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10153 states, 10152 states have (on average 4.486702127659575) internal successors, (45549), 10152 states have internal predecessors, (45549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10153 states to 10153 states and 45549 transitions. [2021-06-12 20:46:34,060 INFO L78 Accepts]: Start accepts. Automaton has 10153 states and 45549 transitions. Word has length 30 [2021-06-12 20:46:34,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:34,060 INFO L482 AbstractCegarLoop]: Abstraction has 10153 states and 45549 transitions. [2021-06-12 20:46:34,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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) [2021-06-12 20:46:34,060 INFO L276 IsEmpty]: Start isEmpty. Operand 10153 states and 45549 transitions. [2021-06-12 20:46:34,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:34,078 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:34,078 INFO L472 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, 1] [2021-06-12 20:46:34,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable755 [2021-06-12 20:46:34,279 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:34,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:34,279 INFO L82 PathProgramCache]: Analyzing trace with hash 961883838, now seen corresponding path program 81 times [2021-06-12 20:46:34,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:34,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901556054] [2021-06-12 20:46:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:34,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:34,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901556054] [2021-06-12 20:46:34,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901556054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:34,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250320764] [2021-06-12 20:46:34,448 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 [2021-06-12 20:46:34,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:46:34,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:34,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:34,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:34,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:34,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:34,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:34,626 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 20:46:34,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:34,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:34,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:34,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:46:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:34,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250320764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:34,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:34,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:46:34,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236950354] [2021-06-12 20:46:34,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:46:34,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:34,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:46:34,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:46:34,701 INFO L87 Difference]: Start difference. First operand 10153 states and 45549 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:35,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:35,552 INFO L93 Difference]: Finished difference Result 10496 states and 46852 transitions. [2021-06-12 20:46:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:46:35,552 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 20:46:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:35,575 INFO L225 Difference]: With dead ends: 10496 [2021-06-12 20:46:35,575 INFO L226 Difference]: Without dead ends: 10398 [2021-06-12 20:46:35,575 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 605.9ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:46:35,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10398 states. [2021-06-12 20:46:35,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10398 to 10159. [2021-06-12 20:46:35,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10159 states, 10158 states have (on average 4.486611537704272) internal successors, (45575), 10158 states have internal predecessors, (45575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10159 states to 10159 states and 45575 transitions. [2021-06-12 20:46:35,769 INFO L78 Accepts]: Start accepts. Automaton has 10159 states and 45575 transitions. Word has length 30 [2021-06-12 20:46:35,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:35,769 INFO L482 AbstractCegarLoop]: Abstraction has 10159 states and 45575 transitions. [2021-06-12 20:46:35,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:35,769 INFO L276 IsEmpty]: Start isEmpty. Operand 10159 states and 45575 transitions. [2021-06-12 20:46:35,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:35,786 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:35,786 INFO L472 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, 1] [2021-06-12 20:46:35,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable756 [2021-06-12 20:46:35,987 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:35,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:35,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1582367904, now seen corresponding path program 82 times [2021-06-12 20:46:35,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:35,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056396759] [2021-06-12 20:46:35,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:36,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:36,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056396759] [2021-06-12 20:46:36,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056396759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:36,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821848762] [2021-06-12 20:46:36,155 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 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 [2021-06-12 20:46:36,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:46:36,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:36,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:36,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:36,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:36,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:36,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:36,356 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 30 treesize of output 16 [2021-06-12 20:46:36,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:36,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:36,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:36,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:46:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:36,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821848762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:36,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:36,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-12 20:46:36,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030075325] [2021-06-12 20:46:36,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:46:36,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:36,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:46:36,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:46:36,413 INFO L87 Difference]: Start difference. First operand 10159 states and 45575 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2021-06-12 20:46:37,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:37,147 INFO L93 Difference]: Finished difference Result 10493 states and 46821 transitions. [2021-06-12 20:46:37,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:46:37,148 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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 30 [2021-06-12 20:46:37,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:37,171 INFO L225 Difference]: With dead ends: 10493 [2021-06-12 20:46:37,172 INFO L226 Difference]: Without dead ends: 10401 [2021-06-12 20:46:37,172 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 481.5ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:46:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10401 states. [2021-06-12 20:46:37,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10401 to 10153. [2021-06-12 20:46:37,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10153 states, 10152 states have (on average 4.48650512214342) internal successors, (45547), 10152 states have internal predecessors, (45547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10153 states to 10153 states and 45547 transitions. [2021-06-12 20:46:37,421 INFO L78 Accepts]: Start accepts. Automaton has 10153 states and 45547 transitions. Word has length 30 [2021-06-12 20:46:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:37,421 INFO L482 AbstractCegarLoop]: Abstraction has 10153 states and 45547 transitions. [2021-06-12 20:46:37,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2021-06-12 20:46:37,422 INFO L276 IsEmpty]: Start isEmpty. Operand 10153 states and 45547 transitions. [2021-06-12 20:46:37,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:37,439 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:37,439 INFO L472 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, 1] [2021-06-12 20:46:37,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:37,640 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:37,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:37,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1941336736, now seen corresponding path program 83 times [2021-06-12 20:46:37,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:37,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298790653] [2021-06-12 20:46:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:37,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:37,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298790653] [2021-06-12 20:46:37,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298790653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:37,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744993533] [2021-06-12 20:46:37,809 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 [2021-06-12 20:46:37,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:46:37,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:37,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:37,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:37,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:37,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:37,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:37,972 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 30 treesize of output 16 [2021-06-12 20:46:37,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:37,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:37,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:37,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-12 20:46:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:38,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744993533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:38,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:38,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:46:38,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057871710] [2021-06-12 20:46:38,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:46:38,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:38,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:46:38,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:46:38,058 INFO L87 Difference]: Start difference. First operand 10153 states and 45547 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:46:39,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:39,032 INFO L93 Difference]: Finished difference Result 10806 states and 48053 transitions. [2021-06-12 20:46:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:46:39,033 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 30 [2021-06-12 20:46:39,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:39,056 INFO L225 Difference]: With dead ends: 10806 [2021-06-12 20:46:39,057 INFO L226 Difference]: Without dead ends: 10697 [2021-06-12 20:46:39,057 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 776.1ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:46:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10697 states. [2021-06-12 20:46:39,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10697 to 10153. [2021-06-12 20:46:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10153 states, 10152 states have (on average 4.48650512214342) internal successors, (45547), 10152 states have internal predecessors, (45547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10153 states to 10153 states and 45547 transitions. [2021-06-12 20:46:39,262 INFO L78 Accepts]: Start accepts. Automaton has 10153 states and 45547 transitions. Word has length 30 [2021-06-12 20:46:39,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:39,262 INFO L482 AbstractCegarLoop]: Abstraction has 10153 states and 45547 transitions. [2021-06-12 20:46:39,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:46:39,262 INFO L276 IsEmpty]: Start isEmpty. Operand 10153 states and 45547 transitions. [2021-06-12 20:46:39,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:39,280 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:39,280 INFO L472 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, 1] [2021-06-12 20:46:39,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable758 [2021-06-12 20:46:39,480 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:39,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:39,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1717163706, now seen corresponding path program 84 times [2021-06-12 20:46:39,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:39,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900136159] [2021-06-12 20:46:39,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:39,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:39,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900136159] [2021-06-12 20:46:39,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900136159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:39,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151818919] [2021-06-12 20:46:39,730 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 [2021-06-12 20:46:39,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:46:39,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:39,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:46:39,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:39,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:39,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:39,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:39,911 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 30 treesize of output 34 [2021-06-12 20:46:39,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:39,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:39,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:39,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:95 [2021-06-12 20:46:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:40,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151818919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:40,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:40,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:46:40,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375091509] [2021-06-12 20:46:40,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:46:40,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:40,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:46:40,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:46:40,123 INFO L87 Difference]: Start difference. First operand 10153 states and 45547 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-06-12 20:46:41,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:41,503 INFO L93 Difference]: Finished difference Result 10571 states and 46985 transitions. [2021-06-12 20:46:41,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:46:41,503 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 30 [2021-06-12 20:46:41,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:41,526 INFO L225 Difference]: With dead ends: 10571 [2021-06-12 20:46:41,526 INFO L226 Difference]: Without dead ends: 10363 [2021-06-12 20:46:41,526 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1128.5ms TimeCoverageRelationStatistics Valid=218, Invalid=1188, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:46:41,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10363 states. [2021-06-12 20:46:41,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10363 to 10150. [2021-06-12 20:46:41,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10150 states, 10149 states have (on average 4.486550399054094) internal successors, (45534), 10149 states have internal predecessors, (45534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:41,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10150 states to 10150 states and 45534 transitions. [2021-06-12 20:46:41,722 INFO L78 Accepts]: Start accepts. Automaton has 10150 states and 45534 transitions. Word has length 30 [2021-06-12 20:46:41,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:41,723 INFO L482 AbstractCegarLoop]: Abstraction has 10150 states and 45534 transitions. [2021-06-12 20:46:41,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-06-12 20:46:41,723 INFO L276 IsEmpty]: Start isEmpty. Operand 10150 states and 45534 transitions. [2021-06-12 20:46:41,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:41,740 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:41,740 INFO L472 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] [2021-06-12 20:46:41,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable759 [2021-06-12 20:46:41,941 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:41,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:41,941 INFO L82 PathProgramCache]: Analyzing trace with hash 853148546, now seen corresponding path program 9 times [2021-06-12 20:46:41,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:41,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350788653] [2021-06-12 20:46:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:46:42,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:42,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350788653] [2021-06-12 20:46:42,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350788653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:42,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889690867] [2021-06-12 20:46:42,137 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 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 [2021-06-12 20:46:42,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:46:42,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:42,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:46:42,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:42,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:42,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:42,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:42,404 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 29 treesize of output 17 [2021-06-12 20:46:42,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:42,417 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-12 20:46:42,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:42,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-12 20:46:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:42,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889690867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:42,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:42,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-12 20:46:42,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83055560] [2021-06-12 20:46:42,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:46:42,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:42,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:46:42,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:46:42,445 INFO L87 Difference]: Start difference. First operand 10150 states and 45534 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2021-06-12 20:46:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:43,204 INFO L93 Difference]: Finished difference Result 10534 states and 46964 transitions. [2021-06-12 20:46:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:46:43,205 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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 30 [2021-06-12 20:46:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:43,228 INFO L225 Difference]: With dead ends: 10534 [2021-06-12 20:46:43,228 INFO L226 Difference]: Without dead ends: 10439 [2021-06-12 20:46:43,228 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 468.8ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:46:43,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10439 states. [2021-06-12 20:46:43,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10439 to 10168. [2021-06-12 20:46:43,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10168 states, 10167 states have (on average 4.485984066096194) internal successors, (45609), 10167 states have internal predecessors, (45609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10168 states to 10168 states and 45609 transitions. [2021-06-12 20:46:43,432 INFO L78 Accepts]: Start accepts. Automaton has 10168 states and 45609 transitions. Word has length 30 [2021-06-12 20:46:43,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:43,432 INFO L482 AbstractCegarLoop]: Abstraction has 10168 states and 45609 transitions. [2021-06-12 20:46:43,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2021-06-12 20:46:43,432 INFO L276 IsEmpty]: Start isEmpty. Operand 10168 states and 45609 transitions. [2021-06-12 20:46:43,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:43,449 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:43,449 INFO L472 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, 1] [2021-06-12 20:46:43,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable766,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:43,650 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:43,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:43,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1718803998, now seen corresponding path program 85 times [2021-06-12 20:46:43,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:43,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846871346] [2021-06-12 20:46:43,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:43,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:43,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846871346] [2021-06-12 20:46:43,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846871346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:43,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932729414] [2021-06-12 20:46:43,841 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 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 [2021-06-12 20:46:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:43,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:43,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:44,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:44,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:44,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:44,087 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 33 treesize of output 17 [2021-06-12 20:46:44,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:44,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:44,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:44,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-12 20:46:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:44,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932729414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:44,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:44,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 20:46:44,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267841578] [2021-06-12 20:46:44,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:46:44,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:44,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:46:44,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:46:44,137 INFO L87 Difference]: Start difference. First operand 10168 states and 45609 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:46:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:45,509 INFO L93 Difference]: Finished difference Result 10724 states and 47736 transitions. [2021-06-12 20:46:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:46:45,510 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-06-12 20:46:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:45,533 INFO L225 Difference]: With dead ends: 10724 [2021-06-12 20:46:45,533 INFO L226 Difference]: Without dead ends: 10609 [2021-06-12 20:46:45,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 922.2ms TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:46:45,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10609 states. [2021-06-12 20:46:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10609 to 10170. [2021-06-12 20:46:45,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10170 states, 10169 states have (on average 4.486085160782771) internal successors, (45619), 10169 states have internal predecessors, (45619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:45,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10170 states to 10170 states and 45619 transitions. [2021-06-12 20:46:45,743 INFO L78 Accepts]: Start accepts. Automaton has 10170 states and 45619 transitions. Word has length 30 [2021-06-12 20:46:45,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:45,743 INFO L482 AbstractCegarLoop]: Abstraction has 10170 states and 45619 transitions. [2021-06-12 20:46:45,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-12 20:46:45,743 INFO L276 IsEmpty]: Start isEmpty. Operand 10170 states and 45619 transitions. [2021-06-12 20:46:45,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:45,761 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:45,761 INFO L472 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, 1] [2021-06-12 20:46:45,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable767 [2021-06-12 20:46:45,962 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:45,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:45,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1721578654, now seen corresponding path program 86 times [2021-06-12 20:46:45,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:45,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667977840] [2021-06-12 20:46:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:46,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:46,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667977840] [2021-06-12 20:46:46,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667977840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:46,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457332916] [2021-06-12 20:46:46,142 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 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 [2021-06-12 20:46:46,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:46:46,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:46,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:46:46,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:46,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:46,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:46,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:46,408 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 29 treesize of output 17 [2021-06-12 20:46:46,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:46,424 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-06-12 20:46:46,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:46,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:14 [2021-06-12 20:46:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:46,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457332916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:46,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:46,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:46:46,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483084798] [2021-06-12 20:46:46,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:46:46,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:46,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:46:46,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:46:46,485 INFO L87 Difference]: Start difference. First operand 10170 states and 45619 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:46:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:48,041 INFO L93 Difference]: Finished difference Result 10835 states and 48126 transitions. [2021-06-12 20:46:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:46:48,042 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:46:48,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:48,066 INFO L225 Difference]: With dead ends: 10835 [2021-06-12 20:46:48,066 INFO L226 Difference]: Without dead ends: 10728 [2021-06-12 20:46:48,066 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1151.5ms TimeCoverageRelationStatistics Valid=348, Invalid=1632, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:46:48,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10728 states. [2021-06-12 20:46:48,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10728 to 10177. [2021-06-12 20:46:48,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10177 states, 10176 states have (on average 4.484669811320755) internal successors, (45636), 10176 states have internal predecessors, (45636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:48,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10177 states to 10177 states and 45636 transitions. [2021-06-12 20:46:48,269 INFO L78 Accepts]: Start accepts. Automaton has 10177 states and 45636 transitions. Word has length 30 [2021-06-12 20:46:48,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:48,269 INFO L482 AbstractCegarLoop]: Abstraction has 10177 states and 45636 transitions. [2021-06-12 20:46:48,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:46:48,269 INFO L276 IsEmpty]: Start isEmpty. Operand 10177 states and 45636 transitions. [2021-06-12 20:46:48,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:48,288 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:48,288 INFO L472 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, 1] [2021-06-12 20:46:48,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:48,489 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:48,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:48,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1215232388, now seen corresponding path program 87 times [2021-06-12 20:46:48,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:48,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471561822] [2021-06-12 20:46:48,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:48,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:48,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471561822] [2021-06-12 20:46:48,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471561822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:48,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067249021] [2021-06-12 20:46:48,673 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 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 [2021-06-12 20:46:48,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:46:48,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:48,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:46:48,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:48,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:48,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:48,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:48,945 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 29 treesize of output 17 [2021-06-12 20:46:48,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:48,961 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-06-12 20:46:48,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:48,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:14 [2021-06-12 20:46:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:49,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067249021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:49,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:49,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:46:49,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594575630] [2021-06-12 20:46:49,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:46:49,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:49,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:46:49,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:46:49,026 INFO L87 Difference]: Start difference. First operand 10177 states and 45636 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:46:50,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:50,237 INFO L93 Difference]: Finished difference Result 10651 states and 47409 transitions. [2021-06-12 20:46:50,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:46:50,238 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-06-12 20:46:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:50,261 INFO L225 Difference]: With dead ends: 10651 [2021-06-12 20:46:50,261 INFO L226 Difference]: Without dead ends: 10524 [2021-06-12 20:46:50,261 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 792.9ms TimeCoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:46:50,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10524 states. [2021-06-12 20:46:50,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10524 to 10168. [2021-06-12 20:46:50,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10168 states, 10167 states have (on average 4.4860824235270975) internal successors, (45610), 10167 states have internal predecessors, (45610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:50,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10168 states to 10168 states and 45610 transitions. [2021-06-12 20:46:50,466 INFO L78 Accepts]: Start accepts. Automaton has 10168 states and 45610 transitions. Word has length 30 [2021-06-12 20:46:50,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:50,466 INFO L482 AbstractCegarLoop]: Abstraction has 10168 states and 45610 transitions. [2021-06-12 20:46:50,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-06-12 20:46:50,466 INFO L276 IsEmpty]: Start isEmpty. Operand 10168 states and 45610 transitions. [2021-06-12 20:46:50,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:50,484 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:50,484 INFO L472 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] [2021-06-12 20:46:50,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable769 [2021-06-12 20:46:50,684 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:50,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:50,684 INFO L82 PathProgramCache]: Analyzing trace with hash -216230256, now seen corresponding path program 92 times [2021-06-12 20:46:50,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:50,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667437016] [2021-06-12 20:46:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:50,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:50,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667437016] [2021-06-12 20:46:50,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667437016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:50,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662187233] [2021-06-12 20:46:50,857 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 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 [2021-06-12 20:46:50,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:46:50,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:50,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:46:50,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:51,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:51,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:51,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:51,075 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 [2021-06-12 20:46:51,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:46:51,116 INFO L628 ElimStorePlain]: treesize reduction 6, result has 88.9 percent of original size [2021-06-12 20:46:51,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:51,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:61 [2021-06-12 20:46:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:51,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662187233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:51,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:51,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:46:51,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883304406] [2021-06-12 20:46:51,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:46:51,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:51,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:46:51,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:46:51,249 INFO L87 Difference]: Start difference. First operand 10168 states and 45610 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:53,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:53,905 INFO L93 Difference]: Finished difference Result 12846 states and 55901 transitions. [2021-06-12 20:46:53,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 20:46:53,905 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 20:46:53,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:53,935 INFO L225 Difference]: With dead ends: 12846 [2021-06-12 20:46:53,935 INFO L226 Difference]: Without dead ends: 12531 [2021-06-12 20:46:53,935 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1542.0ms TimeCoverageRelationStatistics Valid=349, Invalid=2407, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:46:53,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12531 states. [2021-06-12 20:46:54,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12531 to 10321. [2021-06-12 20:46:54,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10321 states, 10320 states have (on average 4.48827519379845) internal successors, (46319), 10320 states have internal predecessors, (46319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:54,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10321 states to 10321 states and 46319 transitions. [2021-06-12 20:46:54,165 INFO L78 Accepts]: Start accepts. Automaton has 10321 states and 46319 transitions. Word has length 30 [2021-06-12 20:46:54,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:54,165 INFO L482 AbstractCegarLoop]: Abstraction has 10321 states and 46319 transitions. [2021-06-12 20:46:54,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:54,166 INFO L276 IsEmpty]: Start isEmpty. Operand 10321 states and 46319 transitions. [2021-06-12 20:46:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:54,183 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:54,183 INFO L472 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, 1] [2021-06-12 20:46:54,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:54,384 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:54,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:54,384 INFO L82 PathProgramCache]: Analyzing trace with hash -926529414, now seen corresponding path program 88 times [2021-06-12 20:46:54,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:54,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322690355] [2021-06-12 20:46:54,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:54,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:54,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322690355] [2021-06-12 20:46:54,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322690355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:54,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732064341] [2021-06-12 20:46:54,562 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 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 [2021-06-12 20:46:54,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:46:54,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:54,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:54,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:54,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:54,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:54,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:54,783 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 29 treesize of output 15 [2021-06-12 20:46:54,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:54,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:54,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:54,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-12 20:46:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:54,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732064341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:54,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:54,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:46:54,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302664838] [2021-06-12 20:46:54,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:46:54,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:54,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:46:54,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:46:54,820 INFO L87 Difference]: Start difference. First operand 10321 states and 46319 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:46:56,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:56,139 INFO L93 Difference]: Finished difference Result 11226 states and 49788 transitions. [2021-06-12 20:46:56,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:46:56,140 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 30 [2021-06-12 20:46:56,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:56,164 INFO L225 Difference]: With dead ends: 11226 [2021-06-12 20:46:56,165 INFO L226 Difference]: Without dead ends: 11118 [2021-06-12 20:46:56,165 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 734.7ms TimeCoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:46:56,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11118 states. [2021-06-12 20:46:56,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11118 to 10313. [2021-06-12 20:46:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 4.488460046547711) internal successors, (46285), 10312 states have internal predecessors, (46285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:56,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 46285 transitions. [2021-06-12 20:46:56,384 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 46285 transitions. Word has length 30 [2021-06-12 20:46:56,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:56,384 INFO L482 AbstractCegarLoop]: Abstraction has 10313 states and 46285 transitions. [2021-06-12 20:46:56,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:46:56,384 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 46285 transitions. [2021-06-12 20:46:56,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:46:56,402 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:56,402 INFO L472 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] [2021-06-12 20:46:56,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable776 [2021-06-12 20:46:56,603 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:46:56,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:56,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1191371828, now seen corresponding path program 93 times [2021-06-12 20:46:56,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:56,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707495638] [2021-06-12 20:46:56,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:56,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:56,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707495638] [2021-06-12 20:46:56,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707495638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:56,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981195061] [2021-06-12 20:46:56,781 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 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 [2021-06-12 20:46:56,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:46:56,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:56,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:46:56,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:56,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:46:56,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:56,972 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 26 treesize of output 32 [2021-06-12 20:46:56,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:56,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:56,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:56,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-12 20:46:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:57,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981195061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:57,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:57,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:46:57,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188516437] [2021-06-12 20:46:57,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:46:57,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:57,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:46:57,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:46:57,152 INFO L87 Difference]: Start difference. First operand 10313 states and 46285 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:00,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:00,138 INFO L93 Difference]: Finished difference Result 12233 states and 53497 transitions. [2021-06-12 20:47:00,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 20:47:00,138 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 20:47:00,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:00,165 INFO L225 Difference]: With dead ends: 12233 [2021-06-12 20:47:00,165 INFO L226 Difference]: Without dead ends: 12017 [2021-06-12 20:47:00,165 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 1902.5ms TimeCoverageRelationStatistics Valid=495, Invalid=3665, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 20:47:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12017 states. [2021-06-12 20:47:00,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12017 to 10323. [2021-06-12 20:47:00,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10323 states, 10322 states have (on average 4.488858748304592) internal successors, (46334), 10322 states have internal predecessors, (46334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10323 states to 10323 states and 46334 transitions. [2021-06-12 20:47:00,484 INFO L78 Accepts]: Start accepts. Automaton has 10323 states and 46334 transitions. Word has length 30 [2021-06-12 20:47:00,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:00,484 INFO L482 AbstractCegarLoop]: Abstraction has 10323 states and 46334 transitions. [2021-06-12 20:47:00,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:00,484 INFO L276 IsEmpty]: Start isEmpty. Operand 10323 states and 46334 transitions. [2021-06-12 20:47:00,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:47:00,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:00,502 INFO L472 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] [2021-06-12 20:47:00,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable777,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:00,703 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:00,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:00,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1504898224, now seen corresponding path program 94 times [2021-06-12 20:47:00,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:00,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623350733] [2021-06-12 20:47:00,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:00,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:00,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623350733] [2021-06-12 20:47:00,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623350733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:00,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861470801] [2021-06-12 20:47:00,890 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 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 [2021-06-12 20:47:00,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:47:00,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:00,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:00,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:01,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:01,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:01,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:01,073 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 30 treesize of output 16 [2021-06-12 20:47:01,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:01,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:01,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:01,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:47:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:01,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861470801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:01,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:01,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:47:01,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678607453] [2021-06-12 20:47:01,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:47:01,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:01,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:47:01,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:47:01,145 INFO L87 Difference]: Start difference. First operand 10323 states and 46334 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:47:03,534 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-06-12 20:47:03,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:03,994 INFO L93 Difference]: Finished difference Result 13273 states and 57942 transitions. [2021-06-12 20:47:03,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 20:47:03,995 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 30 [2021-06-12 20:47:03,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:04,023 INFO L225 Difference]: With dead ends: 13273 [2021-06-12 20:47:04,024 INFO L226 Difference]: Without dead ends: 13102 [2021-06-12 20:47:04,024 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 1930.3ms TimeCoverageRelationStatistics Valid=721, Invalid=3971, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 20:47:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13102 states. [2021-06-12 20:47:04,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13102 to 10327. [2021-06-12 20:47:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10327 states, 10326 states have (on average 4.488766221189231) internal successors, (46351), 10326 states have internal predecessors, (46351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10327 states to 10327 states and 46351 transitions. [2021-06-12 20:47:04,246 INFO L78 Accepts]: Start accepts. Automaton has 10327 states and 46351 transitions. Word has length 30 [2021-06-12 20:47:04,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:04,246 INFO L482 AbstractCegarLoop]: Abstraction has 10327 states and 46351 transitions. [2021-06-12 20:47:04,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:47:04,246 INFO L276 IsEmpty]: Start isEmpty. Operand 10327 states and 46351 transitions. [2021-06-12 20:47:04,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:47:04,264 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:04,264 INFO L472 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, 1] [2021-06-12 20:47:04,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable782 [2021-06-12 20:47:04,464 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:04,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:04,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1930569974, now seen corresponding path program 89 times [2021-06-12 20:47:04,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:04,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920439911] [2021-06-12 20:47:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:04,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:04,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920439911] [2021-06-12 20:47:04,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920439911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:04,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581742991] [2021-06-12 20:47:04,666 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 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 [2021-06-12 20:47:04,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:47:04,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:04,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:04,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:04,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:04,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:04,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:04,856 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-12 20:47:04,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:04,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:04,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:04,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:47:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:04,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581742991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:04,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:04,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:47:04,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459429627] [2021-06-12 20:47:04,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:47:04,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:04,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:47:04,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:47:04,915 INFO L87 Difference]: Start difference. First operand 10327 states and 46351 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:47:06,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:06,441 INFO L93 Difference]: Finished difference Result 10927 states and 48707 transitions. [2021-06-12 20:47:06,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:47:06,441 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 30 [2021-06-12 20:47:06,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:06,465 INFO L225 Difference]: With dead ends: 10927 [2021-06-12 20:47:06,465 INFO L226 Difference]: Without dead ends: 10838 [2021-06-12 20:47:06,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 969.1ms TimeCoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:47:06,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10838 states. [2021-06-12 20:47:06,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10838 to 10336. [2021-06-12 20:47:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10336 states, 10335 states have (on average 4.489598451862602) internal successors, (46400), 10335 states have internal predecessors, (46400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10336 states to 10336 states and 46400 transitions. [2021-06-12 20:47:06,672 INFO L78 Accepts]: Start accepts. Automaton has 10336 states and 46400 transitions. Word has length 30 [2021-06-12 20:47:06,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:06,672 INFO L482 AbstractCegarLoop]: Abstraction has 10336 states and 46400 transitions. [2021-06-12 20:47:06,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:47:06,672 INFO L276 IsEmpty]: Start isEmpty. Operand 10336 states and 46400 transitions. [2021-06-12 20:47:06,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:47:06,690 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:06,690 INFO L472 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, 1] [2021-06-12 20:47:06,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-12 20:47:06,890 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:06,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:06,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1758367826, now seen corresponding path program 90 times [2021-06-12 20:47:06,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:06,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402648012] [2021-06-12 20:47:06,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:07,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:07,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402648012] [2021-06-12 20:47:07,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402648012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:07,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214118536] [2021-06-12 20:47:07,041 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 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 [2021-06-12 20:47:07,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:47:07,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:07,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:47:07,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:07,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:07,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:07,224 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 26 treesize of output 32 [2021-06-12 20:47:07,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:07,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:07,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:07,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-12 20:47:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:07,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214118536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:07,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:07,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:47:07,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658148459] [2021-06-12 20:47:07,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:47:07,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:07,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:47:07,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:47:07,331 INFO L87 Difference]: Start difference. First operand 10336 states and 46400 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:47:08,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:08,966 INFO L93 Difference]: Finished difference Result 12684 states and 55270 transitions. [2021-06-12 20:47:08,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:47:08,966 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 30 [2021-06-12 20:47:08,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:08,997 INFO L225 Difference]: With dead ends: 12684 [2021-06-12 20:47:08,997 INFO L226 Difference]: Without dead ends: 12533 [2021-06-12 20:47:08,997 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1006.4ms TimeCoverageRelationStatistics Valid=354, Invalid=1902, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:47:09,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12533 states. [2021-06-12 20:47:09,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12533 to 10332. [2021-06-12 20:47:09,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10332 states, 10331 states have (on average 4.490078404801084) internal successors, (46387), 10331 states have internal predecessors, (46387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10332 states to 10332 states and 46387 transitions. [2021-06-12 20:47:09,258 INFO L78 Accepts]: Start accepts. Automaton has 10332 states and 46387 transitions. Word has length 30 [2021-06-12 20:47:09,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:09,258 INFO L482 AbstractCegarLoop]: Abstraction has 10332 states and 46387 transitions. [2021-06-12 20:47:09,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-06-12 20:47:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 10332 states and 46387 transitions. [2021-06-12 20:47:09,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:47:09,276 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:09,276 INFO L472 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] [2021-06-12 20:47:09,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-06-12 20:47:09,477 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:09,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:09,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1322558186, now seen corresponding path program 95 times [2021-06-12 20:47:09,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:09,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858636449] [2021-06-12 20:47:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:09,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:09,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858636449] [2021-06-12 20:47:09,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858636449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:09,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691742483] [2021-06-12 20:47:09,652 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 [2021-06-12 20:47:09,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:47:09,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:09,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:09,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:09,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:09,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:09,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:09,871 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 29 treesize of output 15 [2021-06-12 20:47:09,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:09,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:09,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:09,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-12 20:47:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:09,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691742483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:09,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:09,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:47:09,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982845017] [2021-06-12 20:47:09,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:47:09,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:09,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:47:09,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:47:09,908 INFO L87 Difference]: Start difference. First operand 10332 states and 46387 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:47:11,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:11,044 INFO L93 Difference]: Finished difference Result 11250 states and 49896 transitions. [2021-06-12 20:47:11,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:47:11,044 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 30 [2021-06-12 20:47:11,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:11,130 INFO L225 Difference]: With dead ends: 11250 [2021-06-12 20:47:11,131 INFO L226 Difference]: Without dead ends: 11142 [2021-06-12 20:47:11,131 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 647.3ms TimeCoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:47:11,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11142 states. [2021-06-12 20:47:11,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11142 to 10350. [2021-06-12 20:47:11,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10350 states, 10349 states have (on average 4.489805778336071) internal successors, (46465), 10349 states have internal predecessors, (46465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10350 states to 10350 states and 46465 transitions. [2021-06-12 20:47:11,334 INFO L78 Accepts]: Start accepts. Automaton has 10350 states and 46465 transitions. Word has length 30 [2021-06-12 20:47:11,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:11,334 INFO L482 AbstractCegarLoop]: Abstraction has 10350 states and 46465 transitions. [2021-06-12 20:47:11,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:47:11,334 INFO L276 IsEmpty]: Start isEmpty. Operand 10350 states and 46465 transitions. [2021-06-12 20:47:11,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:47:11,352 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:11,352 INFO L472 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, 1] [2021-06-12 20:47:11,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable788,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:11,553 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:11,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:11,553 INFO L82 PathProgramCache]: Analyzing trace with hash 612259028, now seen corresponding path program 91 times [2021-06-12 20:47:11,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:11,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165701660] [2021-06-12 20:47:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:11,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:11,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165701660] [2021-06-12 20:47:11,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165701660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:11,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148187349] [2021-06-12 20:47:11,751 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 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 [2021-06-12 20:47:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:11,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:11,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:11,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:11,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:11,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:11,956 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 29 treesize of output 15 [2021-06-12 20:47:11,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:11,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:11,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:11,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-12 20:47:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:11,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148187349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:11,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:11,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 20:47:11,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564720113] [2021-06-12 20:47:11,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:47:11,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:11,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:47:11,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:47:11,992 INFO L87 Difference]: Start difference. First operand 10350 states and 46465 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:47:13,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:13,399 INFO L93 Difference]: Finished difference Result 11386 states and 50407 transitions. [2021-06-12 20:47:13,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:47:13,400 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 30 [2021-06-12 20:47:13,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:13,425 INFO L225 Difference]: With dead ends: 11386 [2021-06-12 20:47:13,425 INFO L226 Difference]: Without dead ends: 11278 [2021-06-12 20:47:13,425 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 843.6ms TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:47:13,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11278 states. [2021-06-12 20:47:13,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11278 to 10342. [2021-06-12 20:47:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10342 states, 10341 states have (on average 4.489411082100377) internal successors, (46425), 10341 states have internal predecessors, (46425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:13,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10342 states to 10342 states and 46425 transitions. [2021-06-12 20:47:13,681 INFO L78 Accepts]: Start accepts. Automaton has 10342 states and 46425 transitions. Word has length 30 [2021-06-12 20:47:13,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:13,682 INFO L482 AbstractCegarLoop]: Abstraction has 10342 states and 46425 transitions. [2021-06-12 20:47:13,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-06-12 20:47:13,682 INFO L276 IsEmpty]: Start isEmpty. Operand 10342 states and 46425 transitions. [2021-06-12 20:47:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:47:13,699 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:13,699 INFO L472 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] [2021-06-12 20:47:13,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable789 [2021-06-12 20:47:13,900 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:13,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:13,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1832674602, now seen corresponding path program 96 times [2021-06-12 20:47:13,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:13,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750521579] [2021-06-12 20:47:13,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:14,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:14,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750521579] [2021-06-12 20:47:14,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750521579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:14,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351344138] [2021-06-12 20:47:14,094 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 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 [2021-06-12 20:47:14,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:47:14,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:14,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:14,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:14,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:14,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:14,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:14,286 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 30 treesize of output 16 [2021-06-12 20:47:14,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:14,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:14,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:14,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:47:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:14,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351344138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:14,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:14,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-12 20:47:14,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511094624] [2021-06-12 20:47:14,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:47:14,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:14,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:47:14,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:47:14,325 INFO L87 Difference]: Start difference. First operand 10342 states and 46425 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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) [2021-06-12 20:47:15,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:15,288 INFO L93 Difference]: Finished difference Result 11031 states and 49099 transitions. [2021-06-12 20:47:15,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:47:15,289 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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 30 [2021-06-12 20:47:15,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:15,313 INFO L225 Difference]: With dead ends: 11031 [2021-06-12 20:47:15,313 INFO L226 Difference]: Without dead ends: 10926 [2021-06-12 20:47:15,313 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 663.6ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:47:15,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10926 states. [2021-06-12 20:47:15,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10926 to 10348. [2021-06-12 20:47:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10348 states, 10347 states have (on average 4.489127283270514) internal successors, (46449), 10347 states have internal predecessors, (46449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10348 states to 10348 states and 46449 transitions. [2021-06-12 20:47:15,576 INFO L78 Accepts]: Start accepts. Automaton has 10348 states and 46449 transitions. Word has length 30 [2021-06-12 20:47:15,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:15,576 INFO L482 AbstractCegarLoop]: Abstraction has 10348 states and 46449 transitions. [2021-06-12 20:47:15,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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) [2021-06-12 20:47:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 10348 states and 46449 transitions. [2021-06-12 20:47:15,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:47:15,594 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:15,594 INFO L472 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] [2021-06-12 20:47:15,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable790,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:15,794 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:15,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:15,795 INFO L82 PathProgramCache]: Analyzing trace with hash 849814126, now seen corresponding path program 97 times [2021-06-12 20:47:15,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:15,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260795847] [2021-06-12 20:47:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:15,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:15,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260795847] [2021-06-12 20:47:15,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260795847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:15,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137581468] [2021-06-12 20:47:15,983 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 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 [2021-06-12 20:47:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:16,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:16,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:16,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:16,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:16,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:16,174 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 30 treesize of output 16 [2021-06-12 20:47:16,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:16,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:16,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:16,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 20:47:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:16,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137581468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:16,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:16,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-12 20:47:16,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153043830] [2021-06-12 20:47:16,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:47:16,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:16,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:47:16,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:47:16,213 INFO L87 Difference]: Start difference. First operand 10348 states and 46449 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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) [2021-06-12 20:47:17,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:17,246 INFO L93 Difference]: Finished difference Result 11031 states and 49085 transitions. [2021-06-12 20:47:17,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:47:17,246 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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 30 [2021-06-12 20:47:17,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:17,270 INFO L225 Difference]: With dead ends: 11031 [2021-06-12 20:47:17,271 INFO L226 Difference]: Without dead ends: 10934 [2021-06-12 20:47:17,271 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 656.8ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:47:17,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10934 states. [2021-06-12 20:47:17,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10934 to 10343. [2021-06-12 20:47:17,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10343 states, 10342 states have (on average 4.489073680139238) internal successors, (46426), 10342 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) [2021-06-12 20:47:17,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10343 states to 10343 states and 46426 transitions. [2021-06-12 20:47:17,484 INFO L78 Accepts]: Start accepts. Automaton has 10343 states and 46426 transitions. Word has length 30 [2021-06-12 20:47:17,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:17,484 INFO L482 AbstractCegarLoop]: Abstraction has 10343 states and 46426 transitions. [2021-06-12 20:47:17,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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) [2021-06-12 20:47:17,484 INFO L276 IsEmpty]: Start isEmpty. Operand 10343 states and 46426 transitions. [2021-06-12 20:47:17,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:47:17,584 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:17,584 INFO L472 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, 1] [2021-06-12 20:47:17,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable791,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:17,785 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:17,785 INFO L82 PathProgramCache]: Analyzing trace with hash -7297126, now seen corresponding path program 92 times [2021-06-12 20:47:17,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:17,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592612289] [2021-06-12 20:47:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:17,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:17,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592612289] [2021-06-12 20:47:17,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592612289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:17,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18837680] [2021-06-12 20:47:17,985 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 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 [2021-06-12 20:47:18,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:47:18,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:18,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:47:18,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:18,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:18,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:18,176 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 26 treesize of output 32 [2021-06-12 20:47:18,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:18,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:18,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:18,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-12 20:47:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:18,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18837680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:18,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:18,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:47:18,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145996322] [2021-06-12 20:47:18,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:47:18,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:18,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:47:18,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:47:18,323 INFO L87 Difference]: Start difference. First operand 10343 states and 46426 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:47:21,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:21,199 INFO L93 Difference]: Finished difference Result 13074 states and 56990 transitions. [2021-06-12 20:47:21,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 20:47:21,199 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 30 [2021-06-12 20:47:21,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:21,229 INFO L225 Difference]: With dead ends: 13074 [2021-06-12 20:47:21,229 INFO L226 Difference]: Without dead ends: 12890 [2021-06-12 20:47:21,229 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1948.3ms TimeCoverageRelationStatistics Valid=547, Invalid=3359, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 20:47:21,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12890 states. [2021-06-12 20:47:21,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12890 to 10357. [2021-06-12 20:47:21,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10357 states, 10356 states have (on average 4.489667825415218) internal successors, (46495), 10356 states have internal predecessors, (46495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:21,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10357 states to 10357 states and 46495 transitions. [2021-06-12 20:47:21,469 INFO L78 Accepts]: Start accepts. Automaton has 10357 states and 46495 transitions. Word has length 30 [2021-06-12 20:47:21,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:21,469 INFO L482 AbstractCegarLoop]: Abstraction has 10357 states and 46495 transitions. [2021-06-12 20:47:21,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-06-12 20:47:21,470 INFO L276 IsEmpty]: Start isEmpty. Operand 10357 states and 46495 transitions. [2021-06-12 20:47:21,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:47:21,488 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:21,488 INFO L472 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, 1] [2021-06-12 20:47:21,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable792,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:21,688 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:21,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:21,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1758731406, now seen corresponding path program 93 times [2021-06-12 20:47:21,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:21,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671506742] [2021-06-12 20:47:21,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2021-06-12 20:47:21,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable797 [2021-06-12 20:47:21,841 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 20:47:21,841 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT (5/5) [2021-06-12 20:47:21,842 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 20:47:21,843 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 20:47:21,844 INFO L202 PluginConnector]: Adding new model parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 08:47:21 BasicIcfg [2021-06-12 20:47:21,844 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 20:47:21,844 INFO L168 Benchmark]: Toolchain (without parser) took 774575.88 ms. Allocated memory was 216.0 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 196.1 MB in the beginning and 499.8 MB in the end (delta: -303.6 MB). Peak memory consumption was 925.4 MB. Max. memory is 8.0 GB. [2021-06-12 20:47:21,844 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 216.0 MB. Free memory is still 197.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:47:21,844 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.84 ms. Allocated memory is still 216.0 MB. Free memory was 196.1 MB in the beginning and 194.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:47:21,844 INFO L168 Benchmark]: Boogie Preprocessor took 28.80 ms. Allocated memory is still 216.0 MB. Free memory was 194.6 MB in the beginning and 193.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:47:21,844 INFO L168 Benchmark]: RCFGBuilder took 335.10 ms. Allocated memory is still 216.0 MB. Free memory was 193.4 MB in the beginning and 175.5 MB in the end (delta: 17.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-06-12 20:47:21,844 INFO L168 Benchmark]: TraceAbstraction took 774178.86 ms. Allocated memory was 216.0 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 174.9 MB in the beginning and 499.8 MB in the end (delta: -324.9 MB). Peak memory consumption was 904.5 MB. Max. memory is 8.0 GB. [2021-06-12 20:47:21,845 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 0.15 ms. Allocated memory is still 216.0 MB. Free memory is still 197.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.84 ms. Allocated memory is still 216.0 MB. Free memory was 196.1 MB in the beginning and 194.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.80 ms. Allocated memory is still 216.0 MB. Free memory was 194.6 MB in the beginning and 193.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 335.10 ms. Allocated memory is still 216.0 MB. Free memory was 193.4 MB in the beginning and 175.5 MB in the end (delta: 17.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 774178.86 ms. Allocated memory was 216.0 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 174.9 MB in the beginning and 499.8 MB in the end (delta: -324.9 MB). Peak memory consumption was 904.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 10 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread4Thread1of1ForFork1 with 1 thread instances CFG has 13 procedures, 71 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 105.3ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 23.4ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 78.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=405occurred 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: thread1 with 1 thread instances CFG has 13 procedures, 71 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 21.3ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 2.4ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=405occurred 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: thread4 with 1 thread instances CFG has 13 procedures, 71 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22.3ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 2.7ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=405occurred 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: thread1Thread1of1ForFork0 with 1 thread instances CFG has 13 procedures, 71 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 31.8ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 2.4ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=405occurred 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, 71 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 773771.6ms, OverallIterations: 369, TraceHistogramMax: 2, EmptinessCheckTime: 3533.8ms, AutomataDifference: 507072.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 39857 SDtfs, 104885 SDslu, 363924 SDs, 0 SdLazy, 411461 SolverSat, 41590 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 180539.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21839 GetRequests, 7573 SyntacticMatches, 539 SemanticMatches, 13727 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181289 ImplicationChecksByTransitivity, 354624.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10357occurred in iteration=368, InterpolantAutomatonStates: 12330, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 41337.7ms AutomataMinimizationTime, 368 MinimizatonAttempts, 450470 StatesRemovedByMinimization, 365 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2357.7ms SsaConstructionTime, 5093.1ms SatisfiabilityAnalysisTime, 133588.7ms InterpolantComputationTime, 20808 NumberOfCodeBlocks, 20808 NumberOfCodeBlocksAsserted, 1109 NumberOfCheckSat, 20085 ConstructedInterpolants, 792 QuantifiedInterpolants, 259956 SizeOfPredicates, 2749 NumberOfNonLiveVariables, 44750 ConjunctsInSsa, 9853 ConjunctsInUnsatCore, 723 InterpolantComputations, 13 PerfectInterpolantSequences, 193/3283 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